RE: MPLS VPN Related Query

Thanks Brian.
Your expert reply like this are always appreciated.

Regards,
Kalpesh

----------------------------------------
> From: bdennis_at_ine.com
> To: kalpeshchheda_at_live.com; mothafungla_at_gmail.com
> CC: ccielab_at_groupstudy.com; yuribank_at_gmail.com
> Date: Thu, 7 Mar 2013 12:22:16 -0600
> Subject: Re: MPLS VPN Related Query
>
> By default you do not keep VPNv4 routes if you do not import them unless
> you are a route-reflector for VPNv4. The message you showed below "DENIED
> due to: extended community not supported" is the router saying that it
> received a VPNV4 route but the RT (route target) wasn't one that it's
> importing. Ideally it would say "DENIED due to: Route Target Not
> Imported". The logic for not keeping the route is: why keep a route if
> you aren't using it (not importing it) and can't advertise to anyone
> (learned via iBGP and you aren't a RR for VPNv4 or no eBGP VPNv4 peers)?
>
> If you want R3 to keep all VPNv4 routes even if it's not importing them
> then use the "no bgp default route-target filter" command. A time when
> this command is needed is when you're doing inter-AS VPNv4 and you learn a
> route via iBGP but not importing and want to advertise the route to a
> VPNv4 eBGP peer (see link below).
>
> http://www.cisco.com/en/US/docs/ios/mpls/configuration/guide/mp_vpn_connect
> _asbr_ps6922_TSD_Products_Configuration_Guide_Chapter.html
>
>
> --
> Brian Dennis, CCIEx5 #2210 (R&S/ISP-Dial/Security/SP/Voice)
> bdennis_at_ine.com
>
> INE, Inc.
> http://www.INE.com
>
>
>
>
> On 3/7/13 2:35 AM, "Kalpesh Chheda" <kalpeshchheda_at_live.com> wrote:
>
> >Ya See this
> >
> >*Mar 7 07:26:22.653: BGP(4): 2.2.2.2 rcvd 1:1:10.0.7.0/24, label 21 --
> >DENIED due to: extended community not supported;
> >
> >
> >----------------------------------------
> >> CC: ccielab_at_groupstudy.com
> >> From: mothafungla_at_gmail.com
> >> Subject: Re: MPLS VPN Related Query
> >> Date: Thu, 7 Mar 2013 07:17:35 +0000
> >> To: kalpeshchheda_at_live.com
> >>
> >> Does the debug ip bgp updates pick this up i.e denied due to
> >>
> >> --
> >> BR
> >>
> >> Sent from my iPhone on 3
> >>
> >> On 7 Mar 2013, at 07:09, Kalpesh Chheda <kalpeshchheda_at_live.com> wrote:
> >>
> >> > Completely got that. p??
> >> >
> >> >
> >> > Thanks Yuri.
> >> > _______________________________
> >> >> Date: Wed, 6 Mar 2013 23:01:50 -0800
> >> >> Subject: Re: MPLS VPN Related Query
> >> >> From: yuribank_at_gmail.com
> >> >> To: kalpeshchheda_at_live.com
> >> >>
> >> >> Sorry, meant that I meant 'R2 by its virtue of its RR config'
> >> >>
> >> >> -Yuri
> >> >>
> >> >> On Wed, Mar 6, 2013 at 10:57 PM, Yuri Bank
> >> >> <yuribank_at_gmail.com<mailto:yuribank_at_gmail.com>> wrote:
> >> >> VPNv4 prefixes that do not match import filters for any configured
> >>VRF
> >> >> will get filtered by default. In certain situations, such as on
> >> >> route-reflectors, this will cause issues.
> >> >>
> >> >> You can disable the behavior with:
> >> >>
> >> >> 'no bgp default route-target filter'
> >> >>
> >> >> Try configuring that on R3 (I'm assuming it is disabled by on R1 by
> >> >> virtue of its RR configuration).
> >> >>
> >> >> -Yuri
> >> >>
> >> >> -
> >> >> On Wed, Mar 6, 2013 at 10:34 PM, Kalpesh Chheda
> >> >> <kalpeshchheda_at_live.com<mailto:kalpeshchheda_at_live.com>> wrote:
> >> >> I have 3 routers connected serially. All three routers are PE.
> >> >>
> >> >> R1 ---- R2 ---- R3
> >> >>
> >> >> R1 is exporting some routes and R3 is importing that routes. R2 and
> >>R3
> >> >> are able to see vpnv4 routes in there vpnv4 table.
> >> >>
> >> >> But if R3 stops importing routes from R1 in to is VRF table. Routes
> >>are
> >> >> not even seen in its VPNv4 table. why?
> >> >>
> >> >> Because R2 have that VPNv4 routes by R1 in its table whether it is
> >> >> importing or not. p 5
> >> >>
> >> >>
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Received on Fri Mar 08 2013 - 09:21:38 ART