From: dusth@comcast.net
Date: Fri Nov 11 2005 - 11:22:33 GMT-3
Hi Leigh, Yes, you are right. I can make the tunnel up and BGP traverse inside the tunnel if I give tunnel ip address and using tunnel ip address for peering. However, usually additional ip address and floating static route are not allowed and if I can not redistribute BGP into IGP:) What would be the better solution? Dustin
-------------- Original message --------------
> Quick note - if you do put that route in, the tunnel will collapse...
> As it'll think the destination of the tunnel is down the tunnel...
>
> Give the tunnel an ip address and peer with that as a test.
>
> LH
>
> Godswill Oletu wrote:
>
> >Dustine,
> >
> >nei 4.4.4.4 update-source loopback0
> >
> >Tell this router that, when it is negotiating bgp session with neighbor
> >4.4.4.4, it should present the ip address on interface loopback0 as its
> >source address.
> >
> >If you debug bgp on this router or on the remote router, you will discover
> >that this router is actually using the ip address of loopback0 as its source
> >address.
> >
> >But for this router to reach neighbor 4.4.4.4, it will go to your IGP
> >routing table and pick the next hop address to reach 4.4.4.4 and will send
> >the traffic to neighbor 4.4.4.4 through the next hop address in your
> >routing table. If that next hop address is through the tunnel14, then the
> >traffic will go through the tunnel14 interface.
> >
> >So, the answer to your question will a No.
> >
> >But if you do "ip route 4.4.4.4 255.255.255.255 tunnel 14'
> >
> >Then, bgp traffic will attempt to reach neighbor 4.4.4.4 via tunnel 14.
> >
> >HTH
> >Godswill Oletu
> >
> >
> >----- Original Message -----
> >From:
> >To:
> >Sent: Thursday, November 10, 2005 7:05 PM
> >Subject: BGP and Tunnel
> >
> >
> >
> >
> >>Hi all, I need some clarification on how does bgp know to traverse inside
> >>
> >>
> >the tunnel and what parameter of the tunnel interface tell that for bgp end
> >points? I do not have access to the lab right now so I can not verify the
> >config.
> >
> >
> >>Here is the example:
> >>r1:
> >>interface tunnel 14
> >> ip unnumber loopback 0
> >> tunnel source 1.1.1.1
> >> tunnel destination 4.4.4.4
> >>bgp 10
> >> nei 4.4.4.4 remote-as 10
> >> nei 4.4.4.4 update-source loopback0
> >>Does the ip unnumber of the tunnel or the tunnel source & destination tell
> >>
> >>
> >router that bgp traffic need to traverse inside the tunnel?
> >
> >
> >>Thanks in advance,
> >>Dustin
> >>
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> >>
> >
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