Re: [lisp] IPv6 UDP checksum issue

2009-08-03 Thread Lars Eggert
Hi, On 2009-8-3, at 1:15, Brian E Carpenter wrote: It seems to me that it would not violate the spirit of RFC2460 if we added a rule that stacks MUST follow the RFC2460 rule by default but MAY deviate from it for duly configured tunnel end points in routers (where router is strictly as defined

Re: [BEHAVE] UDP zero checksums and v4 to v6 translators

2009-08-03 Thread Rémi Després
Le 30 juil. 09 à 03:09, Christian Huitema a écrit : On 2009-07-29 19:43, Benny Amorsen wrote: Brian E Carpenter brian.e.carpen...@gmail.com writes: Er, do your routers do that when they throw away packets due to congestion? If a router throws away a packet due to congestion, there's a

Re: [BEHAVE] UDP zero checksums and v4 to v6 translators

2009-08-03 Thread Lars Eggert
Hi, On 2009-8-3, at 13:18, Rémi Després wrote: In view of the various arguments made, here is IMHO a good combination: ... - IPv6 hosts MAY accept UDP datagrams with zero checksum. I see no reason why allowing a UDP checksum of zero for router-to- router tunnels under specific

Re: [BEHAVE] UDP zero checksums and v4 to v6 translators

2009-08-03 Thread Pekka Savola
On Mon, 3 Aug 2009, Lars Eggert wrote: I see no reason why allowing a UDP checksum of zero for router-to-router tunnels under specific circumstances (existence of a payload checksum), which is what we've been discussing for AMT and LISP, motivates *any* changes for the host. As far as hosts as

Re: [BEHAVE] UDP zero checksums and v4 to v6 translators

2009-08-03 Thread Rémi Denis-Courmont
On Monday 03 August 2009 15:28:59 ext Pekka Savola wrote: On Mon, 3 Aug 2009, Lars Eggert wrote: I see no reason why allowing a UDP checksum of zero for router-to-router tunnels under specific circumstances (existence of a payload checksum), which is what we've been discussing for AMT and

Re: [BEHAVE] UDP zero checksums and v4 to v6 translators

2009-08-03 Thread Marshall Eubanks
On Aug 3, 2009, at 7:54 AM, Lars Eggert wrote: Hi, On 2009-8-3, at 13:18, Rémi Després wrote: In view of the various arguments made, here is IMHO a good combination: ... - IPv6 hosts MAY accept UDP datagrams with zero checksum. I see no reason why allowing a UDP checksum of zero for

Re: [BEHAVE] UDP zero checksums and v4 to v6 translators

2009-08-03 Thread Rémi Després
Le 3 août 09 à 13:54, Lars Eggert a écrit : Hi, On 2009-8-3, at 13:18, Rémi Després wrote: In view of the various arguments made, here is IMHO a good combination: ... - IPv6 hosts MAY accept UDP datagrams with zero checksum. I see no reason why allowing a UDP checksum of zero for

Re: [lisp] IPv6 UDP checksum issue

2009-08-03 Thread Margaret Wasserman
Hi Dino, On Jul 30, 2009, at 4:25 PM, Dino Farinacci wrote: Hi, Dino, On 2009-7-29, at 14:02, Dino Farinacci wrote: From a practical perspective, we prefer that a LISP encapsulator (ITR and PTR) not incurred additional work when encapsulating packets. could you share some data on how