The MPLS WG Archive[Date Prev][Date Next][Thread Prev][Thread Next] [Date Index][Thread Index][Author Index][Subject Index] [PWE3] MPLS PID
Shahram Davari wrote: > I agree with Lloyd. Sniffing IP packets in the middle of an MPLS network is fundamentally wrong, and is impossible to do for all ECMP implementations such as the one that I described > in earlier emails in which both the first nibble and the CRC are used to detect IP. > Shahram, It might be fundamentally wrong but this is deployed today , and we run our hole network based on this little point. It seems to work fine for a network that transport 90gb/s to 100Gb/s of actual traffic. So if we put the theory, and layer arguments aside , what is the issue with determining that a particular flow is not IP ( assuming IP = 99% of traffic ) ? Luca It might be fundamentally wrong > The best way to solve this problem is to do ECMP only based on label stack. Doing so should be > easier than introducing new standard. > > -Shahram > > > >>-----Original Message----- >>From: Lloyd Wood [mailto:l.wood@eim.surrey.ac.uk] >>Sent: Sunday, March 30, 2003 6:11 PM >>To: Eric Rosen >>Cc: jeremy.de_clercq@alcatel.be; David Allan; 'Scott W Brim'; >>pwe3@ietf.org; mpls@UU.NET >>Subject: Re: [PWE3] MPLS PID >> >> >>On Thu, 27 Mar 2003, Eric Rosen wrote: >> >> >>>1. The only reason for a PID field in MPLS and/or >> >>PWE3 is to allow >> >>> intermediate routers to determine whether a particular >> >>MPLS payload is an >> >>> IP packet or not. >> >>which is a layer violation, and shouldn't be done. >> >> >>> There are a number of reasons why this is useful, and >> >>no one has argued >> >>> that this is not useful. >> >>not appropriate, more like. >> >>if you're going to sniff for an IP packet (so you can sniff TCP/UDP or >>higher) you might want to ask why you even have any form of mpls >>label stack in there in the first place. >> >>if you're not separating out your ip flows via explicit mpls label, >>why not? >> >>L. >> >><http://www.ee.surrey.ac.uk/Personal/L.Wood/><L.Wood@ee.surrey.ac.uk> >>_______________________________________________ >>pwe3 mailing list >>pwe3@ietf.org >>https://www1.ietf.org/mailman/listinfo/pwe3 >> > > _______________________________________________ > pwe3 mailing list > pwe3@ietf.org > https://www1.ietf.org/mailman/listinfo/pwe3 >
|
|