The MPLS-OPS Archive[Date Prev][Date Next][Thread Prev][Thread Next] [Date Index][Thread Index][Author Index][Subject Index] Re: Advertising Routes learnt from PE to PE
On 5/14/03 10:51 AM, "Ferit Yegenoglu" <ferit@isocore.com> wrote: > > Sylvia, > > One possible scenario where this could happen is the hub-spoke BGP/MPLS > VPN. In this case the spoke PEs advertise their routes with a Route > Target value "Hub". The hub PE imports these routes and advertises them > to the CE router in the hub site. These routes are advertised across the > hub site and eventually back to the PE hub router via a different > interface. The PE hub router then readvertises these routes to the spoke > PEs with a Route Target value "Spoke" and a different VPN label. But to BGP, these "readvertised" prefixes are not the same. The rd will have changed. > > Ferit > > > >> -----Original Message----- >> From: owner-mpls@UU.NET [mailto:owner-mpls@UU.NET] On Behalf Of Sugar, >> Sylvia >> Sent: Wednesday, May 14, 2003 10:07 AM >> To: mpls-ops@mplsrc.com >> Cc: mpls@UU.NET >> Subject: Advertising Routes learnt from PE to PE >> >> Hi, >> WIll a PE router ever advertise a route it learns from another PE > router >> to some other PE router. >> I dont think it will ever do that as all the PE routers are IBGP peers > and >> would generally be in >> full mesh. >> >> Is there any case when this might happen .. i.e. a PE router > advertises a >> Route learnt from one PE >> to another PE. How can one do that .. because IMHO the label that will > be >> advertised by the former >> PE router will be for the PE router to which he sends the UPDATE. How > can >> this PE router advertise >> another PE router the same label? >> >> Moreover, if for some reason he has to .. does he assign a new label > and >> then advertise? >> >> ANy comments on this would be very helpful! >> >> Silviya Sugar >> >> __________________________________________________ >> Yahoo! Plus >> For a better Internet experience >> http://www.yahoo.co.uk/btoffer > -- Aamer Akhter / aa@cisco.com NSITE - cisco Systems ------- 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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