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Cell Relay Retreat>MPLS WG Archive>month:2003-Mar> msg00346



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[PWE3] MPLS PID

  • From: Shahram Davari <Shahram_Davari@pmc-sierra.com>
  • Date: Thu, 27 Mar 2003 07:06:49 -0800
  • Cc: "'Thomas D. Nadeau'" <tnadeau@lucidvision.com>, "'George Swallow'" <swallow@cisco.com>, "W. Mark Townsley" <townsley@cisco.com>, "Andrew G. Malis" <Andy.Malis@vivacenetworks.com>, "'mpls@uu.net'" <mpls@UU.NET>, tnadeau@cisco.com

>I don't feel obligated to answer nonsense questions.  No one has
>proposed putting a CRC in the PID.

First of all I meant computing CRC over the first 20 byte of payload header
and comparing it to the suspected IP CRC in octets 11 and 12 of the payload.
If they match then it is IPv4, if not it is something else (similar procedure for IPv6)

Secondly I am proposing it now. Is there a problem? I feel my procedure is far superior to just checking 4 bits to decide whether the payload is IP or not. 

>
>Curtis
>
>ps - "requiring [..] not to produce a valid CRC" doesn't even parse in
>english so your question is complete nonsense.


It makes perfect sense if you understand my proposal. I think you need to talk to Alia, since she could parse it correctly :)

-Shahram