ImmediateForward plugin unable to set RSU operating mode on RSU

[charlewong]

Employee Status (Select one)

No

Summary

I have installed V2X-Hub 7.9.0 on an Ubuntu 22.04.6 machine from a git checkout and have configured the Immediate Forward Plugin to communicate with my RSU via NTCIP 1218. I have set the snmp credentials for my RSU. The V2X-Hub logs show that the ImmediateForward plugin is unable to set the RSU operating mode over snmp.

Version

7.8.1 (Current)

Expected Behavior

The plugin should be able to set the RSU operating mode on the RSU with SNMP

Actual Behavior

The Event Log tab displays the following warning:

ImmediateForward encountered unhandled exception: Failed to set RSU to operational mode backtrace: (Hint: Use addr2line -C -e 0x#######) to find line number) /var/www/plugins/ImmediateForwardPlugin/bin/ImmediateForwardPlugin(+0x1a300) [0x400001a300] /var/www/plugins/ImmediateForwardPlugin/bin/ImmediateForwardPlugin(+0x1249c) [0x400001249c] /var/www/plugins/ImmediateForwardPlugin/bin/ImmediateForwardPlugin(+0x242b8) [0x40000242b8] /var/www/plugins/ImmediateForwardPlugin/bin/ImmediateForwardPlugin(+0x33dbc) [0x4000033dbc] /usr/local/lib/libtmxapi.so(ivp_onMessageReceived+0x138) [0x4001e46018] /usr/local/lib/libtmxapi.so(+0x61f4) [0x4001e461f4] /usr/local/lib/libtmxapi.so(ivp_receive+0x10) [0x4001e46354] /lib/aarch64-linux-gnu/libc.so.6(+0x7d5b8) [0x400239d5b8] /lib/aarch64-linux-gnu/libc.so.6(+0xe5edc) [0x4002405edc] diagnostic info: Throw location unknown (consider using BOOST_THROW_EXCEPTION) Dynamic exception type: tmx::TmxException std::exception::what: Failed to set RSU to operational mode

The v2xhub docker container logs:

[2025-07-31 07:26:05.550] mxUtils/src/PluginClient.h (486) - DEBUG2 : Sending Event Log Message: {"level":"2","description":"ImmediateForward encountered unhandled exception: Failed to set RSU to operational mode\nbacktrace: (Hint: Use addr2line -C -e <exe> 0x#######) to find line number)\n\/var\/www\/plugins\/ImmediateForwardPlugin\/bin\/ImmediateForwardPlugin(+0x1a300) [0x400001a300]\n\/var\/www\/plugins\/ImmediateForwardPlugin\/bin\/ImmediateForwardPlugin(+0x1249c) [0x400001249c]\n\/var\/www\/plugins\/ImmediateForwardPlugin\/bin\/ImmediateForwardPlugin(+0x242b8) [0x40000242b8]\n\/var\/www\/plugins\/ImmediateForwardPlugin\/bin\/ImmediateForwardPlugin(+0x33dbc) [0x4000033dbc]\n\/usr\/local\/lib\/libtmxapi.so(ivp_onMessageReceived+0x138) [0x4001e46018]\n\/usr\/local\/lib\/libtmxapi.so(+0x61f4) [0x4001e461f4]\n\/usr\/local\/lib\/libtmxapi.so(ivp_receive+0x10) [0x4001e46354]\n\/lib\/aarch64-linux-gnu\/libc.so.6(+0x7d5b8) [0x400239d5b8]\n\/lib\/aarch64-linux-gnu\/libc.so.6(+0xe5edc) [0x4002405edc]\ndiagnostic info:\nThrow location unknown (consider using BOOST_THROW_EXCEPTION)\nDynamic exception type: tmx::TmxException\nstd::exception::what: Failed to set RSU to operational mode\n\n"}

[2025-07-31 07:26:05.552] ils/src/PluginKeepAlive.cpp (75) - DEBUG2 : In check for ImmediateForward
[2025-07-31 07:26:15.552] ils/src/PluginKeepAlive.cpp (75) - DEBUG2 : In check for ImmediateForward
[2025-07-31 07:26:25.552] ils/src/PluginKeepAlive.cpp (75) - DEBUG2 : In check for ImmediateForward
[2025-07-31 07:26:29.881] Utils/src/PluginClient.cpp (162) - INFO   : Config Changed. ImmediateForwardConfigurations: [{"name":"asdf","rsuSpec":"NTCIP1218","address":"172.16.17.96","port":161,"snmpAuth":{"user":"rsu","securityLevel":"authPriv","community":"public","authProtocol":"SHA-512","authPassPhrase":"rsuadmin","privacyProtocol":"AES","privacyPassPhrase":"rsuadmin"},"txMode":"CONT","signMessages":false,"messages":[{ "tmxType": "MAP-P", "sendType": "MAP", "psid": "0x8002", "channel": 183 },{ "tmxType": "PSM-P", "sendType": "PSM", "psid": "0x27", "channel": 183 },{"tmxType":"SSM-P","sendType":"SSM","psid":"0x8002","channel":183},{"tmxType":"SDSM","sendType":"SDSM","psid":"0x8010","channel":183}]}]
[2025-07-31 07:26:29.881] /ImmediateForwardPlugin.cpp (83) - DEBUG  : Updating configuration settings.
[2025-07-31 07:26:29.882] mxUtils/src/SNMPClient.cpp (156) - INFO   : Closing SNMP session
[2025-07-31 07:26:29.882] TmxUtils/src/SNMPClient.cpp (12) - DEBUG1 : String snmp_client configs : 172.16.17.96 161 public rsu authPriv SHA-512 rsuadmin AES rsuadmin 3 1000000
[2025-07-31 07:26:30.020] mxUtils/src/SNMPClient.cpp (150) - INFO   : Established session with device at 172.16.17.96
[2025-07-31 07:26:30.020] mxUtils/src/SNMPClient.cpp (256) - DEBUG1 : Attempting to SET value for 1.3.6.1.4.1.1206.4.2.18.16.2.0 to 2
[2025-07-31 07:26:30.020] mxUtils/src/SNMPClient.cpp (270) - DEBUG  : Created OID for input: 1.3.6.1.4.1.1206.4.2.18.16.2.0
[2025-07-31 07:26:36.029] mxUtils/src/SNMPClient.cpp (274) - DEBUG  : Response request status: 2 (=FAILED)
[2025-07-31 07:26:36.029] mxUtils/src/SNMPClient.cpp (363) - ERROR  : Timeout, no response from server
[2025-07-31 07:26:36.030] Utils/src/PluginClient.cpp (405) - WARNING: ImmediateForward encountered unhandled exception: Failed to set RSU to operational mode
backtrace: (Hint: Use addr2line -C -e <exe> 0x#######) to find line number)
/var/www/plugins/ImmediateForwardPlugin/bin/ImmediateForwardPlugin(+0x1a300) [0x400001a300]
/var/www/plugins/ImmediateForwardPlugin/bin/ImmediateForwardPlugin(+0x1249c) [0x400001249c]
/var/www/plugins/ImmediateForwardPlugin/bin/ImmediateForwardPlugin(+0x242b8) [0x40000242b8]
/var/www/plugins/ImmediateForwardPlugin/bin/ImmediateForwardPlugin(+0x33dbc) [0x4000033dbc]
/usr/local/lib/libtmxapi.so(ivp_onMessageReceived+0x138) [0x4001e46018]
/usr/local/lib/libtmxapi.so(+0x61f4) [0x4001e461f4]
/usr/local/lib/libtmxapi.so(ivp_receive+0x10) [0x4001e46354]
/lib/aarch64-linux-gnu/libc.so.6(+0x7d5b8) [0x400239d5b8]
/lib/aarch64-linux-gnu/libc.so.6(+0xe5edc) [0x4002405edc]
diagnostic info:
Throw location unknown (consider using BOOST_THROW_EXCEPTION)
Dynamic exception type: tmx::TmxException
std::exception::what: Failed to set RSU to operational mode

The snmpd log on the RSU show:

Jul 31 07:26:30 MK6 daemon.info snmpd[3673]: Connection from UDP: [172.16.0.161]:36183->[172.16.17.96]:161
Jul 31 07:26:30 MK6 daemon.info snmpd[3673]: Connection from UDP: [172.16.0.161]:36183->[172.16.17.96]:161
Jul 31 07:26:30 MK6 daemon.warn snmpd[3673]: security service 3 error parsing ScopedPDU
Jul 31 07:26:31 MK6 daemon.info snmpd[3673]: Connection from UDP: [172.16.0.161]:36183->[172.16.17.96]:161
Jul 31 07:26:31 MK6 daemon.warn snmpd[3673]: security service 3 error parsing ScopedPDU
Jul 31 07:26:32 MK6 daemon.info snmpd[3673]: Connection from UDP: [172.16.0.161]:36183->[172.16.17.96]:161
Jul 31 07:26:32 MK6 daemon.warn snmpd[3673]: security service 3 error parsing ScopedPDU
Jul 31 07:26:33 MK6 daemon.info snmpd[3673]: Connection from UDP: [172.16.0.161]:36183->[172.16.17.96]:161
Jul 31 07:26:33 MK6 daemon.warn snmpd[3673]: security service 3 error parsing ScopedPDU
Jul 31 07:26:34 MK6 daemon.info snmpd[3673]: Connection from UDP: [172.16.0.161]:36183->[172.16.17.96]:161
Jul 31 07:26:34 MK6 daemon.warn snmpd[3673]: security service 3 error parsing ScopedPDU
Jul 31 07:26:35 MK6 daemon.info snmpd[3673]: Connection from UDP: [172.16.0.161]:36183->[172.16.17.96]:161
Jul 31 07:26:35 MK6 daemon.warn snmpd[3673]: security service 3 error parsing ScopedPDU

