RFC 2598 specifies: The default DSCP for Delay Bound (for voice) is the codepoint 101110, as specified in the I-D as well.
Section 2.4 specifies "By default we suggest an 'experimental' DSCP of 101111 be used to indicate that DB PHB is required." Actually, the capability to set DSCP's is the really important item, even if someone uses a different default in their implementation IMHO - it can be changed by the ISP according to other design considerations as required. Border routers to the IP backbone may remark the DSCP's anyway to prevent abuse by endpoints. Thanks, Henry Henry Sinnreich MCI 400 International Parkway Richardson, Texas 75082 USA -----Original Message----- From: Eagan, Christopher [mailto:[EMAIL PROTECTED] Sent: Tuesday, February 10, 2004 8:45 AM To: [EMAIL PROTECTED]; [EMAIL PROTECTED]; [EMAIL PROTECTED]; [EMAIL PROTECTED]; [EMAIL PROTECTED] Cc: [EMAIL PROTECTED] Subject: [Sip-implementors] Question on draft-sinnreich-sipdev-req-03.txt In regards to requirement IP-3, you state "The Assured Forwarding DSCP value Low Drop Precedence for RTP voice packets MUST be 100010". I am assuming you are suggesting using this DSCP but it isn't said explicitly. Why is this specified versus the EF marking 101110? I agree low dropping is important for calls but if a packet is delayed and not dropped, it cannot be used and therefore might as well have been dropped. I realize these requirements come from "deployment experience" so is there an operational reason for this or am I reading it wrong? Sincerely, Christopher Eagan Software Engineer Lockheed Martin (301) 240 - 6328 [EMAIL PROTECTED] _______________________________________________ Sip-implementors mailing list [EMAIL PROTECTED] http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
