[openib-general] CM timewait issue

Sean Hefty mshefty at ichips.intel.com
Wed Feb 2 16:42:14 PST 2005


I'm trying to determine the timeout value to use for CM timewait 
states.  Here's what I think so far:

It should be the maximum timewait value for any path ever loaded by the 
client.

For the sender of a REQ: use the path record: packet life time * 2 + 
the target ACK delay returned in the REP.

For the receiver of the REQ, use the local ACK delay.

For the receiver of a LAP: use the local ACK delay.

What should the sender of the LAP use?  The sender will have the path 
record: packet life time, but may not know the remote CA ACK delay.

Should the CM just use the local ACK delay sent or received in the 
REQ/LAP in all cases for simplicity?

- Sean



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