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Cisco Bug: CSCvu14337 - C9k is doing extra replication of Auto-RP packets in MVPN setup

Last Modified

Sep 10, 2020

Products (1)

  • Cisco Catalyst 9500 Series Switches

Known Affected Releases

16.9.5

Description (partial)

Symptom:
C9k is doing extra replication of Auto-RP packets in MVPN setup when configured with anycast rp on dual home CE connected PEs.

Conditions:
[*] C9500 running 17.2 or older.
[*] MVPN and Auto-RP configuration
[*] Auto rp is configured on MVRF with anycast rp on PEs. MVRF on both PEs are connected via a l2 link. When a VLAN is associated with VRF on both PEs and Vlan is reachable via l2 link between PEs  as well as via mvpn underlay tunnels.  
 -- The above case is possible when Dual home CE is used. In that case, both PEs will see each other as neighbor for a given vlan interface.
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