with BGP, ( and with most protocols, for that matter ) one must consider the
hop distance. BGP can also be a bit pickier in that the protocol is designed
requiring the end points be on the same network. If you are natting, then by
definition the endpoints are not on the same network.
that said, what trickery can one use? static nat because remember your far
side has to be configured with a static neighbor statement. there is no
guarantee your natted BGP router will get the same address assignment every
time. then there is the ebgp multihop, which needs be in place if the two
neighbors are not on the same net. and there must be a route to the defined
neighbor in the routing table. this is usually done by static routes. for
your outside router, how do you provide a static route across public space
to a private inside address? anyplace along the way some router might have a
private space directly connected network of that net number, and then you're
screwed. or a filter denying traffic destined to private space, and then
you're screwed. and how would you troubleshoot this mess.
personally, I think you're looking for trouble when you design with your
edge router ( BGP ) behind NAT. what exactly are you trying to accomplish?
Chuck
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of
B.J. Wilson
Sent: Sunday, July 22, 2001 1:40 PM
To: [EMAIL PROTECTED]
Subject: Re: Configure Nat with BGP [7:13265]
I don't think it really matters which routing protocol you use. The
"inside" interface is the one with the address you want to keep private
(like a 10.0.0.0 address). The "outside" interface is the one with a
publically-routable address (anything other than 10.0.0.0, 172.16.0.0, or
192.168.0.0).
----- Original Message -----
From: "Justin Lofton"
To:
Sent: Sunday, July 22, 2001 3:02 PM
Subject: Configure Nat with BGP [7:13265]
> I'm trying to configure NAT on a router that is running BGP between 4
> internet circuits. Can't find anything on CCO. Which interface do I use
as
> ip nat outside? Just one or all four? I'm confused. Can anyone out there
> help me with this one?
>
> Thanks Everyone!
>
> Justin Lofton
> Account Executive/CCNA
> Tredent Data Systems
> [EMAIL PROTECTED]
> V: (818) 222-3770
> F: (818) 222-3778
> http://www.tredent.com/
Message Posted at:
http://www.groupstudy.com/form/read.php?f=7&i=13269&t=13265
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