Re: MPLS Route Targets

Brad,

I see two questions combined in one post. The second question is picked up
and nicely answered by Adam - yes you can find those posts by just doing a
quick search. Marko, one of our readers and myself answered the same
question using different methods.

But the first question in your email (IMHO) still seems to be kind of
unanswered:

>I'd like to get on a P router and do a 'show ip bgp vpn4 all' to find all
the routes for a particular VPN Customer.. THe problem is that this may
not work right if
you have an export map...

What do you exactly mean?

Kambiz Agahian

CCIE Instructor/Consultant
M.Eng Telecom, CCIE# 25341, CCSI# 33326, MCSE, MCSA

On Thu, Aug 19, 2010 at 5:53 PM, Brad Edgeworth <edgie512_at_gmail.com> wrote:

> So I recently learned that 'route distinguishers' are slightly different
> from route-tags. When I troubleshoot MPLS route issues, I'd like to get
> on
> a P router and do a 'show ip bgp vpn4 all' to find all the routes for a
> particular VPN Customer.. THe problem is that this may not work right if
> you have an export map. Is there another command to will show all the
> route-targets with each route?
>
> Example Usage:
>
> R1 (CE) -- R2(PE) -- R3 (P) -- R4 (PE --Not relevant from here on out.)
>
> R2 Config:
>
> Ip vrf VPN_B
> rd 100:2
> route-target import 100:2
> route-target export 100:2
> export-map CHANGE_ROUTE_TARGET
>
> route-map CHANGE_ROUTE_TARGET permit 10
> match ip address prefix PRE_CHANGE_RT
> set extcommunity rt 100:200
>
> route-map CHANGE_ROUTE_TARGET permit 20
>
> ip prefix-list PRE_CHANGE_RT permit 175.1.5.0/24
>
> router bgp 100
> no bgp default ipv4-unicast
> neighbor 150.1.3,3 remote-as 100
> neighbor 150.1.3.3 update-source Loopback0
> !
> address-family vpnv4
> neighbor 150.1.3.3 activate
> neighbor 150.1.3.3 send-community extended
>
> address-family ipv4 vrf VPN_A
> redistribute connected
> redistribute ospf 10 vrf VPN_A
> no synchronization
>
>
> Ideally I'd like to find the command (if it exists) that will dump out all
> the route-targets riding inside the MPLS VPN similar to combining these two
> statements:
>
> Rack1R3# show ip bgp vpn4 all
> Network Next Hop Metric LocPrf Weight Path
> Route Distinguisher: *100:5* (default for vrf VPN_A)
> *>i175.1.1.0/24 150.1.2.2 0 100 0 ?
> *>i175.1.2.0/24 150.1.2.2 0 100 0 ?
> *>i175.1.3.0/24 150.1.2.2 1 100 0 ?
> *>i175.1.4.0/24 150.1.2.2 0 100 0 ?
> **>i175.1.5.0/32 150.1.2.2 2 100 0 ?*
>
> Rack1R3#show ip bgp vpn all 175.1.5.0
> BGP routing table entry for 100:5:175.1.5.0/24, version 39
> Paths: (1 available, best #1, table VPN_A)
> Advertised to update-groups:
> 1
> Local
> 0.0.0.0 from 0.0.0.0 (150.1.3.3)
> Origin incomplete, metric 0, localpref 100, weight 32768, valid,
> sourced, best
> Extended Community: RT:100:200 OSPF DOMAIN ID:0x0005:0x000000050200
> OSPF RT:0.0.0.1:2:0 OSPF ROUTER ID:150.1.3.3:0
> mpls labels in/out 21/aggregate(VPN_A)
>
>
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Received on Thu Aug 19 2010 - 20:35:47 ART