Re:[Tsvwg] Query???
Randall Stewart <randall@stewart.chicago.il.us> Thu, 02 August 2001 12:55 UTC
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Date: Thu, 02 Aug 2001 06:48:13 -0500
From: Randall Stewart <randall@stewart.chicago.il.us>
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To: Vijay Kumar Choudhary <vijay@mercurykr.com>
CC: TSV WG list <tsvwg@ietf.org>
Subject: Re:[Tsvwg] Query???
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Vijay: First a word of advice and then a response.. Please turn off HTML type mail encoding.. it is very very hard for many to read/reply to html encoded messages. Even netscape (which I use) core dumps when I do a reply-all... Something to do with the Font or other specification I guess. Your question, is how does one get a COMMUNICATION_UP notification in a SCTP association.. Bascially the detection of a restoral of a destination is performed by the HeartBeat mechanism. If you look at the section on HB you will see that no matter if the destination address is UP or DOWN you still send a HB to it. This makes the HB a "probe" for reachability. After a failure, when the HB receives a reply... then the COMM-UP notification is given.. I would invite you to download the SCTP reference implementation at: http://www.sctp.org and on two multi-homed machines, start the test process and setup an assocaition... then break one of the lan's interconnecting the two boxes.. in a bit (HB is setup to a bit of a delay :>) you should see a COMM-LOST notification... Then if you reconnect the lan... you should see (after a couple of minutes) a COMM-UP notification... Enjoy.. R -- Randall R. Stewart randall@stewart.chicago.il.us 815-342-5222 (cell phone) _______________________________________________ tsvwg mailing list tsvwg@ietf.org http://www1.ietf.org/mailman/listinfo/tsvwg
- Re:[Tsvwg] Query??? Randall Stewart
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