* Iljitsch van Beijnum > IPv6 BGP does in fact carry gloal and link local next hop addresses.
Yes, but my point is that if you don't configure a global (at least non-link-local) prefix on the router interconnections, there's no global address that can be announced as the BGP next-hop. With no global address, the immediate link-local next-hop cannot be resolved in the IGP, and the route is discarded. Or am I missing something? For example, here's my BGP route to your e-mail domain. The key item here is «Protocol next hop: 2a02:228:81:100::», which is the remote router in the link-net to AS3292. If this link was numbered with link-local addresses only, I don't see how this route could possibly be used, unless you start mangling the BGP next-hop? tore@cr2> show route 2001:1af8:2:5::2 active-path extensive inet6.0: 4377 destinations, 8940 routes (4376 active, 0 holddown, 1 hidden) 2001:1af8::/32 (3 entries, 1 announced) TSI: KRT in-kernel 2001:1af8::/32 -> {indirect(1048574)} *BGP Preference: 170/-51 Next hop type: Indirect Next-hop reference count: 5286 Source: 2a02:c0:1000::2 Next hop type: Router, Next hop index: 614 Next hop: fe80::221:59ff:fe0e:9295 via xe-1/0/0.0, selected Protocol next hop: 2a02:228:81:100:: Indirect next hop: 11355ac8 1048574 State: <Active Int Ext> Local AS: 39029 Peer AS: 39029 Age: 3:58:10 Metric: 20 Metric2: 2 MED-plus-IGP: 22 Task: BGP_39029.2a02:c0:1000::2+179 Announcement bits (2): 0-KRT 6-Resolve tree 4 AS path: 3292 16265 I AS path: Recorded Communities: 3292:1110 3292:24601 Accepted Localpref: 50 Router ID: 87.238.32.5 Indirect next hops: 1 Protocol next hop: 2a02:228:81:100:: Metric: 2 Indirect next hop: 11355ac8 1048574 Indirect path forwarding next hops: 1 Next hop type: Router Next hop: fe80::221:59ff:fe0e:9295 via xe-1/0/0.0 2a02:228:81:100::/127 Originating RIB: inet6.0 Metric: 2 Node path count: 1 Forwarding nexthops: 1 Nexthop: fe80::221:59ff:fe0e:9295 via xe-1/0/0.0 -- Tore Anderson Redpill Linpro AS - http://www.redpill-linpro.com/ Tel: +47 21 54 41 27 -------------------------------------------------------------------- IETF IPv6 working group mailing list ipv6@ietf.org Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6 --------------------------------------------------------------------