Steps to Reproduce the Actual Behavior

I installed V2X-Hub as follows:

git clone https://github.com/usdot-fhwa-OPS/V2X-Hub.git
cd V2X-Hub
git checkout 7.9.0 -b v7.9.0
cd configuration
sudo ./initialization.sh

ImmediateForward plugin configuration:

[{"name":"asdf","rsuSpec":"NTCIP1218","address":"172.16.17.96","port":161,"snmpAuth":{"user":"rsu","securityLevel":"authPriv","community":"public","authProtocol":"SHA-512","authPassPhrase":"rsuadmin","privacyProtocol":"AES","privacyPassPhrase":"rsuadmin"},"txMode":"CONT","signMessages":false,"messages":[{ "tmxType": "MAP-P", "sendType": "MAP", "psid": "0x8002", "channel": 183 },{ "tmxType": "PSM-P", "sendType": "PSM", "psid": "0x27", "channel": 183 },{"tmxType":"SSM-P","sendType":"SSM","psid":"0x8002","channel":183},{"tmxType":"SDSM","sendType":"SDSM","psid":"0x8010","channel":183}]}]

I am able to read and set the RSU operating mode with snmpset and snmpget from the Ubuntu machine hosting V2X-Hub:

$ snmpget -v 3 -t 1 -l authPriv -u rsu -A rsuadmin -X rsuadmin -a SHA-512 -x AES 172.16.17.96 1.3.6.1.4.1.1206.4.2.18.16.2.0
iso.3.6.1.4.1.1206.4.2.18.16.2.0 = INTEGER: 3
$ snmpset -v 3 -t 1 -l authPriv -u rsu -A rsuadmin -X rsuadmin -a SHA-512 -x AES 172.16.17.96 1.3.6.1.4.1.1206.4.2.18.16.2.0 i 2
iso.3.6.1.4.1.1206.4.2.18.16.2.0 = INTEGER: 2
$ snmpget -v 3 -t 0.01 -l authPriv -u rsu -A rsuadmin -X rsuadmin -a SHA-512 -x AES 172.16.17.96 1.3.6.1.4.1.1206.4.2.18.16.2.0
iso.3.6.1.4.1.1206.4.2.18.16.2.0 = INTEGER: 2

The RSU does not support AES-256. If I change the snmpset and snmpget privacy protocol argument to AES-256, I can reproduce the security service 3 error parsing ScopedPDU errors in the smpd logs on the RSU.

$ snmpget -v 3 -t 1 -l authPriv -u rsu -A rsuadmin -X rsuadmin -a SHA-512 -x AES-256 172.16.17.96 1.3.6.1.4.1.1206.4.2.18.16.2.0
Timeout: No Response from 172.16.17.96.

Related Work

No response

[github-actions]

@cavss A new issue has been created by a non-STOL/Leidos employee:

• Title: ImmediateForward plugin unable to set RSU operating mode on RSU
• Description: ### Employee Status (Select one)

No

Summary

I have installed V2X-Hub 7.9.0 on an Ubuntu 22.04.6 machine from a git checkout and have configured the ImmediateForward plugin with the snmp credentials for my RSU. The V2X-Hub logs show that the ImmediateForward plugin is unable to set the RSU operating mode over snmp.

Version

7.8.1 (Current)

Expected Behavior

The plugin should be able to set the RSU operating mode on the RSU with SNMP

Actual Behavior

The Event Log tab displays the following warning:

ImmediateForward encountered unhandled exception: Failed to set RSU to operational mode backtrace: (Hint: Use addr2line -C -e 0x#######) to find line number) /var/www/plugins/ImmediateForwardPlugin/bin/ImmediateForwardPlugin(+0x1a300) [0x400001a300] /var/www/plugins/ImmediateForwardPlugin/bin/ImmediateForwardPlugin(+0x1249c) [0x400001249c] /var/www/plugins/ImmediateForwardPlugin/bin/ImmediateForwardPlugin(+0x242b8) [0x40000242b8] /var/www/plugins/ImmediateForwardPlugin/bin/ImmediateForwardPlugin(+0x33dbc) [0x4000033dbc] /usr/local/lib/libtmxapi.so(ivp_onMessageReceived+0x138) [0x4001e46018] /usr/local/lib/libtmxapi.so(+0x61f4) [0x4001e461f4] /usr/local/lib/libtmxapi.so(ivp_receive+0x10) [0x4001e46354] /lib/aarch64-linux-gnu/libc.so.6(+0x7d5b8) [0x400239d5b8] /lib/aarch64-linux-gnu/libc.so.6(+0xe5edc) [0x4002405edc] diagnostic info: Throw location unknown (consider using BOOST_THROW_EXCEPTION) Dynamic exception type: tmx::TmxException std::exception::what: Failed to set RSU to operational mode

The v2xhub docker container logs:

[2025-07-31 07:26:05.550] mxUtils/src/PluginClient.h (486) - DEBUG2 : Sending Event Log Message: {"level":"2","description":"ImmediateForward encountered unhandled exception: Failed to set RSU to operational mode\nbacktrace: (Hint: Use addr2line -C -e <exe> 0x#######) to find line number)\n\/var\/www\/plugins\/ImmediateForwardPlugin\/bin\/ImmediateForwardPlugin(+0x1a300) [0x400001a300]\n\/var\/www\/plugins\/ImmediateForwardPlugin\/bin\/ImmediateForwardPlugin(+0x1249c) [0x400001249c]\n\/var\/www\/plugins\/ImmediateForwardPlugin\/bin\/ImmediateForwardPlugin(+0x242b8) [0x40000242b8]\n\/var\/www\/plugins\/ImmediateForwardPlugin\/bin\/ImmediateForwardPlugin(+0x33dbc) [0x4000033dbc]\n\/usr\/local\/lib\/libtmxapi.so(ivp_onMessageReceived+0x138) [0x4001e46018]\n\/usr\/local\/lib\/libtmxapi.so(+0x61f4) [0x4001e461f4]\n\/usr\/local\/lib\/libtmxapi.so(ivp_receive+0x10) [0x4001e46354]\n\/lib\/aarch64-linux-gnu\/libc.so.6(+0x7d5b8) [0x400239d5b8]\n\/lib\/aarch64-linux-gnu\/libc.so.6(+0xe5edc) [0x4002405edc]\ndiagnostic info:\nThrow location unknown (consider using BOOST_THROW_EXCEPTION)\nDynamic exception type: tmx::TmxException\nstd::exception::what: Failed to set RSU to operational mode\n\n"}

[2025-07-31 07:26:05.552] ils/src/PluginKeepAlive.cpp (75) - DEBUG2 : In check for ImmediateForward
[2025-07-31 07:26:15.552] ils/src/PluginKeepAlive.cpp (75) - DEBUG2 : In check for ImmediateForward
[2025-07-31 07:26:25.552] ils/src/PluginKeepAlive.cpp (75) - DEBUG2 : In check for ImmediateForward
[2025-07-31 07:26:29.881] Utils/src/PluginClient.cpp (162) - INFO   : Config Changed. ImmediateForwardConfigurations: [{"name":"asdf","rsuSpec":"NTCIP1218","address":"172.16.17.96","port":161,"snmpAuth":{"user":"rsu","securityLevel":"authPriv","community":"public","authProtocol":"SHA-512","authPassPhrase":"rsuadmin","privacyProtocol":"AES","privacyPassPhrase":"rsuadmin"},"txMode":"CONT","signMessages":false,"messages":[{ "tmxType": "MAP-P", "sendType": "MAP", "psid": "0x8002", "channel": 183 },{ "tmxType": "PSM-P", "sendType": "PSM", "psid": "0x27", "channel": 183 },{"tmxType":"SSM-P","sendType":"SSM","psid":"0x8002","channel":183},{"tmxType":"SDSM","sendType":"SDSM","psid":"0x8010","channel":183}]}]
[2025-07-31 07:26:29.881] /ImmediateForwardPlugin.cpp (83) - DEBUG  : Updating configuration settings.
[2025-07-31 07:26:29.882] mxUtils/src/SNMPClient.cpp (156) - INFO   : Closing SNMP session
[2025-07-31 07:26:29.882] TmxUtils/src/SNMPClient.cpp (12) - DEBUG1 : String snmp_client configs : 172.16.17.96 161 public rsu authPriv SHA-512 rsuadmin AES rsuadmin 3 1000000
[2025-07-31 07:26:30.020] mxUtils/src/SNMPClient.cpp (150) - INFO   : Established session with device at 172.16.17.96
[2025-07-31 07:26:30.020] mxUtils/src/SNMPClient.cpp (256) - DEBUG1 : Attempting to SET value for 1.3.6.1.4.1.1206.4.2.18.16.2.0 to 2
[2025-07-31 07:26:30.020] mxUtils/src/SNMPClient.cpp (270) - DEBUG  : Created OID for input: 1.3.6.1.4.1.1206.4.2.18.16.2.0
[2025-07-31 07:26:36.029] mxUtils/src/SNMPClient.cpp (274) - DEBUG  : Response request status: 2 (=FAILED)
[2025-07-31 07:26:36.029] mxUtils/src/SNMPClient.cpp (363) - ERROR  : Timeout, no response from server
[2025-07-31 07:26:36.030] Utils/src/PluginClient.cpp (405) - WARNING: ImmediateForward encountered unhandled exception: Failed to set RSU to operational mode
backtrace: (Hint: Use addr2line -C -e <exe> 0x#######) to find line number)
/var/www/plugins/ImmediateForwardPlugin/bin/ImmediateForwardPlugin(+0x1a300) [0x400001a300]
/var/www/plugins/ImmediateForwardPlugin/bin/ImmediateForwardPlugin(+0x1249c) [0x400001249c]
/var/www/plugins/ImmediateForwardPlugin/bin/ImmediateForwardPlugin(+0x242b8) [0x40000242b8]
/var/www/plugins/ImmediateForwardPlugin/bin/ImmediateForwardPlugin(+0x33dbc) [0x4000033dbc]
/usr/local/lib/libtmxapi.so(ivp_onMessageReceived+0x138) [0x4001e46018]
/usr/local/lib/libtmxapi.so(+0x61f4) [0x4001e461f4]
/usr/local/lib/libtmxapi.so(ivp_receive+0x10) [0x4001e46354]
/lib/aarch64-linux-gnu/libc.so.6(+0x7d5b8) [0x400239d5b8]
/lib/aarch64-linux-gnu/libc.so.6(+0xe5edc) [0x4002405edc]
diagnostic info:
Throw location unknown (consider using BOOST_THROW_EXCEPTION)
Dynamic exception type: tmx::TmxException
std::exception::what: Failed to set RSU to operational mode

