From: John Matus (john_matus@hotmail.com)
Date: Thu Jun 02 2005 - 14:11:05 GMT-3
ok, here is part of a config below. if you look @ neighbor 128.1.0.1, my
input was as follows
router bgp 100
neighbor 128.1.0.1 remote 100
address-family ipvt
neighbor 128.1.0.1 activate
the result to the running config is as follows:
router bgp 100
no synchronization
bgp log-neighbor-changes
neighbor 2001:128:1:0:250:73FF:FE5D:F5C1 remote-as 100
neighbor 54.1.1.254 remote-as 54
neighbor 128.1.0.1 remote-as 100
no auto-summary
!
address-family ipv4 multicast
no auto-summary
no synchronization
exit-address-family
!
address-family ipv6
neighbor 2001:128:1:0:250:73FF:FE5D:F5C1 activate
neighbor 54.1.1.254 activate
exit-address-family
!
address-family ipv4
no neighbor 2001:128:1:0:250:73FF:FE5D:F5C1 activate
neighbor 54.1.1.254 activate
neighbor 128.1.0.1 activate
no auto-summary
no synchronization
exit-address-family
>From: "Scott Morris" <swm@emanon.com>
>Reply-To: <swm@emanon.com>
>To: "'John Matus'"
><john_matus@hotmail.com>,<ccie2be@nyc.rr.com>,<ccielab@groupstudy.com>
>Subject: RE: ipv6 for bgp
>Date: Thu, 2 Jun 2005 01:51:16 -0400
>
>Interesting one....
>
>Again... Without familiarity or much context here, my guess would be that
>this is Cisco's implementation of RFC 2545 support (ipv6 on MBGP). Take a
>look at section 4 where it discusses transport, and that may be why you see
>that neighbor magically defined like that under your IPv6 address family.
>
>I haven't played with this lab, or tried that myself for magical discovered
>networks... But depending on what the rest of the config on your router
>looked like (particularly IPv6 config) that may be a feasible explanation.
>
>Perhaps one of the Brian's will chime in here with info about their own
>labs!
>
>Cheers,
>
>Scott
>
>-----Original Message-----
>From: John Matus [mailto:john_matus@hotmail.com]
>Sent: Thursday, June 02, 2005 12:28 AM
>To: swm@emanon.com; ccie2be@nyc.rr.com; ccielab@groupstudy.com
>Subject: RE: ipv6 for bgp
>
>yes, my config <for ease of discussion> was address-fam ipv6 nei 1.1.1.1
>activate ............................
>but, like i mentioned. after the adj came up, i did a show running config
>and there <magically> appeared a seemingly equal ipv6 statement of the
>kind:
>
>nei 1.1.1.1 remote 100
>address-family ipv6
>nei 1.1.1.1 activate
>nei 2001::x remote 100
>
>i did not configure the statement "nei 2001::x remote 100". it just
>appeared!!! why is that? am i missing something or should i go 4 my 10th
>cup of coffee today :)
>
> >From: "Scott Morris" <swm@emanon.com>
> >Reply-To: <swm@emanon.com>
> >To: "'John Matus'"
> ><john_matus@hotmail.com>,<ccie2be@nyc.rr.com>,<ccielab@groupstudy.com>
> >Subject: RE: ipv6 for bgp
> >Date: Wed, 1 Jun 2005 22:47:31 -0400
> >
> >Ok. So you gave yourself reachability there somehow. And presumably
> >you had basic connectivity in order to reach that one peer. (neighbor
> >with the
> >ipv6 address)
> >
> >So that's the guy you're discussing IPv6 stuff with.
> >
> >Now, I haven't got a clue how the Brian's labs are setup, although I'm
> >sure they're mentally abusive! :) Beyond that though, I would expect
> >that you have the same BGP problems we have in IPv4. Since your peer
> >is in your AS, what does that tell you? The next hop isn't going to
> >change, so wherever they point you for reachable routes, you need to know
>how to get there...
> >
> >Your original post though showed your peer in ipv6 address family as
> >1.1.1.1
> >which is an IPv4 address. :)
> >
> >Scott
> >
> >
> >-----Original Message-----
> >From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> >John Matus
> >Sent: Wednesday, June 01, 2005 10:19 PM
> >To: swm@emanon.com; ccie2be@nyc.rr.com; ccielab@groupstudy.com
> >Subject: RE: ipv6 for bgp
> >
> >ok, but why- after i typed in the config below - did i then see the
> >ipv6 address in the running config, even tho i did not enter it??? it
> >was as though there was some sort of ipv6 negotiation/discovery process
> >involved in this.....
