From: Scott Morris (smorris@internetworkexpert.com)
Date: Tue Mar 03 2009 - 19:11:40 ARST
The short question I would ask you... Unless your P router is acting as a
route reflector for VPNv4 (at which point the ARF is automatically
disabled), why in the world would you peer BGP, specifically that address
family, with your P routers?
PE to PE is where you want things.
As long as you have an LSP between the PE's, all the P router needs to care
about is that next-hop reachability to reach the PE ID. No VRF-specific
information is necessary and it should NOT be seeing the vpn labels. The
problem is that it's trying, then not doing very well until you disable ARF!
Take your P router out of the equation unless you have some burning issue to
need it.
Just my two cents.
Scott
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Peter Svidler
Sent: Tuesday, March 03, 2009 3:42 PM
To: Ahamed Sadayan-Abdul-Hutha (asadayan)
Cc: ccielab@groupstudy.com
Subject: RE: MPLS VPN simple question
Hi Ahmed ,
thanks for your answer .
my concern is that when i disable the default vpnv4 route-filter , the
prefixes are installed on the P router LFIB ( the mpls forwarding table )
even
though there is no VRF created on this router , the only difference is that
those prefixes are installed in the mpls forwarding table with the RD
appended to the prefixes .
if you have a setup you can try it ..it is always like that ..my question is
why?? ..should not those prefixes only remain the vpnv4 table ??
--- On Tue, 3/3/09, Ahamed Sadayan-Abdul-Hutha (asadayan)
<asadayan@cisco.com>
wrote:
From: Ahamed Sadayan-Abdul-Hutha (asadayan) <asadayan@cisco.com>
Subject: RE: MPLS VPN simple question
To: "Peter Svidler" <doubleccie@yahoo.com>
Date: Tuesday, March 3, 2009, 3:34 PM
Hi Peter,
The VRF routes learned from the remote PE's can be seen using the
command sh ip ro vrf < vrf name>.
If you disable route-target filter, you will see the vpnv4 prefixes on
the P router also, That is way to import all the vrf routes if you don't
have any vrf configured.
But you should see only on vpnv4 tabel only not on the mpls tabel.
Unless if you are leaking those routes to the global tabel.
Thanks
Ahamed
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Peter Svidler
Sent: Tuesday, March 03, 2009 2:18 AM
To: ccielab@groupstudy.com
Subject: MPLS VPN simple question
folks,
I have simple setup of 3 routers of a service provider, 2 PE's and 1 P
router
on the PE's there is one VRF created and receiving some prefixes from
CEs
when i establish the VPNv4 session inside the provider network , the
prefixes appears in the MPLS table with [v] which means it is inisde the
VRF and that is ok .
my question is , why the other end prefixes does not appear on the PE ?
also when i disable the route-target filter option on the P router , the
VPN prefixes of both PE's appears in the MPLS table ...shoud not it
remain in the
vpnv4 table only ??
thanks
Blogs and organic groups at http://www.ccie.net
This archive was generated by hypermail 2.1.4 : Mon Apr 06 2009 - 06:44:03 ART