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nokia_sros (vSIM) Non-sequential interface issue #3106

@antoinekh

Description

@antoinekh

Non-sequential interface assignment causes interface issue

Description

When a non-sequential interface is assigned (skipping one or more ports in the sequence), the interface remains operationally down despite being administratively up. No traffic passes, packet capture shows nothing leaving the interface, and any protocol configured on it (LAG, etc.) will fail as a result.

Example

On my lab interface 1/1/1-1/1/3 are configured. LAG configured on the interface.

If I want to use the interface 1/1/5 without using the 1/1/4 I will have an issue.
Nothing will leave the interface, no packet capture from wireshark

Operational state stay down

A:lab@NCAKE101# show lag 20

===============================================================================
Lag Data
===============================================================================
Lag-id         Adm     Opr     Weighted Threshold Up-Count MC Act/Stdby
    name                                                   
-------------------------------------------------------------------------------
20             up      down    No       0         0        N/A
    lag-20
===============================================================================

[/]
A:lab@NCAKE101# 

As soon as I switch to interface 1/1/4 and redeploy the lab, everything works fine and the operational state is up. The configuration is identical.

A:lab@NCAKE101# show lag 20

===============================================================================
Lag Data
===============================================================================
Lag-id         Adm     Opr     Weighted Threshold Up-Count MC Act/Stdby
    name                                                   
-------------------------------------------------------------------------------
20             up      up      No       0         1        N/A
    lag-20
===============================================================================

[/]
A:lab@NCAKE101# 

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