The MPLS WG Archive[Date Prev][Date Next][Thread Prev][Thread Next] [Date Index][Thread Index][Author Index][Subject Index] Does a labeled packet go through "Packet Filtering/Policy Routing/FilterBased Forwarding"?
Sorry for opening this old thread again after a long time.. David, In a few current or next gen boxes hw genarally has capability to look into the payload even for labelled traffic for load distribution purposes on aggr links etc right?? with regards, hkulk >From: David Charlap <David.Charlap@marconi.com> >To: IETF MPLS List <mpls@UU.NET> >Subject: Re: Does a labeled packet go through "Packet Filtering/Policy >Routing/Filter Based Forwarding"? >Date: Thu, 24 Oct 2002 12:42:00 -0400 > >Sachin Kalra wrote: >> >>A quick question. Does a labeled packet go through "Packet >>Filtering/Policy Routing/Filter Based Forwarding"? > >What would you have it filter on? A transit router should not make >forwarding decisions based on anything other than the topmost label. If >you start drilling down into the packet payload to make these decisions, >then why bother using MPLS at all? > >One of the key reasons for MPLS these days is the ability to optimize >traffic engineering. You will decide your route through the network when >you set up the LSP. The node at the LSP's ingress will decide which >packets to forward into which LSP. Once that decision is made, the packets >should not be examined again until they emerge from the other end of the >LSP. > >-- David _________________________________________________________________ The new MSN 8: smart spam protection and 2 months FREE* http://join.msn.com/?page=features/junkmail
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