The MPLS WG Archive[Date Prev][Date Next][Thread Prev][Thread Next] [Date Index][Thread Index][Author Index][Subject Index] [mpls] LDP Multicast to WG Document
Hi Shuying, We have some ideas on how to minimize the traffic loss during switchover, but I'm not sure if we can prevent it without some kind of FRR mechanism. Thx, Ice. BTW, I support make this a WG document. On Feb 9, 2006, at 7:56 AM, liushuying wrote: > Hi folks, > I support this draft becoming a WG document. > > However,i am about to ask a question. > > 1) 2.3.2.4. Upstream LSR change > > If, for a given node Z participating in a P2MP LSP <X, Y>, the > upstream LSR changes, say from U to U', then Z MUST update its > forwarding state by deleting the state for label L, allocating a new > label, L', for <X,Y>, and installing the forwarding state for L'. > In > addition Z MUST send a Label Map <X, Y, L'> to U' and send a Label > Withdraw <X, Y, L> to U. > > The question: > When a large quantity of P2MP LSPs exists in MPLS networks, > if unicast routing information changes, there may be many LSRs > whose upstream LSRs have changed in every P2MP LSP, each of them > sends a Label Withdraw message > to its old upstream LSR and a Label Map message to its new upstream > LSR at the same time, > so the load of every LSR will enhance sharply and last for a long > time. > As a result, the time of traffic disruption in every P2MP LSP will > last for a long time, > and so many packets will be lost. > > Thanks > Shuying Liu > > > ----- Original Message ----- >> Date: Mon, 06 Feb 2006 07:50:51 -0500 >> From: George Swallow <swallow@cisco.com> >> Subject: [mpls] LDP Multicast to WG Document >> To: mpls@ietf.org >> Message-ID: <20060206125051.3E3BD17B472@SwallowPB.local> >> >> It has been requested that >> >> Label Distribution Protocol Extensions for Point-to-Multipoint and >> Multipoint-to-Multipoint Label Switched Paths >> draft-minei-wijnands-mpls-ldp-p2mp-00 >> >> become a MPLS WG document. >> >> Please indicate your support or objections by the end of this week. >> >> Thanks, >> >> ...George >> >> ====================================================================== >> == >> George Swallow Cisco Systems (978) >> 936-1398 >> 1414 Massachusetts Avenue >> Boxborough, MA 01719 >> >> >> >> >> >> ------------------------------ >> >> _______________________________________________ >> mpls mailing list >> mpls@lists.ietf.org >> https://www1.ietf.org/mailman/listinfo/mpls >> _______________________________________________ mpls mailing list mpls@lists.ietf.org https://www1.ietf.org/mailman/listinfo/mpls
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