The snmpd log on the RSU show:

Jul 31 07:26:30 MK6 daemon.info snmpd[3673]: Connection from UDP: [172.16.0.161]:36183->[172.16.17.96]:161
Jul 31 07:26:30 MK6 daemon.info snmpd[3673]: Connection from UDP: [172.16.0.161]:36183->[172.16.17.96]:161
Jul 31 07:26:30 MK6 daemon.warn snmpd[3673]: security service 3 error parsing ScopedPDU
Jul 31 07:26:31 MK6 daemon.info snmpd[3673]: Connection from UDP: [172.16.0.161]:36183->[172.16.17.96]:161
Jul 31 07:26:31 MK6 daemon.warn snmpd[3673]: security service 3 error parsing ScopedPDU
Jul 31 07:26:32 MK6 daemon.info snmpd[3673]: Connection from UDP: [172.16.0.161]:36183->[172.16.17.96]:161
Jul 31 07:26:32 MK6 daemon.warn snmpd[3673]: security service 3 error parsing ScopedPDU
Jul 31 07:26:33 MK6 daemon.info snmpd[3673]: Connection from UDP: [172.16.0.161]:36183->[172.16.17.96]:161
Jul 31 07:26:33 MK6 daemon.warn snmpd[3673]: security service 3 error parsing ScopedPDU
Jul 31 07:26:34 MK6 daemon.info snmpd[3673]: Connection from UDP: [172.16.0.161]:36183->[172.16.17.96]:161
Jul 31 07:26:34 MK6 daemon.warn snmpd[3673]: security service 3 error parsing ScopedPDU
Jul 31 07:26:35 MK6 daemon.info snmpd[3673]: Connection from UDP: [172.16.0.161]:36183->[172.16.17.96]:161
Jul 31 07:26:35 MK6 daemon.warn snmpd[3673]: security service 3 error parsing ScopedPDU

Steps to Reproduce the Actual Behavior

I installed V2X-Hub as follows:

git clone https://github.com/usdot-fhwa-OPS/V2X-Hub.git
cd V2X-Hub
git checkout 7.9.0 -b v7.9.0
cd configuration
sudo ./initialization.sh

ImmediateForward plugin configuration:

[{"name":"asdf","rsuSpec":"NTCIP1218","address":"172.16.17.96","port":161,"snmpAuth":{"user":"rsu","securityLevel":"authPriv","community":"public","authProtocol":"SHA-512","authPassPhrase":"rsuadmin","privacyProtocol":"AES","privacyPassPhrase":"rsuadmin"},"txMode":"CONT","signMessages":false,"messages":[{ "tmxType": "MAP-P", "sendType": "MAP", "psid": "0x8002", "channel": 183 },{ "tmxType": "PSM-P", "sendType": "PSM", "psid": "0x27", "channel": 183 },{"tmxType":"SSM-P","sendType":"SSM","psid":"0x8002","channel":183},{"tmxType":"SDSM","sendType":"SDSM","psid":"0x8010","channel":183}]}]

I am able to read and set the RSU operating mode with snmpset and snmpget from the Ubuntu machine hosting V2X-Hub:

$ snmpget -v 3 -t 1 -l authPriv -u rsu -A rsuadmin -X rsuadmin -a SHA-512 -x AES 172.16.17.96 1.3.6.1.4.1.1206.4.2.18.16.2.0
iso.3.6.1.4.1.1206.4.2.18.16.2.0 = INTEGER: 3
$ snmpset -v 3 -t 1 -l authPriv -u rsu -A rsuadmin -X rsuadmin -a SHA-512 -x AES 172.16.17.96 1.3.6.1.4.1.1206.4.2.18.16.2.0 i 2
iso.3.6.1.4.1.1206.4.2.18.16.2.0 = INTEGER: 2
$ snmpget -v 3 -t 0.01 -l authPriv -u rsu -A rsuadmin -X rsuadmin -a SHA-512 -x AES 172.16.17.96 1.3.6.1.4.1.1206.4.2.18.16.2.0
iso.3.6.1.4.1.1206.4.2.18.16.2.0 = INTEGER: 2

The RSU does not support AES-256. If I change the snmpset and snmpget privacy protocol argument to AES-256, I can reproduce the security service 3 error parsing ScopedPDU errors in the smpd logs on the RSU.

$ snmpget -v 3 -t 1 -l authPriv -u rsu -A rsuadmin -X rsuadmin -a SHA-512 -x AES-256 172.16.17.96 1.3.6.1.4.1.1206.4.2.18.16.2.0
Timeout: No Response from 172.16.17.96.

Related Work

No response

• URL: ImmediateForward plugin unable to set RSU operating mode on RSU #749

[paulbourelly999]

Thanks @charlewong, we are going to see if we can reproduce this behavior with other RSUs we have integrated using privacy protocol AES.

[paulbourelly999]

Looking at net-snmp issues. This issue may be related to net-snmp incompatibility issues net-snmp/net-snmp#676. It sounds like with versions below 5.9, net snmp has issues with AES somehow related to openssl. It is still strange that this worked for the CLI and the C++ client. It would be good if we include information about what version of net-snmp we use in each place.

For V2X Hub we use net-snmp 5.9.4.pre2. @charlewong Could you include the version of net-snmp for the snmp-agent on the RSU

[charlewong]

Hi @paulbourelly999 , the RSU uses net-smp 5.8.

I managed to hack together another build of the RSU that uses net-smp 5.9.4.pre2. With this build, I can create a snmp user with AES-256:

net-snmp-config --create-snmpv3-user -A rsuadmin -X rsuadmin -a SHA-512 -x AES-256 rsu0

I can then successfully query from the CLI using AES-256 with this user account:

$ snmpget -v 3 -t 1 -l authPriv -u rsu0 -A rsuadmin -X rsuadmin -a SHA-512 -x AES-256 172.16.17.96 1.3.6.1.4.1.1206.4.2.18.16.2.0
iso.3.6.1.4.1.1206.4.2.18.16.2.0 = INTEGER: 3

However the ImmediateForward plugin still fails in the same way:

[2025-08-01 03:42:36.867] Utils/src/PluginClient.cpp (162) - INFO   : Config Changed. ImmediateForwardConfigurations: [{"name":"asdf","rsuSpec":"NTCIP1218","address":"172.16.17.96","port":161,"snmpAuth":{"user":"rsu0","securityLevel":"authPriv","community":"public","authProtocol":"SHA-512","authPassPhrase":"rsuadmin","privacyProtocol":"AES-256","privacyPassPhrase":"rsuadmin"},"txMode":"CONT","signMessages":false,"messages":[{ "tmxType": "MAP-P", "sendType": "MAP", "psid": "0x8002", "channel": 183 },{ "tmxType": "PSM-P", "sendType": "PSM", "psid": "0x27", "channel": 183 },{"tmxType":"SSM-P","sendType":"SSM","psid":"0x8002","channel":183},{"tmxType":"SDSM","sendType":"SDSM","psid":"0x8010","channel":183}]}]
[2025-08-01 03:42:36.867] /ImmediateForwardPlugin.cpp (83) - DEBUG  : Updating configuration settings.
[2025-08-01 03:42:36.868] mxUtils/src/SNMPClient.cpp (156) - INFO   : Closing SNMP session
[2025-08-01 03:42:36.868] TmxUtils/src/SNMPClient.cpp (12) - DEBUG1 : String snmp_client configs : 172.16.17.96 161 public rsu0 authPriv SHA-512 rsuadmin AES-256 rsuadmin 3 1000000
[2025-08-01 03:42:37.015] mxUtils/src/SNMPClient.cpp (150) - INFO   : Established session with device at 172.16.17.96
[2025-08-01 03:42:37.015] mxUtils/src/SNMPClient.cpp (256) - DEBUG1 : Attempting to SET value for 1.3.6.1.4.1.1206.4.2.18.16.2.0 to 2
[2025-08-01 03:42:37.015] mxUtils/src/SNMPClient.cpp (270) - DEBUG  : Created OID for input: 1.3.6.1.4.1.1206.4.2.18.16.2.0
[2025-08-01 03:42:43.024] mxUtils/src/SNMPClient.cpp (274) - DEBUG  : Response request status: 2 (=FAILED)
[2025-08-01 03:42:43.024] mxUtils/src/SNMPClient.cpp (363) - ERROR  : Timeout, no response from server
[2025-08-01 03:42:43.026] Utils/src/PluginClient.cpp (405) - WARNING: ImmediateForward encountered unhandled exception: Failed to set RSU to operational mode
backtrace: (Hint: Use addr2line -C -e <exe> 0x#######) to find line number)
/var/www/plugins/ImmediateForwardPlugin/bin/ImmediateForwardPlugin(+0x1a300) [0x400001a300]
/var/www/plugins/ImmediateForwardPlugin/bin/ImmediateForwardPlugin(+0x1249c) [0x400001249c]
/var/www/plugins/ImmediateForwardPlugin/bin/ImmediateForwardPlugin(+0x242b8) [0x40000242b8]
/var/www/plugins/ImmediateForwardPlugin/bin/ImmediateForwardPlugin(+0x33dbc) [0x4000033dbc]
/usr/local/lib/libtmxapi.so(ivp_onMessageReceived+0x138) [0x4001e46018]
/usr/local/lib/libtmxapi.so(+0x61f4) [0x4001e461f4]
/usr/local/lib/libtmxapi.so(ivp_receive+0x10) [0x4001e46354]
/lib/aarch64-linux-gnu/libc.so.6(+0x7d5b8) [0x400239d5b8]
/lib/aarch64-linux-gnu/libc.so.6(+0xe5edc) [0x4002405edc]
diagnostic info:
Throw location unknown (consider using BOOST_THROW_EXCEPTION)
Dynamic exception type: tmx::TmxException
std::exception::what: Failed to set RSU to operational mode

