So I have a 2951 setup with a Port-channel to a set of L3 Nexus 5548's on a VPC.
IPv4 seems to work fine. IPv6 on the other hand I'm getting a loop detected. %IPV6_ND-4-LOOPBACK: Looped back NS(DAD) packet detected for <IPv6 address> on Port-channel XX.yy What am I missing so that IPv6 will work? Can someone head me down the right path? Sample Config: 2951 interface Port-channelxx.yy encapsulation dot1Q xxx ip address 10.x.yy.5 255.255.255.0 ipv6 address 2620:xx:yy:zz::5/64 ipv6 enable Nexus interface port-channelxx description router switchport mode trunk speed 1000 vpc xx interface Vlanyyy description no shutdown ip address 10.x.yy.2/24 ipv6 address 2620:xx:yy:zz::2/64 ipv6 router <snip> ip router <snip> ip pim sparse-mode hsrp version 2 hsrp yyy preempt priority 110 ip 10.x.yy.1 hsrp yyy ipv6 preempt priority 130 ip 2620:xx:yy:zz:::1 ip dhcp relay address 10.x.y.z ipv6 dhcp relay address 2620:xx:yy:zz::40 is it as easy as only allowing router vlan's down the VPC on the nexus? TIA Scott _______________________________________________ cisco-nsp mailing list cisco-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/