Re: R: Kernel bug handling TCP_RTO_MAX?

From: Andrew McGregor (
Date: Fri Dec 13 2002 - 06:40:43 EST

Er, wasn't that SCTP? If so, that's RFC 3309 and many, many drafts. You
might also want to look at DCCP (draft-ietf-dccp-*) and the various
documents from the IETF's PILC group. There is also a proposal for a new
TCP-style protocol with a real differential controller, the name of which I
can't recall right now.

See also draft-allman-tcp-sack for another proposal for a fix that won't
break old stacks. Also draft-ietf-tsvwg-tcp-eifel-alg,
draft-ietf-tsvwg-tcp-eifel-response and many more.

I can't claim to be a TCP expert, but TCP_RTO_MIN can certainly have a
different value for IPv6, where I believe millisecond reolution timers are
required, so 2ms would be correct.

Unfortuntately, TCP is incredibly subtle. So, the IETF are really
conservative about even suggesting modifications to it, because a common
and badly behaved stack can cause major disasters in the 'net.


--On Thursday, December 12, 2002 20:45:24 -0800 Nivedita Singhvi
<> wrote:

>> You are looking for "STP" perhaps ?
>> It has a feature of waking all streams retransmits, in between
>> particular machines, when at least one STP frame travels in between
>> the hosts.
>> I can't find it now from my RFC collection. Odd at that..
>> Neither as a draft. has it been abandoned ?
> Learn something new every day :). Thanks for the ptr. I'll
> look it up..
>> > It would be wonderful if we could tune TCP on a per-interface or a
>> > per-route basis (everything public, for a start, considered the
>> > internet, and non-routable networks (10, etc), could be configured
>> > suitably for its environment. (TCP over private LAN - rfc?). Trusting
>> > users would be a big issue..
>> >
>> > Any thoughts? How stupid is this? Old hat??
>> More and more of STP ..
> thanks,
> Nivedita

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