From: David Luu (wicked01@xxxxxxxxxxxxx)
Date: Fri Jun 28 2002 - 16:18:04 GMT-3
people have reported in the past in this mailing list that when using the
12.1(5)T IOS, the backdoor command doesnt work
At 07:10 AM 6/28/2002 -0700, Annu Roopa wrote:
>Folks,
>
>First of all thanks to all who took time to reply.Here
>is what i observed.There are two ways to do it.Both do
>the same thing.
>
>The second way works and the backdoor STILL IS NOT
>WORKING AS EXPECTED.THE IOS verison is 12.1(5)T on all
>routers.
>
>1.Use the BGP back door on R2 using 'backdoor
>175.10.10.0' on r2. This is preferred way.
>
>This command tells BGP to force the preferred BGP path
>of 172.16.1.0 to AD=200 and considers the iGRP path
>with 100.But this is also considers the network 175.10
>as local and does not advertise it....assume a router
>connected to R10 with Ebgp.this router will not use
>this IGP link thru R2/R12 and instaed use the R10-r12
>link which is what is expected. Look into doyle 2 for
>more details.
>
>2.Use the Network command under BGP process as 'net
>175.10.10.0' on R2 as some said.This too works but
>unlike the above it advertises this path to R10 and
>its ext neighbors and they could be using the r2-r12
>IGP path which is not preferred. Refer Doyle II.
>
>Bcoz 175.10 is in the R2 BGP table it advertises it
>with network command and sets the Ad to 200 and
>prefers the IGRP path over eBGP path.
>
>Hope that helps. I have tried rebooting and
>re-intializing BGP no luck.MAYBE this is a bug or ???
>
>Anyone else with ideas.
>
>
>
>
>
>
>
>=====
>Thanks in advance for ur time and replies.
>Annu.
>
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