Description

Post upgrading the SRX to 22.2R3, ethernet switching is not working across intra VLAN subnets access.

Ping between 2 intra vlan ip-address does not work.

 

Symptoms

ping between intra vlan ip-addresses stop working post upgrade of the SRX.

 

Solution

The traffic between intra vlan will stop working when STP is configured on the associated interface and ethernet switching mode is enabled on the device.
To check STP configuration:
protocols {
    l2-learning {
        global-mode switching;
    }
    rstp {
        interface all;
    }

To check ethernet switching mode: 
> show ethernet-switching global-information

 

This issue is addressed in the PR, https://prsearch.juniper.net/problemreport/PR1770303 

Workaround is to disable spanning-tree protocol, further reboot the SRX for the change to take effect.

Configuration snippet:-
root# set protocols rstp disable

root# commit

Reboot the SRX:-
root> request system reboot
Reboot the system ? [yes,no] (no) yes

 

Resolved-In:- junos:20.2R3-S9 junos:20.4R3-S10 junos:21.2R3-S7 junos:21.4R3-S6 junos:22.1R3-S5 junos:22.2R3-S3 junos:22.2R3-S4 junos:22.3R3-S2 junos:22.3R3-S3 junos:22.4R3-S2 junos:23.2R2 junos:23.4R2 junos:24.1R1

Modification History

2024-02-15 : Article Created