Ah, I see. Yes, I embrace the pragmatism of such a design decision, though I do think that a little more emphasis could be put on the fact that rollover is not based on standard T1 values.
-- This message was painstakingly thumbed out on my mobile, so apologies for brevity and errors. Alex Balashov - Principal Evariste Systems LLC 235 E Ponce de Leon Ave Suite 106 Atlanta, GA 30030 Tel: +1-678-954-0670 Fax: +1-404-961-1892 Web: http://www.evaristesys.com/, http://www.alexbalashov.com On May 23, 2012, at 5:21 PM, "Kevin P. Fleming" <kpflem...@digium.com> wrote: > On 05/23/2012 07:09 AM, Alex Balashov wrote: >> You mean Asterisk uses a Timer T1 value of 250 by default? Or just for >> OPTIONS requests? > > Neither. If 'qualify' is enabled for a peer, the T1 timer for that peer is > reduced to the average of its response time to the OPTIONS pings that > 'qualify' generates (with a default minimum of 100ms). This behavior can be > overridden by changing the minimum T1 timer value as I posted previously. > > While this behavior is technically not RFC3261 compliant (and I've had > discussions about it with at least one of the RFC's authors), it's quite > useful in making decisions about whether a peer has become unavailable more > quickly than would normally be possible. For a local peer that responds to > OPTIONS requests in 100ms or less, if that peer stops responding, Asterisk > will be able to make that determination in approximately 6 seconds, instead > of the 32 seconds that would normally be required. > > -- > Kevin P. Fleming > Digium, Inc. | Director of Software Technologies > Jabber: kflem...@digium.com | SIP: kpflem...@digium.com | Skype: kpfleming > 445 Jan Davis Drive NW - Huntsville, AL 35806 - USA > Check us out at www.digium.com & www.asterisk.org > > -- > _____________________________________________________________________ > -- Bandwidth and Colocation Provided by http://www.api-digital.com -- > > asterisk-biz mailing list > To UNSUBSCRIBE or update options visit: > http://lists.digium.com/mailman/listinfo/asterisk-biz -- _____________________________________________________________________ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-biz mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-biz
