Network security - Implement and troubleshoot IPv6 first hop security - RA guard
3 important questions on Network security - Implement and troubleshoot IPv6 first hop security - RA guard
What does the RA host mode?
In host mode all RA and router redirect messages are blocked on a port.
What does router mode and what additional options can be checked?
In router mode RA messages are allowed and there are additional options that can be checked and filtered, including:
• Advertised hop count limit
• Advertised managed address configuration flag
• IPv6 address of sender
• Advertised prefixes
• Advertised default router preference
What are the command to configure RA guard host mode on an interface?
To configure an RA guard policy to block all RAs:
Switch(config)#ipv6 nd raguard policy RAGUARD
Switch(config-ra-guard)#device-role host
And then to attach policy to an interface:
Switch(config)#int range fast0/5 - 7
Switch(config-if)#ipv6 nd raguard attach-policy RAGUARD
Switch(config)#ipv6 nd raguard policy RAGUARD
Switch(config-ra-guard)#device-role host
And then to attach policy to an interface:
Switch(config)#int range fast0/5 - 7
Switch(config-if)#ipv6 nd raguard attach-policy RAGUARD
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