From: Peter McCreesh (petermccreesh@gmail.com)
Date: Fri Jan 13 2006 - 15:44:24 GMT-3
Hi Scott,
Does this solution assume that you have control of the BGP router(s) in the
MPLS cloud.
I was working on this as if it was the SP who owned the MPLS routers and as
a result, weren't allowed to be changed.
I may be misunderstanding however. (I know you have no more info than I do
but what i'm getting at is the solution(s) you mentioned. They would be
implemented on the MPLS BGP router(s)??)
Thanks a lot,
Pete
On 1/13/06, Scott Morris <swm@emanon.com> wrote:
>
> You could also consider things inside BGP like adding a bogus private AS
> to
> the path, or setting a community and then filtering that on the other
> side....
>
> Scott
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> topgun topgun
> Sent: Friday, January 13, 2006 8:20 AM
> To: topgun topgun; Peter McCreesh
> Cc: ccielab@groupstudy.com
> Subject: Re: Redistribution BGP-EIGRP
>
> Hi all,
>
> Just having this thought that BGP distance might not be a good solution,
> as I have about 300-400 EIGRP routes inside the L3.
>
> And also if new routes are added or coming in from the L3, does it mean
> I
> have to add the new subnet into the access-list.
>
> Is there a better way to resolve this issue?
>
> Thanks in advnace.
>
> Top
>
> topgun topgun <topgunrs1@yahoo.com.sg> wrote:
> 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
> 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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