[155392] in North American Network Operators' Group
Re: Trouble with IPv6 setup on Quagga
daemon@ATHENA.MIT.EDU (tom@ninjabadger.net)
Tue Aug 7 05:35:58 2012
In-Reply-To: <CAJ0+aXZK=ghv9_yt3=OJyoVrnFtwDKNwALJXSUdFfUCXNmHE9w@mail.gmail.com>
Date: Tue, 7 Aug 2012 10:35:10 +0100 (BST)
From: tom@ninjabadger.net
To: "Anurag Bhatia" <me@anuragbhatia.com>
Cc: NANOG Mailing List <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
Hi Anurag,
> node4# show bgp ipv6 neighbors 2607:1b00:10:a::1 advertised-routes
> BGP table version is 0, local router ID is 199.116.78.28
> Status codes: s suppressed, d damped, h history, * valid, > best, i -
> internal,
> r RIB-failure, S Stale, R Removed
> Origin codes: i - IGP, e - EGP, ? - incomplete
>
> Network Next Hop Metric LocPrf Weight Path
> *> 2607:1b00:d1::/48
> :: 0 100 32768 i
> *> 2607:1b00:d2::/48
> :: 0 100 32768 i
>
> Total number of prefixes 2
TH: That next-hop does look suspect. If they're on the same subnet, try
disabling next-hop-self. It will just use link-local addressing on the
foreign side, should the next hop be unreachable.
It could be that with next-hop-self configured and no IPv6 address on lo,
this isn't working correctly. Do you have a global address on lo?
> Here's what my Quagga bgpd.conf looks like:
>
> hostname node4
> timers bgp 4 16
>
> router bgp 54456
> bgp router-id 199.116.78.28
> redistribute connected metric 1
> redistribute static metric 1
TH: One thing you should add for sanity:
no bgp default ipv4-unicast
Otherwise Quagga will default to advertising IPv4 address family via IPv6
neighbors.
'bgp network import-check' is also useful to ensure Quagga behaves in the
same way as a Cisco/Juniper router when it comes to advertisements (this
goes for both address families).
> neighbor 2607:1b00:10:a::1 remote-as 54456
> neighbor 2607:1b00:10:a::1 next-hop-self
>
> address-family ipv6
> network 2607:1b00:d1::/48
> network 2607:1b00:d2::/48
> neighbor 2607:1b00:10:a::1 activate
> exit-address-family
TH: This looks fine otherwise.
Tom
