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[QFX] Traffic drops after changing lo0 address on QFX5110/QFX5120 platforms with EVPN/VXLAN

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Article ID: KB36300 KB Last Updated: 11 Nov 2020Version: 1.0
Summary:

Users might notice traffic drops after changing the loopback IP address in QFX5110/QFX5120 platforms due to either a stale IP address entry or a missing IP address entry.

This article describes what must be done to resolve this problem.

 

Symptoms:

On QFX5110 and QFX5120 platforms, changing the loopback (lo0) IP address might sometimes result in either a stale IP address entry in the mpls_entry table or missing IP address entry, which results in traffic drop for VXLAN traffic.

Triggers

  • QFX5110 and QFX5120 platforms

  • EVPN VXLAN

  • Changing lo0 IP address

 

Solution:

To resolve this problem, perform either of the following:

  • While changing the loopback IP address, perform a commit full.

OR

  • Restart the Packet Forwarding Engine process by using the following:

request app-engine service restart packet-forwarding-engine
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