[cisco-voip] Connection Monitor Duration

[Lelio Fulgenzi]

Thanks again. 
--------------------------------------------------------------------------------
Lelio Fulgenzi, B.A.
Senior Analyst (CCS) * University of Guelph * Guelph, Ontario N1G 2W1
(519) 824-4120 x56354 (519) 767-1060 FAX (JNHN)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ 
"Buffalo buffalo Buffalo buffalo buffalo buffalo Buffalo buffalo."      WJR

  ----- Original Message ----- 
  From: Ryan Ratliff 
  To: Lelio Fulgenzi 
  Cc: cisco-voip at puck.nether.net 
  Sent: Thursday, June 28, 2007 11:04 AM
  Subject: Re: [cisco-voip] Connection Monitor Duration


  That varies based on the phone type.  I can't comment on what the  
  VG224 does but the newer phones will be a bit faster to failover than  
  older phones in certain situations. All of them will failover  
  immediately if the TCP session is reset.  Newer phones will take  
  about 4 seconds to failover after missing a TCP Ack.  Older phones  
  will be a bit more forgiving.  All of them will failover after  
  missing 2 or 3 (can never remember if server is 2 or phone is 2) SCCP  
  Keepalive Ack messages.

  -Ryan

  On Jun 28, 2007, at 10:47 AM, Lelio Fulgenzi wrote:

  Thanks for clearing that up Ryan. I read through it to quickly.

  I guess I'm seeing the result of the sccp keepalives? I'd like them  
  to register as quickly as possible. Both VG224 and phones.

  Any suggestions?

  ------------------------------------------------------------------------ 
  --------
  Lelio Fulgenzi, B.A.
  Senior Analyst (CCS) * University of Guelph * Guelph, Ontario N1G 2W1
  (519) 824-4120 x56354 (519) 767-1060 FAX (JNHN)
  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  "Buffalo buffalo Buffalo buffalo buffalo buffalo Buffalo  
  buffalo."      WJR
  ----- Original Message -----
  From: Ryan Ratliff
  To: Lelio Fulgenzi
  Cc: cisco-voip at puck.nether.net
  Sent: Thursday, June 28, 2007 10:44 AM
  Subject: Re: [cisco-voip] Connection Monitor Duration

  Connection Monitor Duration shouldn't control how fast a phone
  registers with the SRST router.  It controls how fast the phone fails
  back to CM FROM the SRST router.  The phone should still go into SRST
  as soon as it loses connection to all CMs.

  -Ryan

  On Jun 28, 2007, at 9:07 AM, Lelio Fulgenzi wrote:

  Something doesn't sit well with me with a Connection Monitor Duration
  of 120 seconds. Having to wait 2 minutes before a phone registers
  with SRST seems like a long time to wait, especially if you have
  someone stuck in an elevator during a power outage. :(

  Has anyone changed this to something lower, like 30 seconds and seen
  any adverse affects?


  ------------------------------------------------------------------------
  --------
  Lelio Fulgenzi, B.A.
  Senior Analyst (CCS) * University of Guelph * Guelph, Ontario N1G 2W1
  (519) 824-4120 x56354 (519) 767-1060 FAX (JNHN)
  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  "Buffalo buffalo Buffalo buffalo buffalo buffalo Buffalo
  buffalo."      WJR
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