[cisco-voip] Call Delays between subscribers in one cluster?

[Wes Sisk]

Lelio,

The "sync call forward database after LinkOOS" is just an attempted recovery
after the SDL link goes down.  You will very likely have endless odd
problems so long as your SDL Links continue to flap.  Resolve that, your
other problems will subside.  SDL communication is between CM servers on
TCP:8002.  A sniffer trace should show why the TCP session is terminated.

/Wes
  -----Original Message-----
  From: cisco-voip-bounces at puck.nether.net
[mailto:cisco-voip-bounces at puck.nether.net]On Behalf Of Lelio Fulgenzi
  Sent: Thursday, May 06, 2004 7:50 AM
  To: cisco-voip at puck.nether.net
  Subject: [cisco-voip] Call Delays between subscribers in one cluster?


  We've recently installed a number of new subscribers in our cluster for a
wide scale deployment coming up soon. We had some initial problems related
to SDL links going down, we've fixed that by setting the Sync Call Forward
Database After LinkOOS Advanced-CallManager-SystemParameter to true. We are
still experiencing a minor delay (~1sec) from end of dialing to ringback.
This delay is definately not there when dialing a phone on the same
subscriber. The delay seems to go away if the number has been called
recently, but it's not consistent, the delay will resurface quickly
sometimes and not others.

  Is anyone out there who is using multiple subscribers in a cluster seeing
a similar behaviour? We're using MCS7835s linked together with a gigabit
backbone and Cat6Ks in the background. The delay is happening even between
subscribers that are located on the same network as the publisher, so I
can't believe inter-networking delays are causing this.

  I've got a case open with the TAC, but wouldn't mind hearing back from
anyone who has either seen or not seen this delay with a multiple subscriber
deployment. For comparison, we've got the publisher, a seperate dedicated
DHCP/TFTP server, and five subscribers (one to be retired soon).

  Any comments would be appreciated.

  Lelio
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  Lelio Fulgenzi, B.A.
  Network Analyst (CCS) * University of Guelph * Guelph, Ontario N1G 2W1
  (519) 824-4120 x56354 (519) 767-1060 FAX (JNHN)

  "This signature may contain traces of nuts"
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