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How to suppress IPv6 RA on Cisco and Cisco Nexus


Servers have a habit of automatically configuring IPv6 when an interface is added to a VLAN or Port though SLAAC. This is useful for client networks but not so useful for servers.

It is possible to suppress RA messages to prevent this from a Cisco router interface.

interface Vlan100
   ipv6 nd ra suppress all

The command is slightly different on a Cisco Nexus.

interface Vlan200
   ipv6 nd ra suppress

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