Re: oversized-header-chains: Receipt of illegal first-fragments

2012-07-21 Thread Bill Jouris
--- On Thu, 7/19/12, Fernando Gont wrote: >>On 07/19/2012 07:33 PM, RJ Atkinson wrote: >> I think the requirement that a packet that violates the >> proposed oversized-heacer-chain rule be dropped "silently" >> is too strong and lacks operational flexibility. > >FWIW, when I said "sil

Re: oversized-header-chains: Receipt of illegal first-fragments

2012-07-19 Thread Fernando Gont
Hi, Ran, On 07/19/2012 09:04 PM, RJ Atkinson wrote: >> Should we make this latter bit (about this being configurable) >> a MAY, or would you prefer to have non-RFC2119 language? > > I believe this configurability is really desirable. > It isn't a big burden for an implementer, as it is > simply a

Re: oversized-header-chains: Receipt of illegal first-fragments

2012-07-19 Thread RJ Atkinson
On 19 Jul 2012, at 15:20 , Fernando Gont wrote: >> 1) I'd prefer this draft say that such illegal packets MUST >> be dropped, but then also say that the device dropping the >> packet MAY send an ICMPv6 Parameter Problem control message >> back to the (alleged) sending node. A brief sent

Re: oversized-header-chains: Receipt of illegal first-fragments

2012-07-19 Thread Fernando Gont
Hi, Ran, As always, thanks so much for your feedback and elaborated comments. Please find my response in-line... On 07/19/2012 07:33 PM, RJ Atkinson wrote: > I think the requirement that a packet that violates the > proposed oversized-heacer-chain rule be dropped "silently" > is too strong and l

Re: oversized-header-chains: Receipt of illegal first-fragments

2012-07-19 Thread RJ Atkinson
OPINION/BELIEF: I concur with Fred Baker's analysis of "SHOULD" versus "MUST". I think the requirement that a packet that violates the proposed oversized-heacer-chain rule be dropped "silently" is too strong and lacks operational flexibility. A device ought to be allowed, but not required, to

Re: oversized-header-chains: Receipt of illegal first-fragments

2012-07-19 Thread Fernando Gont
Hi, Eric, On 07/19/2012 07:21 AM, Eric Vyncke (evyncke) wrote: > Two comments: 1) for the transition period (when we could perhaps see > those packets -- even if I have yet to see one!), 'silently' is > perhaps too strong, I would suggest at the bare minimum a dropped > packet counter (else operat

RE: oversized-header-chains: Receipt of illegal first-fragments

2012-07-18 Thread Eric Vyncke (evyncke)
e it helps -éric > -Original Message- > From: ipv6-boun...@ietf.org [mailto:ipv6-boun...@ietf.org] On Behalf Of > Fernando Gont > Sent: mercredi 18 juillet 2012 22:37 > To: ipv6@ietf.org > Subject: oversized-header-chains: Receipt of illegal first-fragments > > Folks

Re: oversized-header-chains: Receipt of illegal first-fragments

2012-07-18 Thread Fernando Gont
Hi, Fred, Thanks so much for your prompt response. Please find my comments in-line... On 07/18/2012 10:03 PM, Fred Baker (fred) wrote: >> "A host that receives a first-fragment that fails to include the >> entire IPv6 header chain MUST silently drop the aforementioned >> fragment". >> >> Clearly

Re: oversized-header-chains: Receipt of illegal first-fragments

2012-07-18 Thread Fred Baker (fred)
On Jul 18, 2012, at 1:36 PM, Fernando Gont wrote: > Folks, > > There's one issue that came up during my recent exchange with Suresh on > which I'd like others (including Suresh) to weigh in: > > Since first-fragments that fail to include the entire header chain will > be illegal, I think it wou

Re: oversized-header-chains: Receipt of illegal first-fragments

2012-07-18 Thread Vishwas Manral
Hi Fernando, I think this is an essential message that needs to be added as part of the draft. Thanks, Vishwas On Wed, Jul 18, 2012 at 1:36 PM, Fernando Gont wrote: > Folks, > > There's one issue that came up during my recent exchange with Suresh on > which I'd like others (including Suresh) to

oversized-header-chains: Receipt of illegal first-fragments

2012-07-18 Thread Fernando Gont
Folks, There's one issue that came up during my recent exchange with Suresh on which I'd like others (including Suresh) to weigh in: Since first-fragments that fail to include the entire header chain will be illegal, I think it would be appropriate to include an additional requirement in draft-ie