From: topgun topgun (topgunrs1@yahoo.com.sg)
Date: Fri Jan 13 2006 - 10:08:35 GMT-3
Hi Peter,
The problem is when the R1 link to L3 switch is down, the R1 will still need to reach 9.9.9.9 and 99.99.99.99. I can't filter the routes coming in from MPLS (which is sent by R2). At this time, there is 9.9.9.9 and 99.99.99.99 BGP routes
When I bring up the R1 link to L3, the eigrp is formed. But my R1 still prefer BGP routes. This is not desirable.
I tried using distance command for EIGRP routes in BGP protocol, and seem ok. Thanks to Gustavo's suggestion... :)
e.g
router bgp 65007
distance 171 remote MPLS interface 0.0.0.0 9
access-list 9 permit 9.9.9.9
access-list 9 permit 99.99.99.99
Any comment in using this distance command in BGP?
Thanks
Top
Peter McCreesh <petermccreesh@gmail.com> wrote:
Hi Top,
would it be an option to filter your own nets (9.9.9.9 and 99.99.99.99) out
of the BGP updates coming in from the MPLS cloud. You could then do a soft
reset on your BGP neighbor so the peering will stay up but your networks
should then "disappear" from the BGP updates coming in to you. Probably best
to do this on both R1 and R2
I hope i'm understanding your problem OK
..Pete
On 1/13/06, topgun topgun wrote:
>
> Hi all,
>
> I am having some design issue and would like to seek some advise.
>
> I have 2 routers, and their WAN link are connected to MPLS running BGP.
> Their LAN are connected to different L3 switch running EIGRP. The 2 L3
> switch are connected and run EIGRP too.
>
> MPLS cloud -----------R1 -----------L3 switch
> I I
> I-------------------------R2 ----------- L3 switch
>
>
> R1 and R2 are two redistribution point; redistribute EIGRP to BGP and BGP
> to EIGRP.
>
> My EIGRP cloud (L3 switches) has internal and external network, say
> 9.9.9.9 (internal) and 99.99.99.99 (external)
>
> R1 will prefer both 9.9.9.9 and 99.99.99.99 via L3 switch, and as such, R2
> will be via MPLS cloud (AD BGP 20 as compared to EIGRP 90 and 170).
> I want R2 to use L3 as the gateway like R1.
>
> Distance cannot be used as it can't work for external eigrp routes.
> bgp backdoor cannot work as I have to clear the ip bgp first.
>
> Appreciate your help.
>
> Thanks
>
> Top
>
>
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