ip-precedence for management traffic
fergdawgster at gmail.com
Thu Dec 31 02:15:25 CST 2009
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On Thu, Dec 31, 2009 at 12:08 AM, Fred Baker <fred at cisco.com> wrote:
> RFC 4594 would suggest using DSCP CS2 (010000xx in the TOS byte; xx is
> the ECN flags). Section 3.1 discusses the issues with CS7, which is the
> DSCP counterpart to the deprecated IP Precedence 7. RFCs 2474/2475
> discuss the Differentiated Services Architecture and its implementation.
> 4594 Configuration Guidelines for DiffServ Service Classes. J.
> Babiarz, K. Chan, F. Baker. August 2006. (Format: TXT=144044 bytes)
> (Status: INFORMATIONAL)
> 2474 Definition of the Differentiated Services Field (DS Field) in the
> IPv4 and IPv6 Headers. K. Nichols, S. Blake, F. Baker, D. Black.
> December 1998. (Format: TXT=50576 bytes) (Obsoletes RFC1455, RFC1349)
> (Updated by RFC3168, RFC3260) (Status: PROPOSED STANDARD)
> 2475 An Architecture for Differentiated Service. S. Blake, D. Black,
> M. Carlson, E. Davies, Z. Wang, W. Weiss. December 1998. (Format:
> TXT=94786 bytes) (Updated by RFC3260) (Status: INFORMATIONAL)
I feel compelled to say that once a packet leaves you administrative
control, all bets are off, of course.
IP Precedence flagging is not an honored "bit" in The Internet.
Of course, if you own the end-to-end path, anything is possible.
- - ferg
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"Fergie", a.k.a. Paul Ferguson
Engineering Architecture for the Internet
ferg's tech blog: http://fergdawg.blogspot.com/
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