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Dell SmartFabric OS10 User Guide Release 10.5.3

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IPv6 RA Guard

The IPv6 Router Advertisement (RA) guard feature prevents the OS10 switch from receiving unwanted and rouge RA messages from its neighbor devices. RA guard inspects and validates the RA messages against the policy that you configured. Depending on the validation result, RA guard forwards or drops the packets that match the policy conditions.

This feature is applicable only for an environment where all messages between IPv6 end devices traverse through an RA guard-enabled Layer 2 (L2) switch. This feature is not supported if the end devices communicate directly without an RA guard-capable L2 device.

Limitations

  • RA guard validation is not applicable for IPv6-tunneled RA packets.
  • This feature is supported only in the ingress direction and not supported at egress.
  • OS10 does not validate IPv6 unicast RA packets that include extension headers and IPv6 unicast RA fragmented packets.

Configuration notes

  • If you enable the IPv6 RA guard and port security feature on the same interface, ensure that you do not use the flood option.
  • IPv6 RA guard policy takes precedence over the Access Control List (ACL) that is applied on the interface.

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