[c-nsp] 15.0(1)SY: IPv6 BGP neighbours remain idle

[Phil Mayers]

On 27/10/11 09:10, Matti Saarinen wrote:
>
> I was brave (or stupid?) enough to try 15.0(1)SY on sup2t. It appears to
> work otherwise ok with our simple setup except IPv6 BGP. The neighbours
> remain in the idle state. When enabling debug bgp ipv6 unicast I see the
> algo following line in the logs:
>
> nbr global [...] Active open failed - route to peer is invalid

Hmm. I just tried it with an iBGP neighbor on our test sup2T running 
15.0(1)SY (talking to a sup720 running 12.2(33)SXJ1)

Seems to work:

sh ip bgp ipv6 uni nei 2001:630:12::1 | inc BGP|family|essio
BGP neighbor is 2001:630:12::1,  remote AS 64580, internal link
   BGP version 4, remote router ID 194.82.152.1
   BGP state = Established, up for 00:02:11
   Neighbor sessions:
     1 active, is not multisession capable (disabled)
     Session: 2001:630:12::1
     Address family IPv6 Unicast: advertised and received
     Multisession Capability:
  For address family: IPv6 Unicast
   Session: 2001:630:12::1
   BGP table version 362, neighbor version 362/0
     Bestpath from iBGP peer:            256        n/a


Config at the SY side was:

router bgp 64580
  neighbor 2001:630:12::1  remote-as 64580
  address-family ipv6
   neighbor 2001:630:12::1  activate

Config at the SXJ side was:


router bgp 64580
  address-family ipv6 unicast
   neighbor 2001:630:12::B  remote-as 64580
   neighbor 2001:630:12::B  route-map DENYALL in
   neighbor 2001:630:12::B  route-map DENYALL out
   neighbor 2001:630:12::B  update-source Loopback1

>
> I can ping the neighbour address from the router. Route and CEF tables
> agree on where the peer is. What am I missing here? Is there some
> specific parameter I need to enable so that IPv6 BGP would work on the
> 15.0(1)SY? The same config worked on 12.2SX (sup32) and also on
> 12.2(50)SY (sup2t).

Which IOS image are you running? What IGP?

What's the output for "sh ipv6 route <neigh>"