Preview Tool

Cisco Bug: CSCvs78956 - N9K: IPv6 RAGuard policy with device-role router causes RAs to have incorrect FCS

Last Modified

Jun 12, 2020

Products (1)

  • Cisco Nexus 9000 Series Switches

Known Affected Releases


Description (partial)

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.


Leaf1 has below policy:

ipv6 nd raguard policy ROUTER
 device-role router

int e1/1
  switchport access vlan 1001
  ipv6 nd raguard attach-policy ROUTER

int e1/2
 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.

This issue is observed when RAGuard policy with device-role router is applied on the client facing interface.
Bug details contain sensitive information and therefore require a account to be viewed.

Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
  • Severity
  • Known Fixed Releases
  • Related Community Discussions
  • Number of Related Support Cases
Bug information is viewable for customers and partners who have a service contract. Registered users can view up to 200 bugs per month without a service contract.