Hi Shahram, It may be ok as long as the HWs are incrementally recalculating it. However, if its being done afresh then we have an issue. I don't see how the HW behavior can be mandated in a spec.
Cheers, Manav > -----Original Message----- > From: Shahram Davari [mailto:[email protected]] > Sent: Friday, January 21, 2011 4.59 AM > To: Bhatia, Manav (Manav); [email protected] > Subject: RE: UDP checksum > > 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