I wonder if the issue could be the timeout. I see from the logs the ImmediateForward plugin sets a snmp timeout of 1000000 us. This should be more than enough, but I'd like to try increasing it. Can you please point me to instructinos for rebuilding the plugins and docker container from source?

[paulbourelly999]

Sure, you should be able to increase this value locally and simply call docker build -t <imagename:tagname> . in the project root directory. This should allow you to rebuild it. Alternatively we also have a Dev Container setup using VSCode which is relatively straightfoward and will make rebuilding local changes and testing them far easier. Most of our documentation is located under docs/ folder including documentation for setting up a VSCode Dev Container (https://github.com/usdot-fhwa-OPS/V2X-Hub/blob/develop/docs/Visual_Studio_Code_Setup.md)

NOTE: One thing I have discovered while testing SNMP Client communication is that the errors reported by the client are often misleading. I would trust the snmpd server logs more than the client logs for diagnosing issues

[paulbourelly999]

Update: Testing with the Yunex RSU we have I have confirmed that our SNMP client works wither there server for both AES-256 and AES-128 privacy protocols. They do not have an option for AES plain which may indicate there are issues with that version. Additionally, when you test please ensure that instead of just changing a configuration parameter in the plugin you restart the plugin by disabling it and enabling it. This is the most reliable way to ensure that configuration changes have the desired impact. Would it be helpful to you to schedule a follow on meeting to see if we can make any addition progress solving your issue @charlewong

[charlewong]

@paulbourelly999 I've rebuilt the v2xhub docker container with a larger SNMP timeout. This has allowed the rsuMode to be set. V2X-Hub is then able to create 2 rows in the IFM table but fails trying to create the 3rd row. I'm looking into our RSU logs to see if I can see any reason why.

[2025-08-07 02:11:44.316] mxUtils/src/PluginClient.h (486) - DEBUG2 : Sending Event Log Message: {"level":"2","description":"ImmediateForward encountered unhandled exception: Failed to create IMF row 3\nbacktrace: (Hint: Use addr2line -C -e <exe> 0x#######) to find line number)\nImmediateForwardPlugin(+0x22c60) [0x5634113c1c60]\nImmediateForwardPlugin(+0x23de0) [0x5634113c2de0]\nImmediateForwardPlugin(+0xfa1a) [0x5634113aea1a]\nImmediateForwardPlugin(+0x2e607) [0x5634113cd607]\nImmediateForwardPlugin(+0x3e649) [0x5634113dd649]\n\/usr\/local\/lib\/libtmxapi.so(ivp_onMessageReceived+0x13d) [0x7f22a75fa41d]\n\/usr\/local\/lib\/libtmxapi.so(+0x7624) [0x7f22a75fa624]\n\/usr\/local\/lib\/libtmxapi.so(ivp_receive+0x12) [0x7f22a75fa712]\n\/lib\/x86_64-linux-gnu\/libc.so.6(+0x94ac3) [0x7f22a703fac3]\n\/lib\/x86_64-linux-gnu\/libc.so.6(clone+0x44) [0x7f22a70d0a04]\ndiagnostic info:\nThrow location unknown (consider using BOOST_THROW_EXCEPTION)\nDynamic exception type: tmx::TmxException\nstd::exception::what: Failed to create IMF row 3\n\n"}

[2025-08-07 02:11:52.372] ils/src/PluginKeepAlive.cpp (75) - DEBUG2 : In check for ImmediateForward
[2025-08-07 02:11:52.372] ils/src/PluginKeepAlive.cpp (79) - DEBUG1 : No message sent from ImmediateForward in last 468000 ms.
[2025-08-07 02:11:52.372] ils/src/PluginKeepAlive.cpp (45) - DEBUG3 : Touching keep alive for ImmediateForward
[2025-08-07 02:11:52.372] mxUtils/src/PluginClient.h (149) - DEBUG2 : Sending: {"header":{"type":"System","subtype":"KeepAlive","encoding":"json","timestamp":"1754532712372","flags":"0"},"payload":{"currentTimestamp":"1754532712372","lastTimestamp":"0"}}

[2025-08-07 02:12:02.373] ils/src/PluginKeepAlive.cpp (75) - DEBUG2 : In check for ImmediateForward
[2025-08-07 02:12:12.373] ils/src/PluginKeepAlive.cpp (75) - DEBUG2 : In check for ImmediateForward
[2025-08-07 02:12:22.373] ils/src/PluginKeepAlive.cpp (75) - DEBUG2 : In check for ImmediateForward
[2025-08-07 02:12:32.373] ils/src/PluginKeepAlive.cpp (75) - DEBUG2 : In check for ImmediateForward
[2025-08-07 02:12:42.373] ils/src/PluginKeepAlive.cpp (75) - DEBUG2 : In check for ImmediateForward
[2025-08-07 02:12:52.373] ils/src/PluginKeepAlive.cpp (75) - DEBUG2 : In check for ImmediateForward
[2025-08-07 02:13:02.373] ils/src/PluginKeepAlive.cpp (75) - DEBUG2 : In check for ImmediateForward
[2025-08-07 02:13:12.373] ils/src/PluginKeepAlive.cpp (75) - DEBUG2 : In check for ImmediateForward
[2025-08-07 02:13:12.485] Utils/src/PluginClient.cpp (162) - INFO   : Config Changed. ImmediateForwardConfigurations: [{"name":"asdf","rsuSpec":"NTCIP1218","address":"172.16.17.96","port":161,"snmpAuth":{"user":"rsu0","securityLevel":"authPriv","community":"public","authProtocol":"SHA-512","authPassPhrase":"rsuadmin","privacyProtocol":"AES-256","privacyPassPhrase":"rsuadmin"},"txMode":"CONT","signMessages":false,"messages":[{ "tmxType": "MAP-P", "sendType": "MAP", "psid": "0x8002", "channel": 183 },{ "tmxType": "PSM-P", "sendType": "PSM", "psid": "0x27", "channel": 183 },{"tmxType":"SSM-P","sendType":"SSM","psid":"0x8002","channel":183},{"tmxType":"SDSM","sendType":"SDSM","psid":"0x8010","channel":183}]}]
[2025-08-07 02:13:12.485] /ImmediateForwardPlugin.cpp (83) - DEBUG  : Updating configuration settings.
[2025-08-07 02:13:12.486] mxUtils/src/SNMPClient.cpp (156) - INFO   : Closing SNMP session
[2025-08-07 02:13:12.486] TmxUtils/src/SNMPClient.cpp (12) - DEBUG1 : String snmp_client configs : 172.16.17.96 161 public rsu0 authPriv SHA-512 rsuadmin AES-256 rsuadmin 3 9000000
[2025-08-07 02:13:12.508] mxUtils/src/SNMPClient.cpp (150) - INFO   : Established session with device at 172.16.17.96
[2025-08-07 02:13:12.508] mxUtils/src/SNMPClient.cpp (256) - DEBUG1 : Attempting to SET value for 1.3.6.1.4.1.1206.4.2.18.16.2.0 to 2
[2025-08-07 02:13:12.508] mxUtils/src/SNMPClient.cpp (270) - DEBUG  : Created OID for input: 1.3.6.1.4.1.1206.4.2.18.16.2.0
[2025-08-07 02:13:12.513] mxUtils/src/SNMPClient.cpp (274) - DEBUG  : Response request status: 0 (=SUCCESS)
[2025-08-07 02:13:12.513] mxUtils/src/SNMPClient.cpp (341) - DEBUG  : Success in SET for OID: 1.3.6.1.4.1.1206.4.2.18.16.2.0 Value: 2

