nanog mailing list archives
Re: BCP regarding TOS transparancy for internet traffic
From: Alan Hannan <alan () routingloop com>
Date: Wed, 25 May 2005 22:54:57 -0700
Back in 1999 or early 2000, at GBLX we decided to implement DSCP settings on transit network traffic. We found that a remotely small % of TCP traffic abended when the DSCP were changed within the stream. Understandably, we were concerned. Given the incompatibility with intended TOS/DSCPs behavior, and the TCP spec, we 'fixed' TCP in RFC 2873, June, 2000. Another 'fix' to interpretations of the TCP spec was authored by S. Floyd, RFC 3360, August, 2002. -alan Thus spake Fred Baker (fred () cisco com) on or about Wed, May 25, 2005 at 11:18:42AM -0700:
On May 25, 2005, at 10:39 AM, Sam Stickland wrote:While it's true that IP is end-to-end, are fields such as TOS and DSCP meant to be end to end? A case could be argued that they are used by the actual forwarding devices on route in order to make QoS or even routing decisions, and that the end devices shouldn't actually rely on the values of these fields?It used to be that TCP would reset a session if the TOS byte changed in mid-session. That certainly sounds like an end-to-end expectation.
Current thread:
- BCP regarding TOS transparancy for internet traffic Mikael Abrahamsson (May 25)
- Re: BCP regarding TOS transparancy for internet traffic Valdis . Kletnieks (May 25)
- Re: BCP regarding TOS transparancy for internet traffic Saku Ytti (May 25)
- Re: BCP regarding TOS transparancy for internet traffic Valdis . Kletnieks (May 25)
- Re: BCP regarding TOS transparancy for internet traffic Saku Ytti (May 25)
- Re: BCP regarding TOS transparancy for internet traffic Saku Ytti (May 25)
- Re: BCP regarding TOS transparancy for internet traffic Valdis . Kletnieks (May 25)
- Re: BCP regarding TOS transparancy for internet traffic Eric A. Hall (May 25)
- Re: BCP regarding TOS transparancy for internet traffic Sam Stickland (May 25)
- Re: BCP regarding TOS transparancy for internet traffic Fred Baker (May 25)
- Re: BCP regarding TOS transparancy for internet traffic Alan Hannan (May 25)
- Re: BCP regarding TOS transparancy for internet traffic Eric A. Hall (May 25)
- Re: BCP regarding TOS transparancy for internet traffic Sam Stickland (May 25)
- Re: BCP regarding TOS transparancy for internet traffic Kevin Oberman (May 25)
- Re: BCP regarding TOS transparancy for internet traffic Eric A. Hall (May 25)
- Re: BCP regarding TOS transparancy for internet traffic Saku Ytti (May 25)
- Re: BCP regarding TOS transparancy for internet traffic Eric A. Hall (May 25)
- Re: BCP regarding TOS transparancy for internet traffic sthaug (May 25)
- Re: BCP regarding TOS transparancy for internet traffic Eric A. Hall (May 25)
- Re: BCP regarding TOS transparancy for internet traffic Saku Ytti (May 25)
- Re: BCP regarding TOS transparancy for internet traffic Lars Erik Gullerud (May 25)
- Re: BCP regarding TOS transparancy for internet traffic Eric A. Hall (May 25)