From: Ivan (ivan@iip.net)
Date: Sun Dec 10 2006 - 12:07:52 ART
Sorry for issue. After definig peer AS you need to change remote-as (not
local-as) statement.
On Sunday 10 December 2006 17:53, Ivan wrote:
> >From dump below you can find right AS from BGP-notification
>
> -----------------------
> BGP-3-NOTIFICATION: sent to neighbor 1.1.1.2 2/2 (peer in wrong AS) 2 bytes
> 00C8 FFFF FFFF FFFF FFFF FFFF FFFF FFFF FFFF 002D 0104
> -----------------------
>
> 00C8 - AS from peer.
> From here You can tune AS onto the router with local-as statement.
>
>
>
> R1#sh run | b router bgp
> router bgp 100
> no synchronization
> bgp log-neighbor-changes
> neighbor 1.1.1.2 remote-as 222
> no auto-summary
> !
>
> R1#
> *Dec 10 17:45:27.007: %BGP-3-NOTIFICATION: sent to neighbor 1.1.1.2 2/2
> (peer in wrong AS) 2 bytes 00C8 FFFF FFFF FFFF FFFF FFFF FFFF FFFF FFFF
> 002D 0104 00C8 00B4 0101 0102 1002 0601 0400 0100 0102 0280 0002 0202 00
> *Dec 10 17:45:55.191: %BGP-3-NOTIFICATION: received from neighbor 1.1.1.2
> 2/2 (peer in wrong AS) 2 bytes 0064
>
> ---------------------------------------------------------------------------
>
> R2#sh run | b router bgp
> router bgp 200
> no synchronization
> bgp log-neighbor-changes
> neighbor 1.1.1.1 remote-as 111
> no auto-summary
>
> R2#
> *Dec 10 17:44:58.447: %BGP-3-NOTIFICATION: sent to neighbor 1.1.1.1 2/2
> (peer in wrong AS) 2 bytes 0064 FFFF FFFF FFFF FFFF FFFF FFFF FFFF FFFF
> 002D 0104 0064 00B4 0101 0101 1002 0601 0400 0100 0102 0280 0002 0202 00
> *Dec 10 17:45:26.035: %BGP-3-NOTIFICATION: received from neighbor 1.1.1.1
> 2/2 (peer in wrong AS) 2 bytes 00C8
> *Dec 10 17:45:54.215: %BGP-3-NOTIFICATION: sent to neighbor 1.1.1.1 2/2
> (peer in wrong AS) 2 bytes 0064 FFFF FFFF FFFF FFFF FFFF FFFF FFFF FFFF
> 002D 0104 0064 00B4 0101 0101 1002 0601 0400 0100 0102 0280 0002 0202 00
>
> On Sunday 10 December 2006 17:07, Serdar Kut wrote:
> > hi
> > this is an interesting situation..I made some try about it but nothing
> > works for me.I think you can know that AS number unless remote As admin
> > tells you about it.
> >
> > any comments?
> >
> > On 12/10/06, Ivan <ivan@iip.net> wrote:
> > > You must force the remote peer to initiate BGP-session. Then in error
> > > message
> > > you see AS-number wich expect from you.
> > > To achieve this try to apply outbound access-list to interface directed
> > > to remote peer
> > >
> > > access-list 150 deny ip host BGP_IP_ORIGIN host BGP_IP_PEER eq bgp
> > > access-list 150 permit ip any any
> > >
> > > On Sunday 10 December 2006 11:53, CharlesB wrote:
> > > > I am doing a task in IE labs.
> > > >
> > > > The task says, far end router admin mis-configured BGP AS number, and
> > >
> > > they
> > >
> > > > can not correct it now. Find a solution to peer with their router.
> > > > And they indicate the far end configured AS, so we can put the
> > > > local-as
> > >
> > > XX
> > >
> > > > to match with their config.
> > > > Now, what if, we do not know what they put there.
> > > > I keep using debug ip bgp on my end, but I can not see the info. I
> > > > put
> > >
> > > on
> > >
> > > > my router wrong target AS number, wrong local-as etc. The result is
> > > > that
> > >
> > > it
> > >
> > > > is hard to figure out what AS they are expecting from me.
> > > > If I go to far end and do the same debug I can see what was expected
> > > > AS from me in that router, but this does not help the case I am
> > > > trying to figure out.
> > > > Am I missing something here?
> > > > May be there is no solution to this? We must know their mistake, is
> > > > that correct?
> > > > Any thoughts?
> > > >
> > > > _____________________________________________________________________
> > > >__ Subscription information may be found at:
> > > > http://www.groupstudy.com/list/CCIELab.html
> > >
> > > --
> > > Ivan
> > >
> > > _______________________________________________________________________
> > > Subscription information may be found at:
> > > http://www.groupstudy.com/list/CCIELab.html
> >
> > _______________________________________________________________________
> > Subscription information may be found at:
> > http://www.groupstudy.com/list/CCIELab.html
-- Ivan
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