[2025-08-07 02:13:12.513] n/src/IMFNTCIP1218Worker.cpp (8) - DEBUG  : Retrieving max Imf rows ...
[2025-08-07 02:13:12.513] mxUtils/src/SNMPClient.cpp (222) - DEBUG1 : Attempting to GET value for: 1.3.6.1.4.1.1206.4.2.18.4.1.0
[2025-08-07 02:13:12.513] mxUtils/src/SNMPClient.cpp (270) - DEBUG  : Created OID for input: 1.3.6.1.4.1.1206.4.2.18.4.1.0
[2025-08-07 02:13:12.516] mxUtils/src/SNMPClient.cpp (274) - DEBUG  : Response request status: 0 (=SUCCESS)
[2025-08-07 02:13:12.516] /src/IMFNTCIP1218Worker.cpp (13) - DEBUG  : Max Imf rows 15
[2025-08-07 02:13:12.516] mxUtils/src/SNMPClient.cpp (256) - DEBUG1 : Attempting to SET value for 1.3.6.1.4.1.1206.4.2.18.4.2.1.5.1 to 6
[2025-08-07 02:13:12.516] mxUtils/src/SNMPClient.cpp (270) - DEBUG  : Created OID for input: 1.3.6.1.4.1.1206.4.2.18.4.2.1.5.1
[2025-08-07 02:13:12.520] mxUtils/src/SNMPClient.cpp (274) - DEBUG  : Response request status: 0 (=SUCCESS)
[2025-08-07 02:13:12.520] mxUtils/src/SNMPClient.cpp (341) - DEBUG  : Success in SET for OID: 1.3.6.1.4.1.1206.4.2.18.4.2.1.5.1 Value: 6

[2025-08-07 02:13:12.520] mxUtils/src/SNMPClient.cpp (256) - DEBUG1 : Attempting to SET value for 1.3.6.1.4.1.1206.4.2.18.4.2.1.5.2 to 6
[2025-08-07 02:13:12.520] mxUtils/src/SNMPClient.cpp (270) - DEBUG  : Created OID for input: 1.3.6.1.4.1.1206.4.2.18.4.2.1.5.2
[2025-08-07 02:13:12.524] mxUtils/src/SNMPClient.cpp (274) - DEBUG  : Response request status: 0 (=SUCCESS)
[2025-08-07 02:13:12.524] mxUtils/src/SNMPClient.cpp (359) - ERROR  : Variable type: �. Error in packet (noSuchName) There is no such variable name in this MIB.
[2025-08-07 02:13:12.524] mxUtils/src/SNMPClient.cpp (372) - ERROR  : SNMP error in response: (noSuchName) There is no such variable name in this MIB.
[2025-08-07 02:13:12.524] /src/IMFNTCIP1218Worker.cpp (23) - WARNING: Cleared IMF Table Rows 0 to 2
[2025-08-07 02:13:12.524] /src/IMFNTCIP1218Worker.cpp (47) - DEBUG1 : Initializing RSU IMF Table
[2025-08-07 02:13:12.524] /src/IMFNTCIP1218Worker.cpp (51) - DEBUG1 : Creating IMF row 1
[2025-08-07 02:13:12.524] mxUtils/src/SNMPClient.cpp (166) - DEBUG1 : Sending SNMP Requests length 7
[2025-08-07 02:13:12.528] mxUtils/src/SNMPClient.cpp (186) - DEBUG  : Outgoing Request :
1.3.6.1.4.1.1206.4.2.18.4.2.1.2.1 x 8002
1.3.6.1.4.1.1206.4.2.18.4.2.1.3.1 i 183
1.3.6.1.4.1.1206.4.2.18.4.2.1.8.1 x FE
1.3.6.1.4.1.1206.4.2.18.4.2.1.4.1 i 1
1.3.6.1.4.1.1206.4.2.18.4.2.1.5.1 i 4
1.3.6.1.4.1.1206.4.2.18.4.2.1.6.1 i 6
1.3.6.1.4.1.1206.4.2.18.4.2.1.7.1 x 01
[2025-08-07 02:13:12.528] mxUtils/src/SNMPClient.cpp (187) - DEBUG  : Response request status: 0 (=SUCCESS)
SNMPv2-SMI::enterprises.1206.4.2.18.4.2.1.2.1 = Hex-STRING: 80 02
SNMPv2-SMI::enterprises.1206.4.2.18.4.2.1.3.1 = INTEGER: 183
SNMPv2-SMI::enterprises.1206.4.2.18.4.2.1.8.1 = Hex-STRING: FE
SNMPv2-SMI::enterprises.1206.4.2.18.4.2.1.4.1 = INTEGER: 1
SNMPv2-SMI::enterprises.1206.4.2.18.4.2.1.5.1 = INTEGER: 4
SNMPv2-SMI::enterprises.1206.4.2.18.4.2.1.6.1 = INTEGER: 6
SNMPv2-SMI::enterprises.1206.4.2.18.4.2.1.7.1 = Hex-STRING: 01
[2025-08-07 02:13:12.528] mxUtils/src/SNMPClient.cpp (166) - DEBUG1 : Sending SNMP Requests length 1
[2025-08-07 02:13:12.531] mxUtils/src/SNMPClient.cpp (186) - DEBUG  : Outgoing Request :
1.3.6.1.4.1.1206.4.2.18.4.2.1.8.1 x FE
[2025-08-07 02:13:12.531] mxUtils/src/SNMPClient.cpp (187) - DEBUG  : Response request status: 0 (=SUCCESS)
SNMPv2-SMI::enterprises.1206.4.2.18.4.2.1.8.1 = Hex-STRING: FE
[2025-08-07 02:13:12.531] /src/IMFNTCIP1218Worker.cpp (51) - DEBUG1 : Creating IMF row 2
[2025-08-07 02:13:12.531] mxUtils/src/SNMPClient.cpp (166) - DEBUG1 : Sending SNMP Requests length 7
[2025-08-07 02:13:12.535] mxUtils/src/SNMPClient.cpp (186) - DEBUG  : Outgoing Request :
1.3.6.1.4.1.1206.4.2.18.4.2.1.2.2 x 27
1.3.6.1.4.1.1206.4.2.18.4.2.1.3.2 i 183
1.3.6.1.4.1.1206.4.2.18.4.2.1.8.2 x FE
1.3.6.1.4.1.1206.4.2.18.4.2.1.4.2 i 1
1.3.6.1.4.1.1206.4.2.18.4.2.1.5.2 i 4
1.3.6.1.4.1.1206.4.2.18.4.2.1.6.2 i 6
1.3.6.1.4.1.1206.4.2.18.4.2.1.7.2 x 01
[2025-08-07 02:13:12.535] mxUtils/src/SNMPClient.cpp (187) - DEBUG  : Response request status: 0 (=SUCCESS)
SNMPv2-SMI::enterprises.1206.4.2.18.4.2.1.2.2 = STRING: "'"
SNMPv2-SMI::enterprises.1206.4.2.18.4.2.1.3.2 = INTEGER: 183
SNMPv2-SMI::enterprises.1206.4.2.18.4.2.1.8.2 = Hex-STRING: FE
SNMPv2-SMI::enterprises.1206.4.2.18.4.2.1.4.2 = INTEGER: 1
SNMPv2-SMI::enterprises.1206.4.2.18.4.2.1.5.2 = INTEGER: 4
SNMPv2-SMI::enterprises.1206.4.2.18.4.2.1.6.2 = INTEGER: 6
SNMPv2-SMI::enterprises.1206.4.2.18.4.2.1.7.2 = Hex-STRING: 01
[2025-08-07 02:13:12.535] mxUtils/src/SNMPClient.cpp (166) - DEBUG1 : Sending SNMP Requests length 1
[2025-08-07 02:13:12.538] mxUtils/src/SNMPClient.cpp (186) - DEBUG  : Outgoing Request :
1.3.6.1.4.1.1206.4.2.18.4.2.1.8.2 x FE
[2025-08-07 02:13:12.538] mxUtils/src/SNMPClient.cpp (187) - DEBUG  : Response request status: 0 (=SUCCESS)
SNMPv2-SMI::enterprises.1206.4.2.18.4.2.1.8.2 = Hex-STRING: FE
[2025-08-07 02:13:12.538] /src/IMFNTCIP1218Worker.cpp (51) - DEBUG1 : Creating IMF row 3
[2025-08-07 02:13:12.538] mxUtils/src/SNMPClient.cpp (166) - DEBUG1 : Sending SNMP Requests length 7
[2025-08-07 02:13:12.543] mxUtils/src/SNMPClient.cpp (186) - DEBUG  : Outgoing Request :
1.3.6.1.4.1.1206.4.2.18.4.2.1.2.3 x 8002
1.3.6.1.4.1.1206.4.2.18.4.2.1.3.3 i 183
1.3.6.1.4.1.1206.4.2.18.4.2.1.8.3 x FE
1.3.6.1.4.1.1206.4.2.18.4.2.1.4.3 i 1
1.3.6.1.4.1.1206.4.2.18.4.2.1.5.3 i 4
1.3.6.1.4.1.1206.4.2.18.4.2.1.6.3 i 6
1.3.6.1.4.1.1206.4.2.18.4.2.1.7.3 x 01
[2025-08-07 02:13:12.543] mxUtils/src/SNMPClient.cpp (187) - DEBUG  : Response request status: 0 (=SUCCESS)
[2025-08-07 02:13:12.543] mxUtils/src/SNMPClient.cpp (359) - ERROR  : Variable type: �. Error in packet (noSuchName) There is no such variable name in this MIB.
[2025-08-07 02:13:12.543] mxUtils/src/SNMPClient.cpp (372) - ERROR  : SNMP error in response: (noSuchName) There is no such variable name in this MIB.
[2025-08-07 02:13:12.543] Utils/src/PluginClient.cpp (405) - WARNING: ImmediateForward encountered unhandled exception: Failed to create IMF row 3
backtrace: (Hint: Use addr2line -C -e <exe> 0x#######) to find line number)
ImmediateForwardPlugin(+0x22c60) [0x5634113c1c60]
ImmediateForwardPlugin(+0x23de0) [0x5634113c2de0]
ImmediateForwardPlugin(+0xfa1a) [0x5634113aea1a]
ImmediateForwardPlugin(+0x2e607) [0x5634113cd607]
ImmediateForwardPlugin(+0x3e255) [0x5634113dd255]
/usr/local/lib/libtmxapi.so(ivp_onMessageReceived+0x129) [0x7f22a75fa409]
/usr/local/lib/libtmxapi.so(+0x7624) [0x7f22a75fa624]
/usr/local/lib/libtmxapi.so(ivp_receive+0x12) [0x7f22a75fa712]
/lib/x86_64-linux-gnu/libc.so.6(+0x94ac3) [0x7f22a703fac3]
/lib/x86_64-linux-gnu/libc.so.6(clone+0x44) [0x7f22a70d0a04]
diagnostic info:
Throw location unknown (consider using BOOST_THROW_EXCEPTION)
Dynamic exception type: tmx::TmxException
std::exception::what: Failed to create IMF row 3

[charlewong]

@paulbourelly999 In addition to the SNMP timeout, there were 2 more issues:

1. Our RSU does not permit duplicate PSIDs in the IFM table. The example ImmediateForward plugin configuration in the README.md contains two different messages (MAP-P and SSM-P) with the same PSID 0x8002. Removing one of these messages from my configuration resolved this issue.
2. Our RSU can take a couple of seconds to switch to standby mode. I modified ImmediateForwardPlugin::UpdateConfigSettings() to poll the RSU operational mode and wait for standby before writing the IFM table.

