Hi Manav, UDP checksum is usually not verified before updating the CF. After CF update it is incrementally recalculated. The end host will then verify the checksum for correctness.
Regards, Shahram -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Bhatia, Manav (Manav) Sent: Thursday, January 20, 2011 3:16 PM To: [email protected] Subject: [TICTOC] UDP checksum Hi, Are the LSRs acting as TCs expected to verify the checksum before they update the correction field? If no, then there is no point in these LSRs in updating the UDP checksum as they will "correct" the checksum when its recomputed after modifying the CF field. In this case wouldn't it make more sense to just update the checksum at the MPLS terminating point? I also think that updating the UDP checksum may be redundant as the LSRs are anyways verifying the outer ethernet checksum before accepting any packets. Any thoughts here? Cheers, Manav -- Manav Bhatia, IP Division, Alcatel-Lucent, Bangalore - India _______________________________________________ TICTOC mailing list [email protected] https://www.ietf.org/mailman/listinfo/tictoc _______________________________________________ TICTOC mailing list [email protected] https://www.ietf.org/mailman/listinfo/tictoc
