Been stuck for over an hour on the following:
On a ASR9k (4.1.2) acting as RR i 'm getting IPv4 next-hops instead of
IPv4-mapped ones, although the 6VPE router (ASR001, 15.1(3)S3) seems to set the
next-hop as it should.
PE (ASR001, 15.1(3)S3)
----------------------
BGP(5): (base) 10.10.253.161 send UPDATE (format)
[1241:109]2a02:2148:2:10::10/127, next ::FFFF:10.10.253.164, label 2689, metric
0, path Local, extended community RT:1241:109
RR (ASR9k, 4.1.2)
-----------------
bgp[1047]: [rtr]: UPDATE from 10.10.253.164 contains nh 10.10.253.164/32,
gw_afi 0, flags 0x0, nlri_afi 8
bgp[1047]: [rtr]: NH-Validate-Create: addr=10.10.253.164/32, len=24, nlriafi=8,
nbr=10.10.253.164, gwafi=0, gwlen=4, gwaddrlen=32::: nhout=0x5dd73910,
validity=1, attrerror=0x0000
bgp[1047]: [rtr]: UPDATE from 10.10.253.164 contains NLRIs for IPv4-Unicast AF
which is not configured and/or not negotiated under the neighbor
bgp[1047]: [rtr]: UPDATE from 10.10.253.164 contains nh 10.10.253.164/32,
gw_afi 0, flags 0x0, nlri_afi 8
bgp[1047]: [rtr] (vpn6u): Received UPDATE from 10.10.253.164 with attributes:
bgp[1047]: [rtr] (vpn6u): nexthop 10.10.253.164/32, origin ?, localpref 100,
metric 0, extended community RT:1241:109
bgp[1047]: [rtr] (vpn6u): Received prefix 2ASN:1241:109:2a02:2148:2:10::10/127
(path ID: none) with MPLS label 2689 from neighbor 10.10.253.164
which leads to this:
Network Next Hop Metric LocPrf Weight Path
Route Distinguisher: 1241:109
*>i2a02:2148:2:10::10/127
10.10.253.164 0 100 0 ?
When using another 6VPE/RR pair (both ASR001, 15.1(3)S3), next-hop is fine.
PE (ASR001, 15.1(3)S3)
----------------------
BGP(5): (base) 10.10.231.4 send UPDATE (format)
[1241:141]2A02:2148:10:20::20/127, next ::FFFF:10.10.253.165, label 4169,
metric 0, path 65141, extended community RT:1241:141
RR (ASR001, 15.1(3)S3)
----------------------
BGP: nbr_topo global 10.10.253.165 VPNv6 Unicast:base (0x7FB919BC17D0:1) rcvd
Refresh Start-of-RIB
BGP: nbr_topo global 10.10.253.165 VPNv6 Unicast:base (0x7FB919BC17D0:1)
refresh_epoch is 2
BGP(5): 10.10.253.165 rcvd UPDATE w/ attr: nexthop ::FFFF:10.10.253.165, origin
?, localpref 100, metric 0, merged path 65141, AS_PATH , extended community
RT:1241:141
which leads to this:
Network Next Hop Metric LocPrf Weight Path
Route Distinguisher: 1241:141
*>i2A02:2148:10:20::20/127
::FFFF:10.10.253.165
0 100 0 65141 ?
Before going into sniffing the packets on the ASR9k and/or opening a SR, any
ideas why ASR9k thinks it's IPv4-Unicast AF? Is "nlri_afi 8" something to worry
about?
--
Tassos
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