The following patch implements the above change and also adds a configurable SNMP timeout to the ImmediateForward plugin.

diff --git a/src/v2i-hub/ImmediateForwardPlugin/manifest.json b/src/v2i-hub/ImmediateForwardPlugin/manifest.json
index 7dbe62b6..e48399c1 100644
--- a/src/v2i-hub/ImmediateForwardPlugin/manifest.json
+++ b/src/v2i-hub/ImmediateForwardPlugin/manifest.json
@@ -17,7 +17,13 @@
       "key": "ImmediateForwardConfigurations",
       "default": "[{\"name\": \"East Intersection Cohda\", \"rsuSpec\": \"RSU4.1\",\"address\": \"127.0.0.1\",\"port\": 1516,\"txMode\": \"CONT\",\"signMessages\": false,\"messages\": [{ \"tmxType\": \"SPAT-P\", \"sendType\": \"SPAT\", \"psid\": \"0x8002\", \"channel\": 183 },{ \"tmxType\": \"MAP-P\", \"sendType\": \"MAP\", \"psid\": \"0x8002\", \"channel\": 183 },{ \"tmxType\": \"PSM-P\", \"sendType\": \"PSM\", \"psid\": \"0x27\", \"channel\": 183 }, { \"tmxType\": \"TIM\", \"sendType\": \"TIM\", \"psid\": \"0x8003\", \"channel\": 183 },{ \"tmxType\": \"TMSG07-P\", \"sendType\": \"TMSG07\", \"psid\": \"0x8002\", \"channel\": 183 },{ \"tmxType\": \"TMSG03-P\", \"sendType\": \"TMSG03\", \"psid\": \"0xBFEE\", \"channel\": 183 },{ \"tmxType\": \"TMSG05-P\", \"sendType\": \"TMSG05\", \"psid\": \"0x8003\", \"channel\": 183 },{ \"tmxType\": \"SSM-P\", \"sendType\": \"SSM\", \"psid\": \"0x8002\", \"channel\": 183 },{ \"tmxType\": \"SDSM\", \"sendType\": \"SDSM\", \"psid\": \"0x8010\", \"channel\": 183 }]},{\"name\":\"Yunnex\",\"rsuSpec\":\"NTCIP1218\",\"address\":\"192.168.55.20\",\"port\":161,\"snmpAuth\":{\"user\":\"rsuRwUser\",\"securityLevel\":\"authPriv\",\"community\":\"public\",\"authProtocol\":\"SHA-512\",\"authPassPhrase\":\"St0lcav1!\",\"privacyProtocol\":\"AES-256\",\"privacyPassPhrase\":\"St0lcav1!\"},\"txMode\":\"CONT\",\"signMessages\":true,\"messages\":[{\"tmxType\":\"MAP-P\",\"sendType\":\"MAP\",\"psid\":\"0xE0000017\",\"channel\":183},{\"tmxType\":\"SPAT-P\",\"sendType\":\"SPAT\",\"psid\":\"0x8002\",\"channel\":183},{\"tmxType\":\"PSM-P\",\"sendType\":\"PSM\",\"psid\":\"0x0027\",\"channel\":183},{\"tmxType\":\"TIM\",\"sendType\":\"TIM\",\"psid\":\"0x8003\",\"channel\":183},{\"tmxType\":\"SSM-P\",\"sendType\":\"SSM\",\"psid\":\"0x8002\",\"channel\":183},{\"tmxType\":\"SDSM\",\"sendType\":\"SDSM\",\"psid\":\"0x8010\",\"channel\":183}]}]",
       "description": "JSON data defining the message types, PSIDs, and channel number for messages forwarded to the V2X radios. This can include as many independent radio connection configurations as necessary in an array."
+    },
+    {
+      "key":"SNMPTimeout",
+      "default":"1000000",
+      "description":"The SNMP timeout in microseconds for this plugin"
+
     }
-    
+
   ]
-}
\ No newline at end of file
+}
diff --git a/src/v2i-hub/ImmediateForwardPlugin/src/IMFNTCIP1218Worker.cpp b/src/v2i-hub/ImmediateForwardPlugin/src/IMFNTCIP1218Worker.cpp
index 057ba139..97cfa172 100644
--- a/src/v2i-hub/ImmediateForwardPlugin/src/IMFNTCIP1218Worker.cpp
+++ b/src/v2i-hub/ImmediateForwardPlugin/src/IMFNTCIP1218Worker.cpp
@@ -30,6 +30,16 @@ namespace ImmediateForward {
         
     }
 
+    int getRSUMode(tmx::utils::snmp_client* const client) {
+        snmp_response_obj responseVal;
+        bool operational = client->process_snmp_request(rsu::mib::ntcip1218::rsuModeOid, request_type::GET, responseVal);
+        auto mode = responseVal.val_int;
+        if (!operational) {
+            throw tmx::TmxException("Failed to get RSU operational mode");
+        }
+        return mode;
+    }
+
     void setRSUMode(tmx::utils::snmp_client* const client, unsigned int mode) {
         snmp_response_obj obj;
         obj.type = snmp_response_obj::response_type::INTEGER;
@@ -131,4 +141,4 @@ namespace ImmediateForward {
     }
 
 
-}
\ No newline at end of file
+}
diff --git a/src/v2i-hub/ImmediateForwardPlugin/src/IMFNTCIP1218Worker.h b/src/v2i-hub/ImmediateForwardPlugin/src/IMFNTCIP1218Worker.h
index e2c54149..05ed7110 100644
--- a/src/v2i-hub/ImmediateForwardPlugin/src/IMFNTCIP1218Worker.h
+++ b/src/v2i-hub/ImmediateForwardPlugin/src/IMFNTCIP1218Worker.h
@@ -30,6 +30,12 @@ namespace ImmediateForward {
      * @param client The SNMP client to use for the operation
      */
     void clearImmediateForwardTable( tmx::utils::snmp_client* const client);
+    /**
+     * @brief Get RSU Operational Mode
+     * @param client The SNMP client 
+     * @return The RSU Operational Mode
+     */
+    int getRSUMode(tmx::utils::snmp_client* const client);
     /**
      * @brief Set RSU Operational Mode. It is recommended that before creating or 
      * removing entries in the RSU Immediate Forward Table, the RSU should be
diff --git a/src/v2i-hub/ImmediateForwardPlugin/src/ImmediateForwardPlugin.cpp b/src/v2i-hub/ImmediateForwardPlugin/src/ImmediateForwardPlugin.cpp
index f83a6f8d..c1c3d853 100644
--- a/src/v2i-hub/ImmediateForwardPlugin/src/ImmediateForwardPlugin.cpp
+++ b/src/v2i-hub/ImmediateForwardPlugin/src/ImmediateForwardPlugin.cpp
@@ -81,7 +81,7 @@ namespace ImmediateForward
 	void ImmediateForwardPlugin::UpdateConfigSettings()
 	{
 		PLOG(logDEBUG) << "Updating configuration settings.";
-		
+
 		// Update the configuration setting for all UDP clients.
 		// This includes creation/update of _udpClientList and _imfConfigs
 		_imfConfigs.clear();
@@ -95,6 +95,8 @@ namespace ImmediateForward
 		SetStatus<uint>(Key_SkippedSignError, _skippedSignErrorResponse);
 		std::string immediateForwardConfigurationsJson;
 		GetConfigValue<string>("ImmediateForwardConfigurations", immediateForwardConfigurationsJson, &_configMutex);
+		int snmpTimeout;
+		GetConfigValue<int>("SNMPTimeout",snmpTimeout);
 		_imfConfigs.clear();
 		_imfConfigs =  parseImmediateForwardConfiguration(immediateForwardConfigurationsJson);
 		// Setup UDP Clients
@@ -107,9 +109,9 @@ namespace ImmediateForward
 			}
 			else if ( imfConfig.spec == tmx::utils::rsu::RSU_SPEC::NTCIP_1218) {
 				_snmpClientMap[imfConfig.name] = std::make_unique<tmx::utils::snmp_client>(
-						imfConfig.address, 
-						imfConfig.port, 
-						imfConfig.snmpAuth.value().community, 
+						imfConfig.address,
+						imfConfig.port,
+						imfConfig.snmpAuth.value().community,
 						imfConfig.snmpAuth.value().user,
 						securityLevelToString(imfConfig.snmpAuth.value().securityLevel),
 						imfConfig.snmpAuth.value().authProtocol.value(),
@@ -117,10 +119,18 @@ namespace ImmediateForward
 						imfConfig.snmpAuth.value().privProtocol.value(),
 						imfConfig.snmpAuth.value().privPassPhrase.value(),
 						3,
-						1000000
+						snmpTimeout
 					);
 				// Set to standby mode
 				setRSUMode(_snmpClientMap[imfConfig.name].get(), 2);
+
+				// Wait for mode to change to standby
+				do {
+					usleep(100000);
+				}
+				while (2 != getRSUMode(_snmpClientMap[imfConfig.name].get()));
+
+				// Clear & initialize IFM table
 				clearImmediateForwardTable(_snmpClientMap[imfConfig.name].get());
 				_imfNtcipMessageTypeIndex[imfConfig.name] = initializeImmediateForwardTable(_snmpClientMap[imfConfig.name].get(), imfConfig.messageConfigs, imfConfig.signMessage);
 				// Set to operational mode

[paulbourelly999]

@paulbourelly999 I've rebuilt the v2xhub docker container with a larger SNMP timeout. This has allowed the rsuMode to be set. V2X-Hub is then able to create 2 rows in the IFM table but fails trying to create the 3rd row. I'm looking into our RSU logs to see if I can see any reason why.

