The MPLS-OPS Archive[Date Prev][Date Next][Thread Prev][Thread Next] [Date Index][Thread Index][Author Index][Subject Index] Re: REG: Filtering of MPLS VPN routes
well yes.... for starters can u please tell me what ORF means? and how does cisco carry out BGP updates for multiple VPNs? dont u use route distinguishers? as proposed in RFC2547 ? ----- Original Message ----- From: Rajiv Asati <rajiva@cisco.com> To: alok <alok.dube@apara.com> Cc: Joseph Anthony <tonyjoe20002002@yahoo.co.in>; <rogerw@nordlink.com>; <mpls-ops@mplsrc.com> Sent: Monday, October 14, 2002 1:14 AM Subject: Re: [MPLS-OPS]: REG: Filtering of MPLS VPN routes Alok, At 10:29 AM 10/13/2002, alok wrote: >have been following this thread for a while so ...as i started getting >lost, i thought id ask a question.... > >wouldnt RRs be "per vrf based"? RR typically does not have any VRF configured. Are you referring to any other implementation ? From my understanding, Joseph was referring to extcomm based filtering on RR. Since he mentioned IOS CLI "bgp rr-group", I assumed he was referring to Cisco's implementation. Cheers, Rajiv >so in that case wudnt the vrf be assoicated with a "RD" flag...? > >how would ever spill over routes at all...i guess u mean "spill over >routes of other VPNs".... then the answer is you wont coz the NLRIs have >the RD field indicating which VPN the route belongs too.... > >so i doubt if u will ever need filters at all..... >for this case...unless u want to block certain routes in the same VPN... > >unless cisco does something different from "RDs"...havent done MPLS VPNs >on cisco but only junipers and zebra etc..so am not sure on this... > >-rgds >Alok >>----- Original Message ----- >>From: <mailto:tonyjoe20002002@yahoo.co.in>Joseph Anthony >>To: <mailto:rajiva@cisco.com>Rajiv Asati ; >><mailto:rogerw@nordlink.com>rogerw@nordlink.com >>Cc: <mailto:mpls-ops@mplsrc.com>mpls-ops@mplsrc.com >>Sent: Saturday, October 12, 2002 8:23 PM >>Subject: Re: [MPLS-OPS]: REG: Filtering of MPLS VPN routes >> >> Hi All, >> >>Thanks for all the inputs. I do have some questions in regard to >>Route-Filtering pertaining to Route Reflectors configurations in an MPLS >>VPN environment. Assuming the following scenario - >> >>Now while using Extended community based filtering by means of the ORF >>for route filtering. My question is as follows - >> >>1. In a partitioned RR setup, should all the RR clients and RR server >>have the extended community list and bgp-rr group configured on them, in >>order to facilitate both outbound and inbound filtering (dynamic). >> >>Assuming I have 2 RR's, each servicing a set of VPN's. Now in a situation >>in which an existing PE router suddenly needs to service a VPN, to which >>it has not provided routes previously, I understand that we would need to >>have the PE router establish an additional session to the other >>Route-reflector, which is currently reflecting routes to its clients for >>the particular VPN. This requires filtering to happen at the PE, wherein >>the PE should not spill over unwanted VPN routes to either of the RR's. >>Now while using Extended community based filtering by means of the ORF >>for route filtering. My question is as follows - >> >>1. How would the same work here? Any sample config will be greatly >>appreciated. >> >>Thanks in advance, >> >>Tony. >> >> >> >>Yahoo! Properties Special Buy, sell, rent...your flat, or even post an ad ------- The MPLS-OPS Mailing List Subscribe/Unsubscribe: http://www.mplsrc.com/mplsops.shtml Archive: http://www.mplsrc.com/mpls-ops_archive.shtml
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