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Cisco Bug: CSCvs52113 - SRv6 L3 AA Local MAC-IP is tagged with ESI-0 and Etag-0 after flapping EVPN and L2VPN config

Last Modified

Sep 02, 2020

Products (1)

  • Cisco ASR 9000 Series Aggregation Services Routers

Known Affected Releases

7.0.2.BASE

Description (partial)

Symptom:
When using EVPN L3 A/A the local MAC IP may have two entries in EVPN, one with ESI-0 and Ethernet Tag 0.  If this occurs, the peer device will not be able to sync MAC-IP

The entries can be seen by running the following command:
<CmdBold>show evpn evi mac<noCmdBold>
If this issue is seen, an entry with a 0 Label and an Ethernet Tag of 0 will be seen in the show command output:

VPN-ID     Encap      MAC address    IP address                               Nexthop                                 Label   
---------- ---------- -------------- ---------------------------------------- --------------------------------------- --------
5017       ROUTE-SYNC 0016.0100.007c 157.0.15.5                               Bundle-Ether20.2016                     0       
   Ethernet Tag                            : 0

Conditions:
The issue cannot occur on initial configuration commit.
This issue can affect all platforms that support EVPN running IOS-XR 7.0.90. The affected platforms are ASR9k and NCS5500.

This issue may occur if the user rapidly removes and re-adds EVPN and L2VPN configuration.
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