Double Vlan tagging on the FH packets

[ajesh-pk]

Somehow I get double Vlan tagged by the dpdk application, because of which the RU is marking it as bad packets. I captured the packets form switch, can you suggest how to solve this.

`
ran_node_name: gnb

amf:
n2_bind_addr: 10.2.2.54 # The address or hostname of the AMF.
n3_bind_addr: 10.2.3.54 # A local IP that the gNB binds to for traffic from the AMF.
addr: 10.2.2.177

hal:
eal_args: "--lcores (1,3)@(1,3,5,7,9,11,13,15,17,19,21,23,25,27,29) -a 0000:b1:01.0"

ru_ofh:
t1a_max_cp_dl: 470 # Maximum T1a on Control-Plane for Downlink in microseconds.
t1a_min_cp_dl: 419 # Minimum T1a on Control-Plane for Downlink in microseconds.
t1a_max_cp_ul: 336 # Maximum T1a on Control-Plane for Uplink in microseconds.
t1a_min_cp_ul: 285 # Minimum T1a on Control-Plane for Uplink in microseconds.
t1a_max_up: 345 # Maximum T1a on User-Plane in microseconds.
t1a_min_up: 294 # Minimum T1a on User-Plane in microseconds.
ta4_max: 331 # Maximum Ta4 on User-Plane in microseconds.
ta4_min: 50 # Minimum Ta4 on User-Plane in microseconds.
is_prach_cp_enabled: true # Configures if Control-Plane messages should be used to receive PRACH messages.
compr_method_ul: bfp # Uplink compression method.
compr_bitwidth_ul: 9 # Uplink IQ samples bitwidth after compression.
compr_method_dl: bfp # Downlink compression method.
compr_bitwidth_dl: 9 # Downlink IQ samples bitwidth after compression.
compr_method_prach: bfp # PRACH compression method.
compr_bitwidth_prach: 9 # PRACH IQ samples bitwidth after compression.
enable_ul_static_compr_hdr: true # Configures if the compression header is present for uplink User-Plane messages (false) or not present (true).
enable_dl_static_compr_hdr: true # Configures if the compression header is present for downlink User-Plane messages (false) or not present (true).
iq_scaling: 9 # IQ samples scaling factor applied before compression, should be a positive value smaller than 10.
cells:
- network_interface: 0000:b1:01.0 # Ethernet interface name used to communicate with the RU.
ru_mac_addr: 98:ae:71:04:83:bb # RU MAC address.
du_mac_addr: 00:11:22:33:44:66 # DU MAC address.
vlan_tag_cp: 2 # VLAN tag value for C-Plane.
vlan_tag_up: 2 # VLAN tag value for U-Plane.
prach_port_id: [4, 5, 6, 7] # PRACH eAxC port value.
dl_port_id: [0, 1, 2, 3] # Downlink eAxC port values.
ul_port_id: [0, 1, 2, 3] # Uplink eAxC port values.

cell_cfg:
dl_arfcn: 649884 # ARFCN of the downlink carrier (center frequency).
band: 78 # The NR band.
channel_bandwidth_MHz: 100 # Bandwith in MHz. Number of PRBs will be automatically derived.
common_scs: 30 # Subcarrier spacing in kHz used for data.
plmn: "090170" # PLMN broadcasted by the gNB.
tac: 1 # Tracking area code (needs to match the core configuration).
pci: 1 # Physical cell ID.
nof_antennas_dl: 4 # Downlink number of antennas.
nof_antennas_ul: 4 # Uplink number of anntennas.
prach:
prach_config_index: 159 # PRACH configuration index.
prach_root_sequence_index: 0 # PRACH root sequence index.
zero_correlation_zone: 0 # Zero correlation zone.
prach_frequency_start: 0 # Offset in PRBs of lowest PRACH transmission occasion in frequency domain respective to PRB 0.
pucch:
#sr_period_ms: 20 # Sets the SR period in milliseconds. This can be set either 20 or 40 ms.
f1_nof_cell_res_sr: 15 # Sets the number of PUCCH F1 resources available per cell for SR.
f2_nof_cell_res_csi: 15 # Sets the number of PUCCH F2 resources available per cell for CSI.
csi:
#csi_rs_period: 40 # Sets the CSI-RS period in milliseconds. This can be set either 20 or 40 ms.
pusch:
dmrs_additional_position: 2 # Sets the PUSCH DMRS additional position.
tdd_ul_dl_cfg:
dl_ul_tx_period: 5
nof_dl_symbols: 10 # Number of Downlink symbols at the beginning of the slot following full Downlink slots.
nof_ul_symbols: 2 # Number of Uplink symbols at the end of the slot preceding the first full Uplink slot.
nof_dl_slots: 3 # Number of consecutive full Downlink slots.
nof_ul_slots: 1 # Number of consecutive full Uplink slots.

log:
filename: /tmp/gnb.log # Path of the log file.
all_level: info # Logging level applied to all layers.

pcap:
mac_enable: false # Set to true to enable MAC-layer PCAPs.
mac_filename: /tmp/gnb_mac.pcap # Path where the MAC PCAP is stored.
ngap_enable: false # Set to true to enable NGAP PCAPs.
ngap_filename: /tmp/gnb_ngap.pcap # Path where the NGAP PCAP is stored.
`

SRS (1).zip

[andrepuschmann]

Hey @ajesh-pk - please disable VLAN tagging on your virtual function as our OFH implementation will add the VLANs itself.