From: Bob Sinclair (bsinclair@netmasterclass.net)
Date: Wed Feb 16 2005 - 18:19:27 GMT-3
Hi Tim,
Since the router always prompts for an outgoing interface when the
destination is link-local, it would make sense that it needs more
"direction" in order use the link-local address. I was able to get BGP
peers to come up using the configuration below. It peers to the far
link-local address and uses the outgoing interface in the update-source
command:
On R2:
router bgp 24
no synchronization
bgp log-neighbor-changes
neighbor FE80::204:C1FF:FE8E:C40 remote-as 24
neighbor FE80::204:C1FF:FE8E:C40 update-source FastEthernet0/0
no auto-summary
!
address-family ipv4 multicast
no auto-summary
no synchronization
exit-address-family
!
address-family ipv6
neighbor FE80::204:C1FF:FE8E:C40 activate
exit-address-family
On R4:
router bgp 24
no synchronization
bgp log-neighbor-changes
neighbor FE80::2D0:58FF:FE95:C8E1 remote-as 24
neighbor FE80::2D0:58FF:FE95:C8E1 update-source FastEthernet0/0
no auto-summary
!
address-family ipv4 multicast
no auto-summary
no synchronization
exit-address-family
!
address-family ipv6
neighbor FE80::2D0:58FF:FE95:C8E1 activate
exit-address-family
Result:
R4#sh bgp ipv6 summary
BGP router identifier 172.16.104.1, local AS number 24
BGP table version is 1, main routing table version 1
Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down
State/PfxRcd
FE80::2D0:58FF:FE95:C8E1
4 24 10 10 1 0 0 00:06:20 0
R4#
Note good peer!!
Bob Sinclair
CCIE #10427, CCSI 30427, CISSP
www.netmasterclass.net
----- Original Message -----
From: "ccie2be" <ccie2be@nyc.rr.com>
To: "Bob Sinclair" <bsinclair@netmasterclass.net>; "Sean C"
<Upp_and_Upp@hotmail.com>; <ccielab@groupstudy.com>
Sent: Wednesday, February 16, 2005 3:31 PM
Subject: Re: BGP Neighbors for IPv6
> There's a VoD on Cisco's PEC site that talked about this.
>
> I watched it yesterday.
>
> In the example they used, if a link-local address was used in the neighbor
> <ipv6 -LL-addr> remote command, 2 other things were also required:
>
> 1) the neighbor <ipv6 LL-addr> source-update command and
>
> 2) a route-map that sets the next hop to the ipv6 unicast address for that
> neighbor.
>
> I'm not able to try that at the moment, but would you agree?
>
> Tim
> ----- Original Message -----
> From: "Bob Sinclair" <bsinclair@netmasterclass.net>
> To: "Sean C" <Upp_and_Upp@hotmail.com>; <ccielab@groupstudy.com>
> Sent: Wednesday, February 16, 2005 2:52 PM
> Subject: Re: BGP Neighbors for IPv6
>
>
>> Hi Sean,
>>
>> A certain gentleman of our mutual acquaintance assures me that either the
>> routable or link-local address could be used, if the neighbor is directly
>> connected. If you do use the link-local, however, you will need to use
>> update-source. Give it a shot.
>>
>> HTH,
>>
>> Bob Sinclair
>> CCIE #10427, CCSI 30427, CISSP
>> www.netmasterclass.net
>>
>>
>> ----- Original Message -----
>> From: "Sean C" <Upp_and_Upp@hotmail.com>
>> To: <ccielab@groupstudy.com>
>> Sent: Wednesday, February 16, 2005 1:24 PM
>> Subject: BGP Neighbors for IPv6
>>
>>
>> > Hello,
>> >
>> > I have a question but it's not from any particular vendor's practice
> test.
>> > If
>> > I'm given a hub-and-spoke multipoint frame topology, and on the hub and
>> > spokes
>> > I place both IPv6 addresses and IPv6 link-local addresses with the
>> > appropriate
>> > frame maps for the neighbors, if I configure BGP over the topology:
>> > 1-do I need to apply the IPv6 address or the link-local address on the
>> > neighbor statements under the BGP process and address-family?
>> > 2-is there a difference if the neighbors are iBGP vs. eBGP?
>> > 3-can I use either address? Or, perhaps if using the link-local
>> > address
> I
>> > need to update-source?
>> >
>> > I'm trying to keep this a simple question (if possible). Hope this
> makes
>> > sense, and thanks in advance.
>> > Sean
>> >
>> > _______________________________________________________________________
>> > Subscription information may be found at:
>> > http://www.groupstudy.com/list/CCIELab.html
>>
>> _______________________________________________________________________
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