Hello,
I have two ASR9k border ("CE") routers that have a BGP peering relationship with each other. Downstream, I have a Catalyst 6807 (Sup2T-XL) Core router with a BGP-enabled link to each border.
ASR9k#1 === ASR9k#2
\ /
Catalyst 6807
The ASRs both default-originate to the core, bot not to each other (and certainly not to my ISPs). If I log in to ASR#1, enter the BGP neighbor configuration mode, and enter "shut" on the neighbor to the core, I see the 6807 populate the RIB/FIB with a default route to ASR#2. If I re-enable the neighbor on ASR#1 and then shutdown the neighbor within ASR#2, I see the default route populate to ASR#1.
So, I show that the 6807 is seeing the route to both devices.
Problem: with all neighbor relationships "no shutdown", I only see a single default route from the 6807 to one of the the ASRs. I'm not seeing ECMP. Here's a sample route display, with all neighbors "up":
6807-core>sh bgp ipv6 unicast neighbors 2610:58:FFF:13:128:197:254:122 routes | include ::/0
*>i ::/0 2610:58:FFF:13:128:197:254:122
6807-core>sh bgp ipv6 unicast neighbors 2610:58:FFF:3d:128:197:254:118 routes | include ::/0
* i ::/0 2610:58:FFF:3D:128:197:254:118
6807-core>sh ipv6 route | sec ::/0
B ::/0 [200/0]
via 2610:58:FFF:13:128:197:254:122
6807-core>
6807-core>
6807-core>
6807-core>sh ipv6 route 2001::
Routing entry for ::/0
Known via "bgp 111", distance 200, metric 0, type internal
Route count is 1/1, share count 0
Routing paths:
2610:58:FFF:13:128:197:254:122
MPLS label: nolabel
Last updated 05:21:51 ago
6807-core>
I see the same effect with the point-to-point subnet between the two routers; since I'm redistributing local, I should see ECMP there but I only see one route. Is there anything I can check, to fix ECMP?
I looked at this, but it only talks to how to enable IPv4 ECMP, there was no comperable "platform" command for IPv6: http://www.cisco.com/c/en/us/products/collateral/switches/catalyst-6800-series-switches/guide-c07-733457.html#_Toc406542451
