-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On Thu, Dec 31, 2009 at 12:08 AM, Fred Baker <fred@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.
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)
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 -----BEGIN PGP SIGNATURE----- Version: PGP Desktop 9.5.3 (Build 5003) wj8DBQFLPF2Yq1pz9mNUZTMRAhv/AKCNk2WiQt+zhO3o9EI/aOR2IMgvzwCgwSkQ ueQBckYm/1cTx5/atLaFd0A= =ooNM -----END PGP SIGNATURE----- -- "Fergie", a.k.a. Paul Ferguson Engineering Architecture for the Internet fergdawgster(at)gmail.com ferg's tech blog: http://fergdawg.blogspot.com/