BGP and NAT

From: Darren Hosking (dhosking@xxxxxxxxxxxxxxxx)
Date: Sat Apr 21 2001 - 13:41:22 GMT-3


   
I'm trying to configure BGP with the EBGP connections over NAT (ie one BGP
router using registered addresses, the other using private addresses with a
static NAT translation for the EBGP peer to connect to). I receive the
routes for the other AS no problems but believe I will have an issue with
the next-hop of routes I advertise.

What address is used for the next-hop address by default and for neighbor
next-hop-self?

If I use a route-map to set the next-hop address of outbound BGP routes, can
I set it to a registered IP address known to the peer but not known to the
IGP so the neighbor gets the correct registered address for routes
advertised?

Is BGP with NAT a reasonable thing to do? If not, how can you have multiple
connections to ISP's behind (say) PIX firewalls?

        Darren
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