- We receive the full IPv6 table from our ISP
- The RIB contains ~100K routes but none of them are injected into FIB
Here is the setup:
r2# show protocols bgp | strip-private bgp XXXXXX { neighbor xxxx:xxxx:ffff::1 { address-family { ipv6-unicast { prefix-list { import DEFAULT-ROUTE-IPV6 } route-map { import NO-EXPORT-IN } soft-reconfiguration { inbound } } } ebgp-multihop 2 password xxxxxx update-source xxxx:xxxx:b001:9ef:5400:03ff:fe48:1774 } parameters { router-id xxx.xxx.128.17 } }
here are routes received from BGP peer (routes are shown as IGP even though they are not and none of them is marked as valid)
r2:~$ show ipv6 bgp neighbors 2001:19f0:ffff::1 routes BGP table version is 0, local router ID is 23.153.128.17, vrf id 0 Default local pref 100, local AS 396142 Status codes: s suppressed, d damped, h history, * valid, > best, = multipath, i internal, r RIB-failure, S Stale, R Removed Nexthop codes: @NNN nexthop's vrf id, < announce-nh-self Origin codes: i - IGP, e - EGP, ? - incomplete Network Next Hop Metric LocPrf Weight Path 2001:4:112::/48 2001:19f0:ffff::1 0 64515 65534 20473 6939 112 i 2001:200::/32 2001:19f0:ffff::1 0 64515 65534 20473 3356 2914 2500 2500 i 2001:200:900::/40 2001:19f0:ffff::1 0 64515 65534 20473 6939 2516 7660 7660 7660 i ...
here is the prefix count:
r2:~$ show ipv6 bgp neighbors 2001:19f0:ffff::1 prefix-counts Prefix counts for 2001:19f0:ffff::1, IPv6 Unicast PfxCt: 107885 Counts from RIB table walk: Adj-in: 107889 Damped: 0 Removed: 0 History: 0 Stale: 0 Valid: 0 All RIB: 107885 PfxCt counted: 107885 Useable: 107885
there are 3 filtered routes:
r2:~$ show ipv6 bgp neighbors 2001:19f0:ffff::1 filtered-routes BGP table version is 0, local router ID is 23.153.128.17, vrf id 0 Default local pref 100, local AS 396142 Status codes: s suppressed, d damped, h history, * valid, > best, = multipath, i internal, r RIB-failure, S Stale, R Removed Nexthop codes: @NNN nexthop's vrf id, < announce-nh-self Origin codes: i - IGP, e - EGP, ? - incomplete Network Next Hop Metric LocPrf Weight Path *> ::/0 2001:19f0:ffff::1 0 64515 i *> 2001:19f0:b000:8088::33/128 2001:19f0:ffff::1 0 0 64515 ? *> 2001:19f0:ffff::1/128 2001:19f0:ffff::1 0 0 64515 ? Total number of prefixes 3
and here is the FIB:
r2:~$ show ipv6 route Codes: K - kernel route, C - connected, S - static, R - RIPng, O - OSPFv3, I - IS-IS, B - BGP, N - NHRP, T - Table, v - VNC, V - VNC-Direct, A - Babel, D - SHARP, F - PBR, f - OpenFabric, > - selected route, * - FIB route, q - queued route, r - rejected route K>* ::/0 [0/1024] via fe80::fc00:3ff:fe48:1774, eth0, 00:28:57 C>* 2001:19f0:b001:9ef::/64 is directly connected, eth0, 00:28:58 S>* 2606:6d00:19f:a800::/56 [1/0] is directly connected, eth0, 00:28:56 C>* 2620:18:6000:bb00::/64 is directly connected, dum0, 00:29:00 C * fe80::/64 is directly connected, eth0, 00:28:57 C>* fe80::/64 is directly connected, lo, 00:29:00 C * fe80::/64 is directly connected, dum0, 00:29:00
As you can see, there is no BGP routes present at all