IPv6 config on Border Router ASR1001-X

[claurie]

Hi Folks,

I am an IPv6 newbie and I have a problem.

We have been using an ASR1001-X as our Border/Transit router successfully on IPv4 running eBGP and internally to L3 Switch using OSPF.

I have successful eBGP IPv6 session with ISP. I can ping public IPv6 DNS server from the Transit Router however, I cannot ping same server from the internal (OSPFv3) interface or the connected L3 Switch.

I have statically configured a default route ::/0 which is showing in the OSPFv3 Route Table. My layer 3 Switch has this route in it's OPSFv3 Route table and routes to the IPv6 addresses of the ISP connected interface and the ISP Peer.

IPv6 Unicast Routing is enabled on both devices,

However, I cannot ping the Transit Router IPv6 external int or the ISP Peer.

I have attached text file with the two relevant Interface configs as well as the BGP and OSPFv3 configs.

I am obviously missing something, somewhere in the Transit Router config and would greatly appreciate someone showing me where my error is?

Many Thanks in Advance

[Harold Ritter · Accepted solution]

> I have successful eBGP IPv6 session with ISP. I can ping public IPv6 DNS server from the Transit Router however, I cannot ping same

> server from the internal (OSPFv3) interface or the connected L3 Switch.

The reason you can't ping the public DNS server from your internal network is that you do not seem to be advertising your /32 (2406:xxxx/32) to the Internet. I see you use the following network statements to originate 2 /33.

network 2406:xxxx::/33
network 2406:xxxx:8000::/33

Do you have the corresponding routes in your routing table? If not the network statements will not work. It is common to simply have a corresponding static route pointing at the null0 interface. This should cause the two prefixes (/33) to be injected in the BGP table and advertised to you peer.

Regards,

[claurie]

Hi Harold,

Thank you! Problem fixed. I knew it would be something I was overlooking - we have the same config for our IPv4 Network addresses.

Thanks Again!!

Craig

[Harold Ritter]

You are very welcome Craig.