Re: PMTUD and MTU < 1280

2011-07-20 Thread Philip Homburg
In your letter dated Wed, 20 Jul 2011 17:35:31 -0400 you wrote: >I am not sure the specs insist that an IPv6 implementation >must treat an ICMPv6 Packet-Too-Big for less than 1280 bytes >as "unrecoverable". (I haven't re-read the IPv6 specs recently.) Some services, like big DNS server cannot af

Re: /64 ND DoS

2011-07-20 Thread Thomas Narten
playing catchup ... Jared Mauch writes: > To (re)state the biggest design issue with NDP again, it's outlined > in 7.3 of the v6nd-enhance draft: > -- snip -- > 7.3. NDP Protocol Gratuitous NA >Per RFC 4861, section 7.2.5 and 7.2.6 [RFC4861] requires that >unsolicited neighbor advert

Re: I-D Action: draft-chown-6man-tokenised-ipv6-identifiers-00.txt

2011-07-20 Thread Brian E Carpenter
Hi, In some ways I'd rather defer discussion of this draft until 6renum has clarified the requirements somewhat. However, two comments for now: 1. I don't find that this draft, admittedly preliminary, clearly defines what a tokenised IID is. If it just means a configured IID, why not say so? 2.

RE: Optimization of RFC 4861 for Energy-aware networks

2011-07-20 Thread Samita Chakrabarti
Hi Rute, I will contribute, but do you have a specific deadline for us to send you comments? BR, Rute Sofia [[SC ] ] Thanks.If you provide comments in next few weeks, that will be good, I believe. -Samita On 07/19/2011 08:38 PM, Samita Chakrabarti wrote: Hello all: In 6lowpan workgroup,

Re: Optimization of RFC 4861 for Energy-aware networks

2011-07-20 Thread Rute Sofia
Hello Samita, I will contribute, but do you have a specific deadline for us to send you comments? BR, Rute Sofia On 07/19/2011 08:38 PM, Samita Chakrabarti wrote: Hello all: In 6lowpan workgroup, we developed draft-ietf-6lowpan-nd which provides optimization of IPv6 ND for IEEE802.15.4 dev

Re: PMTUD and MTU < 1280

2011-07-20 Thread james woodyatt
On Jul 20, 2011, at 14:35 , RJ Atkinson wrote: > One hopes IPv6 implementers will be tolerant of IPv6 MTUs below 1280 bytes, > because they do exist in the deployed world and aren't going away anytime > soon. Those hopes are not well placed. I am aware of at least one packet filter implementat

Re: PMTUD and MTU < 1280

2011-07-20 Thread RJ Atkinson
Earlier, Brian Carpenter wrote: > It's always been my understanding that an interface sending IPv6 packets > MUST implement some (unspecified) form of framentation and reassembly > *below layer 3* if the link MTU is less than 1280. In other words a > PTB for a packet of length 1280 is an unrecovera

Re: Fwd: New Version Notification for draft-nordmark-6man-impatient-nud-01.txt

2011-07-20 Thread Philip Homburg
In your letter dated Wed, 20 Jul 2011 10:17:51 -0700 you wrote: >> A few remarks about this draft: >> 1) It must be somewhere in RFC-4861, but it is not easy to find and it's >> probably best to help implementors here: if a NCE for a router transitio >ns >> to UNREACHABLE state and there ar

Re: Fwd: New Version Notification for draft-nordmark-6man-impatient-nud-01.txt

2011-07-20 Thread Erik Nordmark
On 7/20/11 9:17 AM, Philip Homburg wrote: In your letter dated Thu, 07 Jul 2011 13:41:41 -0700 you wrote: A new version of I-D, draft-nordmark-6man-impatient-nud-01.txt has been successfully submitted by Erik Nordmark and posted to the IETF repository. Thanks for your review. A few remarks a

Re: Fwd: New Version Notification for draft-nordmark-6man-impatient-nud-01.txt

2011-07-20 Thread Philip Homburg
In your letter dated Thu, 07 Jul 2011 13:41:41 -0700 you wrote: >A new version of I-D, draft-nordmark-6man-impatient-nud-01.txt has been >successfully submitted by Erik Nordmark and posted to the IETF repository. A few remarks about this draft: 1) It must be somewhere in RFC-4861, but it is not e

Re: PMTUD and MTU < 1280

2011-07-20 Thread Philip Homburg
In your letter dated Tue, 19 Jul 2011 22:28:03 -0700 you wrote: >On 7/19/11 6:02 PM, Brian E Carpenter wrote: >> For example, if you're tunneling IPv6 over an IPv4 network whose PMTU (to >> the other end of the tunnel) is, to take a random example, 576, the tunnel >> end points could use IPv4 fragm