From: Yasmin Lara (ylara@sunsetlearning.com)
Date: Fri Jan 12 2007 - 10:25:57 ART
I did not configure the link local addresses (I only did IPv6 enable under the
interfaces and configured a loopback on each router, with global addresses to
test that indeed updates were going across) The router picked his own IPv6
address based on MACs for the serial interface. I think the key is the update
source command since the link local address as you said is unique. So, I don't
think you have to configure link local address unless asked to do so.
Regards,
Yasmin
________________________________
From: nobody@groupstudy.com on behalf of Bit Gossip
Sent: Fri 1/12/2007 3:24 AM
To: ccielab@groupstudy.com
Subject: Re: BGP with link-local addresses
Jim, Lara,
thank you for the big help: indeed your configs works also in my lab.
The big difference is that you have configured an explicit and unique
link-local address on the interface and this makes a difference!
In my original configuration I didn't configure a link-local address and
so the IOS assigned one based on a mac-address of the router.
Debugging IPv6 packets, I have noticed that the router can
not source pkts from such serial links complaining with 'invalid source
address'.
Maybe because it is not unique??? Anyway configuring a unique link-local
address makes the difference!
A bug or a feature ? Certainly not a BGP problem....
Shall we draw the conclusion: "Always configure a unique link-local
address on serial interfaces if need to use them" ?
Thanks,
Luca.
On Fri, 2007-01-12 at 06:39, Jim wrote:
> I don't have any problem using the link-local address, please see
> config below.
>
> r1:
> ipv6 unicast-routing
> interface Loopback0
> ip address 2.2.1.1 255.255.255.0
> !
> interface Serial0/0.1 point-to-point
> ipv6 address FEC0::2/64
> ipv6 address FE80::1 link-local
> frame-relay interface-dlci 201
> !
> router bgp 1
> no synchronization
> bgp log-neighbor-changes
> neighbor FE80::2 remote-as 2
> neighbor FE80::2 update-source Serial0/0.1
> no neighbor FE80::2 activate
> no auto-summary
> !
> address-family ipv6
> neighbor FE80::2 activate
> exit-address-family
> !
>
> ####
> r2:
> ipv6 unicast-routing
> interface Serial0/0.1 point-to-point
> ipv6 address FEC0::1/64
> ipv6 address FE80::2 link-local
> frame-relay interface-dlci 210
> !
> router bgp 2
> no synchronization
> bgp log-neighbor-changes
> neighbor FE80::1 remote-as 1
> neighbor FE80::1 update-source Serial0/0.1
> no neighbor FE80::1 activate
> no auto-summary
> !
> address-family ipv6
> neighbor FE80::1 activate
> exit-address-family
>
>
> ### show output
> r1:
> # show bgp ipv6 summ
> BGP router identifier 2.2.1.1, local AS number 1
> BGP table version is 1, main routing table version 1
>
> Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down
> State/PfxRcd
> FE80::2 4 2 5 5 1 0 0
> 00:02:22 0
>
>
> r1(config)#do sh bgp ipv6 summ
> BGP router identifier 2.2.1.1, local AS number 1
> BGP table version is 1, main routing table version 1
>
> Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down
> State/PfxRcd
> FE80::2 4 2 5 5 1 0 0
> 00:02:22 0
> % NOTE: This command is deprecated. Please use 'show bgp ipv6 unicast'
>
> r1(config)#do sh bgp ipv6 uni nei
> BGP neighbor is FE80::2, remote AS 2, external link
> ...
> Connection state is ESTAB, I/O status: 1, unread input bytes:
> 0
> Connection is ECN Disabled, Mininum incoming TTL 0, Outgoing TTL 1
> Local host: FE80::1, Local port: 15843
> Foreign host: FE80::2, Foreign port: 179
>
>
> r2(config-router-af)#do show bgp ipv6 uni summ
> BGP router identifier 2.2.13.2, local AS number 2
> BGP table version is 1, main routing table version 1
>
> Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down
> State/PfxRcd
> FE80::1 4 1 11 11 1 0 0
> 00:08:46 0
> r2(config-router-af)#do show bgp ipv6 uni nei
> BGP neighbor is FE80::1, remote AS 1, external link
> ...
> Connection state is ESTAB, I/O status: 1, unread input bytes: 0
> Connection is ECN Disabled
> Local host: FE80::2, Local port: 179
> Foreign host: FE80::1, Foreign port: 15843
>
>
> On 1/11/07, Bit Gossip <bit.gossip@chello.nl> wrote:
> Group,
> there is no way I can bring up a BGP session using IPv6
> link-local
> addresses over a point-point FR link. Same story for a GRE
> tunnel.
> While it works fine over a ethernet connection.
>
> I noticed that even if I can ping the link-local address of
> the peer, I
> can not telnet it; maybe this is the problem.
>
> Did someone succeeded in this task?
>
> Thanks,
> Luca
>
>
This archive was generated by hypermail 2.1.4 : Thu Feb 08 2007 - 23:46:56 ART