Dears
I have IPv4 BGP peer and I want to advertise IPV6 subnet /63 … I add it to the network in bgp and add loopback interface /63 and use redistribute connected .. but the network doesnt appear in advertisement .. any help please ?
Yes - Don’t do it.
Separate sessions for IPv4 and IPv6 peering.
For starters, don’t do redistribute connected. Create an entry in /routing bgp networks, and set synchronize to yes.
Then create an ureachable static route in ipv6 routes.
e.g.:
/routing bgp network add network=2001:db8:cafe:1234::/63
/ipv6 route add dst=2001:db8:cafe:1234::/63 type=unreachable
This will properly originate the prefix into your BGP process.
Next, make sure the peer has address family ipv6 enabled under the advanced tab.
I agree with savage, though - create a peering session for IPv6 using the ISP’s IPv6 address and do IPv4 peering over IPv4, and IPv6 peering over IPv6. The next-hop address can get wonky whenever BGP has to translate between the two protocols. If your ISP hasn’t put a static public address range onto the WAN link, then you should get your ISP to do so, and do the IPv6 peering using those addresses.