Hello Folks,

RE: SR 8606286850 -
    Enhancement: Implement RFC 2873 to prevent IP precedence change causing RESET

The HP-e3k TCP/IP transport has been enhanced to support the
work-in-progress "proposed" RFC 2873 which recommends ignoring IP
precedence changes in the TCP/IP of the end host systems.

This change supports the CISCO routers modification of the IP
precedence fields once a connection is established for what is known
by CISCO as a "QoS environment".


The hp-e3K as per "standard" RFC 793 completes the SYN/SYN-ACK/ACK
three-way handshake following the "standard" RFC 793 rules for
accepting a IP precedence change and replying with a modified IP
precedence in a SYN-ACK or ACK packet.  Once the three-way TCP/IP
handshake is complete, the hp-e3k follows the "proposed" RFC 2873
rules and ignores any further IP precedence change on the TCP/IP
connection.

This enhancement to TCP/IP on the HP-e3k is currently only available
as a "Site Specific" patch for 7.0 as this is the only O.S. we have
customers committed to testing.  We will build a 7.5 patch with this
enhancement after successful testing on 7.0 or possibly earlier if we
have other customers request to test this enhancement.

If you are interested in testing this enhancement, please contact the
HP-RC and request enhancement SR 8606286850 for "RFC 2873".

Regards,

James Hofmeister
Hewlett Packard - Global Solutions Engineering (WTEC)
P.S. My Ideals are my own, not necessarily my employers.




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