RE: RR & metrics not being propergated to ebgp peer from RR

Apply the route-map out to the neighbor, from the CE to the PE.

Brian McGahan, CCIE #8593 (R&S/SP/Security), CCDE #2013::13
bmcgahan_at_INE.com<mailto:bmcgahan_at_INE.com>

Internetwork Expert, Inc.
http://www.INE.com<http://www.ine.com/>

From: Tony Singh [mailto:mothafungla_at_gmail.com]
Sent: Thursday, February 28, 2013 5:47 PM
To: Brian McGahan
Cc: Brian Dennis; Cisco certification
Subject: Re: RR & metrics not being propergated to ebgp peer from RR client

Hi Brian

In initial post show ip bgp on PE it didn't match^^

here are a few prefixes where after resetting the peering it sends an update
to the ebgp peer

if I read it correctly it sends an update on the two prefixes with MED of 200

*Feb 28 23:31:00.578: BGP(0): 192.168.58.226 send UPDATE (prepend, chgflags:
0x820) 1.1.1.0/26<http://1.1.1.0/26>, next 192.168.58.225, metric 200,
extended community
*Feb 28 23:31:00.578: BGP(0): 192.168.58.226 send UPDATE (prepend, chgflags:
0x820) 2.2.2.0/26<http://2.2.2.0/26>, next 192.168.58.225, metric 200,
extended community

network 1.1.1.0 mask 255.255.255.192 route-map Not-Prefer
network 2.2.2.0 mask 255.255.255.192 route-map Not-Prefer

route-map Not-Prefer permit 10
 set metric 200
 set local-preference 100
route-map Prefer permit 10
 set metric 100
 set local-preference 200

on PE

*Feb 28 23:46:53.850: BGP(0): 192.168.58.225 rcvd
1.1.1.0/26<http://1.1.1.0/26>
*Feb 28 23:46:53.850: BGP(0): 192.168.58.225 rcvd
2.2.2.0/26<http://2.2.2.0/26>

sh ip bgp on PE is same as first post

Tony

On 28 February 2013 23:10, Brian McGahan
<bmcgahan_at_ine.com<mailto:bmcgahan_at_ine.com>> wrote:
Setting the MED manually should work. What does your config setting the MED
look like on the CE? "show ip bgp" may not show you the value that you are
setting outbound, you may need to look at the "debug ip bgp update" to see the
attribute actually being set, or if you can get the "show ip bgp" output from
the PE side you'll be able to tell if the attribute is there.

Brian McGahan, CCIE #8593 (R&S/SP/Security), CCDE #2013::13
bmcgahan_at_INE.com<mailto:bmcgahan_at_INE.com>

Internetwork Expert, Inc.
http://www.INE.com<http://www.ine.com/>

From: Tony Singh [mailto:mothafungla_at_gmail.com<mailto:mothafungla_at_gmail.com>]
Sent: Thursday, February 28, 2013 4:24 PM
To: Brian McGahan
Cc: Brian Dennis; Cisco certification

Subject: Re: RR & metrics not being propergated to ebgp peer from RR client

Hi Brian

Thanks but I have already tried this i.e same metrics/route-maps from CE
doesn't work man!

Can't originate the prefixes on CE as I need them to come from behind the CE
no IGP being used & don't really want to use one if I can get away with it..

BR

Tony

On 28 February 2013 22:15, Brian McGahan
<bmcgahan_at_ine.com<mailto:bmcgahan_at_ine.com>> wrote:
Originate the prefixes on the CE so that the IGP metric will be copied to MED.
If that's not an option then you'll have to manually set the MED outbound on
the CE towards the PE if you want to get it to propagate.