> >(preface/post-face: this was an IE lab. i was configuring ipv6 to
> >peer w/ a backbone router of which i had no control over. the running
> >config of my router had the ipv6 mapping as though i entered it manually
>doing:
> >router bgp 100
> >nei 1.2.3.5 remote 100
> >address-fam ipv6
> >nei xxxx.xxxx.xxxx.xxxx:: remote 100
> >
> > >From: "Scott Morris" <swm@emanon.com>
> > >Reply-To: <swm@emanon.com>
> > >To: "'John Matus'"
> > ><john_matus@hotmail.com>,<ccie2be@nyc.rr.com>,<ccielab@groupstudy.com
> > >>
> > >Subject: RE: ipv6 for bgp
> > >Date: Wed, 1 Jun 2005 21:11:49 -0400
> > >
> > >But on the other hand, when you try to reach BGP across the network
> > >will it work? When the next hop is seen as an IPv4 address, doesn't
> > >that kinda mess things up?
> > >
> > >I can see it, I just can't get there! ;)
> > >
> > >-----Original Message-----
> > >From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
> > >Of John Matus
> > >Sent: Wednesday, June 01, 2005 8:22 PM
> > >To: swm@emanon.com; ccie2be@nyc.rr.com; ccielab@groupstudy.com
> > >Subject: RE: ipv6 for bgp
> > >
> > >well scott,
> > >if i was asked to peer 2 router with ipv6 bgp, would i have fulfilled
> > >that task per my example below?
> > >when i do a "sh bgp ipv6 nei sum" i do get a neighbor 1.1.1.1, and
> >when
> > >i
> > >
> > >check the running config i've got the ipv6 address added to my bgp
> > >process.............
> > >
> > > >From: "Scott Morris" <swm@emanon.com>
> > > >Reply-To: <swm@emanon.com>
> > > >To: "'ccie2be'" <ccie2be@nyc.rr.com>,"'John Matus'"
> > > ><john_matus@hotmail.com>,<ccielab@groupstudy.com>
> > > >Subject: RE: ipv6 for bgp
> > > >Date: Wed, 1 Jun 2005 20:04:18 -0400
> > > >
> > > >Not quite. An address family simply says "what are we going to
> > > >talk about?"
> > > >
> > > >Don't confuse BGP with IP routing protocols. BGP is an application
> > > >that discusses IP routes. By default it talks about IPv4 routes
> > > >'cause that's what it was created for. However, it also discusses
> > > >other things like VPNv4, Multicast and IPv6. The application is
> > > >still the
> > >application.
> > > >
> > > >So in your example there, you are peering two IPv4 devices with an
> > > >IPv4 TCP application to talk about IPv6 routes. You may now know
> > > >where these routes are but have nowhere to use them!
> > > >
> > > >It's kinda like you and I discussing some entertaining words in
> >Japanese.
> > > >While it may be very nice that we now know a few choice words, it's
> > > >not like either of us has any place to actually use that knowledge
> > > >(at least in my case!).
> > > >
> > > >HTH,
> > > >
> > > >Scott
> > > >
> > > >-----Original Message-----
> > > >From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On
> > > >Behalf Of ccie2be
> > > >Sent: Wednesday, June 01, 2005 6:35 PM
> > > >To: 'John Matus'; ccielab@groupstudy.com
> > > >Subject: RE: ipv6 for bgp
> > > >
> > > >What's the physical link over which BGP is trying to peer?
> > > >
> > > >It does make a difference.
> > > >
> > > >Tim
> > > >
> > > >-----Original Message-----
> > > >From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On
> > > >Behalf Of John Matus
> > > >Sent: Wednesday, June 01, 2005 6:03 PM
> > > >To: ccielab@groupstudy.com
> > > >Subject: ipv6 for bgp
> > > >
> > > >just wondering if my observations were correct..........
> > > >if you have a peer that runs both ipv4 and ipv6 and you do the
> >following:
> > > >
> > > >router bgp 100
> > > >neighbor 1.1.1.1 remote 100
> > > >address-family ipv6
> > > >neighbor 1.1.1.1 activate
> > > >
> > > >the result is that both ipv4 and ipv6 adjacencies come up.
> > > >
> > > >i checked the running config after and found the ipv6 address
> > > >mapping in the
> > > >
> > > >config, but when i do a "show bgp ipv6 neighbor" it does not show
> > > >the
> > > >ipv6 address of the remote host, hence my question............
> > > >
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