From: dusth@comcast.net
Date: Tue Aug 16 2005 - 19:24:02 GMT-3
Yes, I help implemented in few mons back for some of our customer accounts are using MPLS for primary inter-communication for all the apps b/t all site and datacenter as hub and spoke but backdoor on their bgp mpls edge routers when they prefer eigrp links for their back end datacenters <=> headquater connections for backup, database push pull, ftp, etc.... RIP AD is raised AD>170 for VSAT backup link as well since do not want VSAT take over external EIGRP routes.
Dustin
-------------- Original message --------------
> Hi Leigh,
>
> Yes, I actually implemented the BGP backdoor in a customer solution where
> they had multiple sites connected by both Frame-relay and Satellite. Over
> frame (the primary connection), they ran EIGRP. Over satellite, they went
> through an ISP, which supplied the customer a BGP confederation with each
> site using a different AS.
>
> With EIGRP being the primary routing protocol, it was necessary to use the
> backdoor command since the AD of internal EIGRP is higher than eBGP's AD.
> This way, the HQ had 2 different paths to the remotes - 1 via EIGRP on the
> frame, 1 via BGP and satellite. If the frame went down, HQ had the BGP
> prefix ready to go. Was there other ways to do the same thing? Yes, but
> this is what was implemented with success.
>
> This is a very simplistic explanation but I hope explains the use of the
> backdoor command.
>
> I know when I first read about the command, I too was stumped by it's use.
> Never thought I'd use it in a real-life scenario. HTH,
> Sean
> ----- Original Message -----
> From: "Leigh Harrison"
> To:
> Sent: Tuesday, August 16, 2005 5:18 PM
> Subject: BGP Backdoor
>
>
> > All,
> >
> > Is anybody actually using the bgp backdoor command in any real
> > situations ? Has anybody implemented it in the past ?
> >
> > I know what it's for, but I'm struggling to see why it would be used !
> >
> > LH
> >
> >
> > Leigh Harrison
> > Technical Consultant
> > Azzurri Communications
> > Castleton Mill,
> > Castleton Close,
> > Leeds,
> > LS12 2DS
> >
> > Email: Leigh.Harrison@azzu.co.uk
> > Mobile: 07989 605 806
> > Office: 0870 410 5868
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> > Web: www.azzu.co.uk
> >
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