HTH,

Brian McGahan, CCIE #8593 (R&S/SP/Security), CCDE #2013::13
bmcgahan_at_INE.com<mailto:bmcgahan_at_INE.com>

Internetwork Expert, Inc.
http://www.INE.com

-----Original Message-----
From: nobody_at_groupstudy.com<mailto:nobody_at_groupstudy.com>
[mailto:nobody_at_groupstudy.com<mailto:nobody_at_groupstudy.com>] On Behalf Of Tony
Singh
Sent: Thursday, February 28, 2013 2:36 PM
To: Brian Dennis
Cc: Cisco certification
Subject: Re: RR & metrics not being propergated to ebgp peer from RR client

Ok thanks for setting me straight Brain, what would be the best way to achieve
the desired goal in that case or is it not possible

On 28 February 2013 20:25, Brian Dennis
<bdennis_at_ine.com<mailto:bdennis_at_ine.com>> wrote:

> MED is a non-transitive attribute which means in your case if the CE
> learns a path via iBGP you can't pass the MED for that path to an eBGP
> peer. If the CE originated the path into BGP itself then it would be
> passed to its eBGP peer (PE).
>
> --
> Brian Dennis, CCIEx5 #2210 (R&S/ISP-Dial/Security/SP/Voice)
> bdennis_at_ine.com<mailto:bdennis_at_ine.com>
>
> INE, Inc.
> http://www.INE.com
>
>
>
>
> On 2/28/13 3:05 PM, "Tony Singh"
<mothafungla_at_gmail.com<mailto:mothafungla_at_gmail.com>> wrote:
>
> >Hi Experts
> >
> >I may be missing some fundamental here but say the following
> >
> >SW>CE>PE
> >
> >SW is RR but also announcing several subnets into bgp process which
> >reference preferred metrics
> >
> >these metric are advertised out to CE, CE see's these and advertises
> >these metrics out to PE but PE does not see these metrics in bgp rib....?
> >
> >anything im doing wrong....
> >
> >
> >
> >CE#$ ipv4 unicast neighbors x.x.x.x advertised-routes BGP table
> >version is 20, local router ID is x.x.x.x Status codes: s suppressed,
> >d damped, h history, * valid, > best, i - internal,
> > r RIB-failure, S Stale
> >Origin codes: i - IGP, e - EGP, ? - incomplete
> >
> > Network Next Hop Metric LocPrf Weight Path
> >*>ix.x.x.x x.x.x.x 200 100 0 i
> >*>ix.x.x.x x.x.x.x 200 100 0 i
> >*>ix.x.x.x
> > x.x.x.x 200 100 0 i
> >*>ix.x.x.x x.x.x.x 100 200 0 i
> >*>ix.x.x.x
> > x.x.x.x 100 200 0 i
> >*> x.x.x.x
> > 0.0.0.0 100 200 32768 i
> >*> x.x.x.x
> > 0.0.0.0 100 200 32768 i
> >*> x.x.x.x
> > 0.0.0.0 100 200 32768 i
> >*>ix.x.x.x
> > x.x.x.x 100 200 0 i
> >
> >Total number of prefixes 9
> >
> >
> >
> >PE#show ip bgp
> >BGP table version is 28, local router ID is x.x.x.x Status codes: s
> >suppressed, d damped, h history, * valid, > best, i - internal,
> > r RIB-failure, S Stale
> >Origin codes: i - IGP, e - EGP, ? - incomplete
> >
> > Network Next Hop Metric LocPrf Weight Path
> >* x.x.x.x x.x.x.x 0 xxxxx i
> >*> x.x.x.x 0 xxxxx i
> >* x.x.x.x x.x.x.x 0 xxxxx i
> >*> x.x.x.x 0 xxxxx i
> >* x.x.x.x
> > x.x.x.x 0 xxxxx i
> >*> x.x.x.x 0 xxxxx i
> >* x.x.x.x x.x.x.x 0 xxxxx i
> >*> x.x.x.x 0 xxxxx i
> >* x.x.x.x
> > x.x.x.x 100 0 xxxxx i
> >* x.x.x.x 0 xxxxx i
> >*> 0.0.0.0 0 xxxxx i
> >* x.x.x.x
> > x.x.x.x 0 xxxxx i
> >* x.x.x.x 100 0 xxxxx i
> >*> 0.0.0.0 0 xxxxx i
> >
> >
> >Blogs and organic groups at http://www.ccie.net
> >
> >_____________________________________________________________________
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Received on Thu Feb 28 2013 - 18:01:00 ART