Description

In EVPN-VxLAN environment consists of QFX5K switches as Leaf nodes, customer may need to failover uplink ports of Leaf switches to verify convergence time.

Higher convergence time will be observed in Junos version 22.2R3.15 than that in 21.1R2.7 when the customer tried uplink failover via CLI command to disable the uplink port on Leaf switches.

Symptoms

Convergence time in Junos 21.1R2.7 is around 20ms but more than 700ms in Junos 22.2R3.15 as per verified test results.
 

Solution

>>> Ask the customer to failover via hardware failure, which includes (but not limits) rebooting remote Spine node and unplugging (Q)SFPs/optics.

>>> Or use CLI/SW failover after upgrading to one of the fixed versions as per PR1738276.

Here is the external link to the PR:

https://prsearch.juniper.net/problemreport/PR1738276
 

Modification History

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