[120702] in North American Network Operators' Group
Re: ip-precedence for management traffic
daemon@ATHENA.MIT.EDU (Fred Baker)
Thu Dec 31 03:09:17 2009
From: Fred Baker <fred@cisco.com>
To: Luca Tosolini <bit.gossip@chello.nl>
In-Reply-To: <1262084530.4236.7.camel@localhost>
Date: Thu, 31 Dec 2009 00:08:18 -0800
Cc: nanog <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
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.
http://www.ietf.org/rfc/rfc4594.txt
4594 Configuration Guidelines for DiffServ Service Classes. J.
Babiarz, K. Chan, F. Baker. August 2006. (Format: TXT=144044
bytes)
(Status: INFORMATIONAL)
http://www.ietf.org/rfc/rfc2474.txt
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)
http://www.ietf.org/rfc/rfc2475.txt
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)
On Dec 29, 2009, at 3:02 AM, Luca Tosolini wrote:
> Experts,
> what is the general opinion of using ipp 7 'network control' for
> management traffic like: telnet ssh snmp .....
>
> The idea is that ipp 0 1 2 3 4 5 are used for user traffic
> ipp = 6 is used by default by routing protocols like BGP, OSPF,
> LDP ...
>
> this leaves out only ipp 7 for management traffic, on the premise that
> routing and management should not share the same queue and
> resources.....
>
> Thanks,
> Luca.
>
>
http://www.ipinc.net/IPv4.GIF