[2025-08-07 02:11:44.316] mxUtils/src/PluginClient.h (486) - DEBUG2 : Sending Event Log Message: {"level":"2","description":"ImmediateForward encountered unhandled exception: Failed to create IMF row 3\nbacktrace: (Hint: Use addr2line -C -e <exe> 0x#######) to find line number)\nImmediateForwardPlugin(+0x22c60) [0x5634113c1c60]\nImmediateForwardPlugin(+0x23de0) [0x5634113c2de0]\nImmediateForwardPlugin(+0xfa1a) [0x5634113aea1a]\nImmediateForwardPlugin(+0x2e607) [0x5634113cd607]\nImmediateForwardPlugin(+0x3e649) [0x5634113dd649]\n\/usr\/local\/lib\/libtmxapi.so(ivp_onMessageReceived+0x13d) [0x7f22a75fa41d]\n\/usr\/local\/lib\/libtmxapi.so(+0x7624) [0x7f22a75fa624]\n\/usr\/local\/lib\/libtmxapi.so(ivp_receive+0x12) [0x7f22a75fa712]\n\/lib\/x86_64-linux-gnu\/libc.so.6(+0x94ac3) [0x7f22a703fac3]\n\/lib\/x86_64-linux-gnu\/libc.so.6(clone+0x44) [0x7f22a70d0a04]\ndiagnostic info:\nThrow location unknown (consider using BOOST_THROW_EXCEPTION)\nDynamic exception type: tmx::TmxException\nstd::exception::what: Failed to create IMF row 3\n\n"}

[2025-08-07 02:11:52.372] ils/src/PluginKeepAlive.cpp (75) - DEBUG2 : In check for ImmediateForward
[2025-08-07 02:11:52.372] ils/src/PluginKeepAlive.cpp (79) - DEBUG1 : No message sent from ImmediateForward in last 468000 ms.
[2025-08-07 02:11:52.372] ils/src/PluginKeepAlive.cpp (45) - DEBUG3 : Touching keep alive for ImmediateForward
[2025-08-07 02:11:52.372] mxUtils/src/PluginClient.h (149) - DEBUG2 : Sending: {"header":{"type":"System","subtype":"KeepAlive","encoding":"json","timestamp":"1754532712372","flags":"0"},"payload":{"currentTimestamp":"1754532712372","lastTimestamp":"0"}}

[2025-08-07 02:12:02.373] ils/src/PluginKeepAlive.cpp (75) - DEBUG2 : In check for ImmediateForward
[2025-08-07 02:12:12.373] ils/src/PluginKeepAlive.cpp (75) - DEBUG2 : In check for ImmediateForward
[2025-08-07 02:12:22.373] ils/src/PluginKeepAlive.cpp (75) - DEBUG2 : In check for ImmediateForward
[2025-08-07 02:12:32.373] ils/src/PluginKeepAlive.cpp (75) - DEBUG2 : In check for ImmediateForward
[2025-08-07 02:12:42.373] ils/src/PluginKeepAlive.cpp (75) - DEBUG2 : In check for ImmediateForward
[2025-08-07 02:12:52.373] ils/src/PluginKeepAlive.cpp (75) - DEBUG2 : In check for ImmediateForward
[2025-08-07 02:13:02.373] ils/src/PluginKeepAlive.cpp (75) - DEBUG2 : In check for ImmediateForward
[2025-08-07 02:13:12.373] ils/src/PluginKeepAlive.cpp (75) - DEBUG2 : In check for ImmediateForward
[2025-08-07 02:13:12.485] Utils/src/PluginClient.cpp (162) - INFO   : Config Changed. ImmediateForwardConfigurations: [{"name":"asdf","rsuSpec":"NTCIP1218","address":"172.16.17.96","port":161,"snmpAuth":{"user":"rsu0","securityLevel":"authPriv","community":"public","authProtocol":"SHA-512","authPassPhrase":"rsuadmin","privacyProtocol":"AES-256","privacyPassPhrase":"rsuadmin"},"txMode":"CONT","signMessages":false,"messages":[{ "tmxType": "MAP-P", "sendType": "MAP", "psid": "0x8002", "channel": 183 },{ "tmxType": "PSM-P", "sendType": "PSM", "psid": "0x27", "channel": 183 },{"tmxType":"SSM-P","sendType":"SSM","psid":"0x8002","channel":183},{"tmxType":"SDSM","sendType":"SDSM","psid":"0x8010","channel":183}]}]
[2025-08-07 02:13:12.485] /ImmediateForwardPlugin.cpp (83) - DEBUG  : Updating configuration settings.
[2025-08-07 02:13:12.486] mxUtils/src/SNMPClient.cpp (156) - INFO   : Closing SNMP session
[2025-08-07 02:13:12.486] TmxUtils/src/SNMPClient.cpp (12) - DEBUG1 : String snmp_client configs : 172.16.17.96 161 public rsu0 authPriv SHA-512 rsuadmin AES-256 rsuadmin 3 9000000
[2025-08-07 02:13:12.508] mxUtils/src/SNMPClient.cpp (150) - INFO   : Established session with device at 172.16.17.96
[2025-08-07 02:13:12.508] mxUtils/src/SNMPClient.cpp (256) - DEBUG1 : Attempting to SET value for 1.3.6.1.4.1.1206.4.2.18.16.2.0 to 2
[2025-08-07 02:13:12.508] mxUtils/src/SNMPClient.cpp (270) - DEBUG  : Created OID for input: 1.3.6.1.4.1.1206.4.2.18.16.2.0
[2025-08-07 02:13:12.513] mxUtils/src/SNMPClient.cpp (274) - DEBUG  : Response request status: 0 (=SUCCESS)
[2025-08-07 02:13:12.513] mxUtils/src/SNMPClient.cpp (341) - DEBUG  : Success in SET for OID: 1.3.6.1.4.1.1206.4.2.18.16.2.0 Value: 2

[2025-08-07 02:13:12.513] n/src/IMFNTCIP1218Worker.cpp (8) - DEBUG  : Retrieving max Imf rows ...
[2025-08-07 02:13:12.513] mxUtils/src/SNMPClient.cpp (222) - DEBUG1 : Attempting to GET value for: 1.3.6.1.4.1.1206.4.2.18.4.1.0
[2025-08-07 02:13:12.513] mxUtils/src/SNMPClient.cpp (270) - DEBUG  : Created OID for input: 1.3.6.1.4.1.1206.4.2.18.4.1.0
[2025-08-07 02:13:12.516] mxUtils/src/SNMPClient.cpp (274) - DEBUG  : Response request status: 0 (=SUCCESS)
[2025-08-07 02:13:12.516] /src/IMFNTCIP1218Worker.cpp (13) - DEBUG  : Max Imf rows 15
[2025-08-07 02:13:12.516] mxUtils/src/SNMPClient.cpp (256) - DEBUG1 : Attempting to SET value for 1.3.6.1.4.1.1206.4.2.18.4.2.1.5.1 to 6
[2025-08-07 02:13:12.516] mxUtils/src/SNMPClient.cpp (270) - DEBUG  : Created OID for input: 1.3.6.1.4.1.1206.4.2.18.4.2.1.5.1
[2025-08-07 02:13:12.520] mxUtils/src/SNMPClient.cpp (274) - DEBUG  : Response request status: 0 (=SUCCESS)
[2025-08-07 02:13:12.520] mxUtils/src/SNMPClient.cpp (341) - DEBUG  : Success in SET for OID: 1.3.6.1.4.1.1206.4.2.18.4.2.1.5.1 Value: 6

