Cisco Bug: CSCvs78956 - N9K: IPv6 RAGuard policy with device-role router causes RAs to have incorrect FCS
Jun 12, 2020
- Cisco Nexus 9000 Series Switches
Known Affected Releases
Symptom: The issue occurs on a leaf switch where RAGuard with device role router is configured. We have a client router sending IPv6 RAs to the leaf and the policy is applied on this interface. This results in the RAs having an incorrect FCS. e.g.: Leaf1 has below policy: ipv6 nd raguard policy ROUTER device-role router int e1/1 switchport switchport access vlan 1001 ipv6 nd raguard attach-policy ROUTER int e1/2 switchport switchport access vlan 1001 Client Router (IPV6) --- e1/1 leaf e1/2 --- spine The client router sends RAs towards the leaf. These RAs are then flooded out towards the spine, however the RAs have an incorrect FCS. Conditions: This issue is observed when RAGuard policy with device-role router is applied on the client facing interface.
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