Re: ip-precedence for management traffic

[Fred Baker <fred () cisco com>]

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