The RUCKUS ICX Router must be configured to suppress Router Advertisements on all external IPv6-enabled interfaces.

Many of the known attacks in stateless autoconfiguration are defined in RFC 3756 were present in IPv4 ARP attacks. To mitigate these vulnerabilities, links that have no hosts connected such as the interface connecting to external gateways must be configured to suppress router advertisements.

This requirement is not applicable for the DODIN Backbone.

Review configuration of external IPv6 interfaces for the command below:

interface ethernet x/x/x ipv6 nd suppress-ra

If the perimeter router is not configured to suppress router advertisements on all external interfaces, this is a finding.

Configure the router to suppress Router Advertisements on all external IPv6-enabled interfaces as shown in the example below:

ICX(config)#interface ethernet 1/1/1 ICX(config-if-e2500-1/1/1)# ipv6 nd suppress-ra