[2025-08-07 02:13:12.520] mxUtils/src/SNMPClient.cpp (256) - DEBUG1 : Attempting to SET value for 1.3.6.1.4.1.1206.4.2.18.4.2.1.5.2 to 6
[2025-08-07 02:13:12.520] mxUtils/src/SNMPClient.cpp (270) - DEBUG  : Created OID for input: 1.3.6.1.4.1.1206.4.2.18.4.2.1.5.2
[2025-08-07 02:13:12.524] mxUtils/src/SNMPClient.cpp (274) - DEBUG  : Response request status: 0 (=SUCCESS)
[2025-08-07 02:13:12.524] mxUtils/src/SNMPClient.cpp (359) - ERROR  : Variable type: �. Error in packet (noSuchName) There is no such variable name in this MIB.
[2025-08-07 02:13:12.524] mxUtils/src/SNMPClient.cpp (372) - ERROR  : SNMP error in response: (noSuchName) There is no such variable name in this MIB.
[2025-08-07 02:13:12.524] /src/IMFNTCIP1218Worker.cpp (23) - WARNING: Cleared IMF Table Rows 0 to 2
[2025-08-07 02:13:12.524] /src/IMFNTCIP1218Worker.cpp (47) - DEBUG1 : Initializing RSU IMF Table
[2025-08-07 02:13:12.524] /src/IMFNTCIP1218Worker.cpp (51) - DEBUG1 : Creating IMF row 1
[2025-08-07 02:13:12.524] mxUtils/src/SNMPClient.cpp (166) - DEBUG1 : Sending SNMP Requests length 7
[2025-08-07 02:13:12.528] mxUtils/src/SNMPClient.cpp (186) - DEBUG  : Outgoing Request :
1.3.6.1.4.1.1206.4.2.18.4.2.1.2.1 x 8002
1.3.6.1.4.1.1206.4.2.18.4.2.1.3.1 i 183
1.3.6.1.4.1.1206.4.2.18.4.2.1.8.1 x FE
1.3.6.1.4.1.1206.4.2.18.4.2.1.4.1 i 1
1.3.6.1.4.1.1206.4.2.18.4.2.1.5.1 i 4
1.3.6.1.4.1.1206.4.2.18.4.2.1.6.1 i 6
1.3.6.1.4.1.1206.4.2.18.4.2.1.7.1 x 01
[2025-08-07 02:13:12.528] mxUtils/src/SNMPClient.cpp (187) - DEBUG  : Response request status: 0 (=SUCCESS)
SNMPv2-SMI::enterprises.1206.4.2.18.4.2.1.2.1 = Hex-STRING: 80 02
SNMPv2-SMI::enterprises.1206.4.2.18.4.2.1.3.1 = INTEGER: 183
SNMPv2-SMI::enterprises.1206.4.2.18.4.2.1.8.1 = Hex-STRING: FE
SNMPv2-SMI::enterprises.1206.4.2.18.4.2.1.4.1 = INTEGER: 1
SNMPv2-SMI::enterprises.1206.4.2.18.4.2.1.5.1 = INTEGER: 4
SNMPv2-SMI::enterprises.1206.4.2.18.4.2.1.6.1 = INTEGER: 6
SNMPv2-SMI::enterprises.1206.4.2.18.4.2.1.7.1 = Hex-STRING: 01
[2025-08-07 02:13:12.528] mxUtils/src/SNMPClient.cpp (166) - DEBUG1 : Sending SNMP Requests length 1
[2025-08-07 02:13:12.531] mxUtils/src/SNMPClient.cpp (186) - DEBUG  : Outgoing Request :
1.3.6.1.4.1.1206.4.2.18.4.2.1.8.1 x FE
[2025-08-07 02:13:12.531] mxUtils/src/SNMPClient.cpp (187) - DEBUG  : Response request status: 0 (=SUCCESS)
SNMPv2-SMI::enterprises.1206.4.2.18.4.2.1.8.1 = Hex-STRING: FE
[2025-08-07 02:13:12.531] /src/IMFNTCIP1218Worker.cpp (51) - DEBUG1 : Creating IMF row 2
[2025-08-07 02:13:12.531] mxUtils/src/SNMPClient.cpp (166) - DEBUG1 : Sending SNMP Requests length 7
[2025-08-07 02:13:12.535] mxUtils/src/SNMPClient.cpp (186) - DEBUG  : Outgoing Request :
1.3.6.1.4.1.1206.4.2.18.4.2.1.2.2 x 27
1.3.6.1.4.1.1206.4.2.18.4.2.1.3.2 i 183
1.3.6.1.4.1.1206.4.2.18.4.2.1.8.2 x FE
1.3.6.1.4.1.1206.4.2.18.4.2.1.4.2 i 1
1.3.6.1.4.1.1206.4.2.18.4.2.1.5.2 i 4
1.3.6.1.4.1.1206.4.2.18.4.2.1.6.2 i 6
1.3.6.1.4.1.1206.4.2.18.4.2.1.7.2 x 01
[2025-08-07 02:13:12.535] mxUtils/src/SNMPClient.cpp (187) - DEBUG  : Response request status: 0 (=SUCCESS)
SNMPv2-SMI::enterprises.1206.4.2.18.4.2.1.2.2 = STRING: "'"
SNMPv2-SMI::enterprises.1206.4.2.18.4.2.1.3.2 = INTEGER: 183
SNMPv2-SMI::enterprises.1206.4.2.18.4.2.1.8.2 = Hex-STRING: FE
SNMPv2-SMI::enterprises.1206.4.2.18.4.2.1.4.2 = INTEGER: 1
SNMPv2-SMI::enterprises.1206.4.2.18.4.2.1.5.2 = INTEGER: 4
SNMPv2-SMI::enterprises.1206.4.2.18.4.2.1.6.2 = INTEGER: 6
SNMPv2-SMI::enterprises.1206.4.2.18.4.2.1.7.2 = Hex-STRING: 01
[2025-08-07 02:13:12.535] mxUtils/src/SNMPClient.cpp (166) - DEBUG1 : Sending SNMP Requests length 1
[2025-08-07 02:13:12.538] mxUtils/src/SNMPClient.cpp (186) - DEBUG  : Outgoing Request :
1.3.6.1.4.1.1206.4.2.18.4.2.1.8.2 x FE
[2025-08-07 02:13:12.538] mxUtils/src/SNMPClient.cpp (187) - DEBUG  : Response request status: 0 (=SUCCESS)
SNMPv2-SMI::enterprises.1206.4.2.18.4.2.1.8.2 = Hex-STRING: FE
[2025-08-07 02:13:12.538] /src/IMFNTCIP1218Worker.cpp (51) - DEBUG1 : Creating IMF row 3
[2025-08-07 02:13:12.538] mxUtils/src/SNMPClient.cpp (166) - DEBUG1 : Sending SNMP Requests length 7
[2025-08-07 02:13:12.543] mxUtils/src/SNMPClient.cpp (186) - DEBUG  : Outgoing Request :
1.3.6.1.4.1.1206.4.2.18.4.2.1.2.3 x 8002
1.3.6.1.4.1.1206.4.2.18.4.2.1.3.3 i 183
1.3.6.1.4.1.1206.4.2.18.4.2.1.8.3 x FE
1.3.6.1.4.1.1206.4.2.18.4.2.1.4.3 i 1
1.3.6.1.4.1.1206.4.2.18.4.2.1.5.3 i 4
1.3.6.1.4.1.1206.4.2.18.4.2.1.6.3 i 6
1.3.6.1.4.1.1206.4.2.18.4.2.1.7.3 x 01
[2025-08-07 02:13:12.543] mxUtils/src/SNMPClient.cpp (187) - DEBUG  : Response request status: 0 (=SUCCESS)
[2025-08-07 02:13:12.543] mxUtils/src/SNMPClient.cpp (359) - ERROR  : Variable type: �. Error in packet (noSuchName) There is no such variable name in this MIB.
[2025-08-07 02:13:12.543] mxUtils/src/SNMPClient.cpp (372) - ERROR  : SNMP error in response: (noSuchName) There is no such variable name in this MIB.
[2025-08-07 02:13:12.543] Utils/src/PluginClient.cpp (405) - WARNING: ImmediateForward encountered unhandled exception: Failed to create IMF row 3
backtrace: (Hint: Use addr2line -C -e <exe> 0x#######) to find line number)
ImmediateForwardPlugin(+0x22c60) [0x5634113c1c60]
ImmediateForwardPlugin(+0x23de0) [0x5634113c2de0]
ImmediateForwardPlugin(+0xfa1a) [0x5634113aea1a]
ImmediateForwardPlugin(+0x2e607) [0x5634113cd607]
ImmediateForwardPlugin(+0x3e255) [0x5634113dd255]
/usr/local/lib/libtmxapi.so(ivp_onMessageReceived+0x129) [0x7f22a75fa409]
/usr/local/lib/libtmxapi.so(+0x7624) [0x7f22a75fa624]
/usr/local/lib/libtmxapi.so(ivp_receive+0x12) [0x7f22a75fa712]
/lib/x86_64-linux-gnu/libc.so.6(+0x94ac3) [0x7f22a703fac3]
/lib/x86_64-linux-gnu/libc.so.6(clone+0x44) [0x7f22a70d0a04]
diagnostic info:
Throw location unknown (consider using BOOST_THROW_EXCEPTION)
Dynamic exception type: tmx::TmxException
std::exception::what: Failed to create IMF row 3

That is very strange that setting the SNMP timeout had any impact, especially since it seems that the response seems to come in only 4 ms which is well below the initially configured 1000000 microseconds. Another difference I am noticing is that is seems you have replaced the previous placeholder payload FFFF with FE. When testing this with Yunex, we did find that some placeholder payloads would work and others would not. Speaking with their engineers, what I understood was that there were certain payloads that they treated specially and this may have had an impact on what payloads would get rejected. Curious to see if you think the increased timeout will still work with FFFF as the payload.

[paulbourelly999]

• ot permit duplicate PSIDs in the IFM table. The example ImmediateForward plugin configuration in the README.md contains two different messages (MAP-P and SSM-P) with the same PSID 0x8002. Removing one of these messages from my configuration resolved this issue.
• Our RSU can take a couple of seconds to switch to standby mode. I modified ImmediateForwardPlugin::Update

I think Yunex has similar issues with duplicate PSIDs. I thought our current configurations fixed that issue but I may be wrong. Also the timeout configuration is definitely something we can add as well as the RSU Mode wait. Thanks

[paulbourelly999]

Merged a PR including new configuration parameters for timeout and placeholder payload into develop. Still need to add some logic to wait for RSUMode update