Use an IPv6 IS-IS accept policy instance to apply to a specific advertising Backbone Edge Bridge (BEB).
ipv6 accept adv-rtr <x.xx.xx>
ipv6 accept adv-rtr <x.xx.xx> enable
ipv6 accept adv-rtr <x.xx.xx> i-sid <1-16777215>
ipv6 accept adv-rtr <x.xx.xx> i-sid <1-16777215> enable
ipv6 accept adv-rtr <x.xx.xx> i-sid <1-16777215> route-map WORD<1-64>
ipv6 accept adv-rtr <x.xx.xx> isid-list WORD<1-32>
ipv6 accept adv-rtr <x.xx.xx> isid-list WORD<1-32> enable
ipv6 accept adv-rtr <x.xx.xx> isid-list WORD<1-32> route-map WORD<1-64>
ipv6 accept adv-rtr <x.xx.xx> route-map WORD<1-64>
no ipv6 accept adv-rtr <x.xx.xx>
no ipv6 accept adv-rtr <x.xx.xx> enable
no ipv6 accept adv-rtr <x.xx.xx> i-sid <1-16777215>
no ipv6 accept adv-rtr <x.xx.xx> i-sid <1-16777215> enable
no ipv6 accept adv-rtr <x.xx.xx> i-sid <1-16777215> route-map
no ipv6 accept adv-rtr <x.xx.xx> isid-list WORD<1-32>
no ipv6 accept adv-rtr <x.xx.xx> isid-list WORD<1-32> enable
no ipv6 accept adv-rtr <x.xx.xx> route-map
None
IS-IS Router Configuration