[cisco-voip] Failover testing

Sat Apr 29 11:42:36 EDT 2006

Hi Wes

I have applied the voice class and set the timmer to 3 seconds but I
still get the same issue, I am unable to find the Run H.225D on Every
Node flag in the gateway configuration does this option still apply on
4.1(3)

________________________________

From: Wes Sisk [mailto:wsisk at cisco.com] 
Sent: Saturday, April 29, 2006 4:19 PM
To: Nick Kassel
Cc: cisco-voip at puck.nether.net
Subject: Re: [cisco-voip] Failover testing

the CM stopped/started test is a big hint.  Sounds like your incoming
circuit is timing out the call before the h323 gateway hunts to an
available CM.  

when the server is shut down you must wait for TCP session establish
timeout

when server is up but CM is shut down you get immediate ICMP port
unreachable from CM back to the GW so the GW knows to try the next
available member (usually specified with 'preference' on the voip
dial-peer)

You probably need to decrease the h225 session setup timers in your
gateway confiug:

http://www.cisco.com/en/US/customer/products/sw/voicesw/ps556/products_c
onfiguration_example09186a0080094852.shtml

You could even turn it down to 1:

h225 timeout tcp establish 1

if CM does not respond in 1 second (depending on your network round trip
time) most likely it is not going to respond at all.

/Wes

On Apr 29, 2006, at 11:09 AM, Nick Kassel wrote:

We have been doing some failover testing between call managers today and
I have come across an issue with one of out remote sites. We have a 3
call manager cluster and the if I shut down the subscriber that this
site is registered to then all the phones will register to the other
subscriber but when I place a call to the phones I get destination out
of order on the debug, I have dial peers for all three call managers in
the config, however if I were to just stop the call manager service on
the subscriber and not shut the server down then I can place calls to
the phones fine, it would appear that when the subscriber is not on the
network then the calls don't go through. Has anyone seen any issues like
this before.

The config is as follows.

!

!

!

dial-peer cor custom

!

!

!

dial-peer voice 100 voip

 destination-pattern .

 codec g711ulaw

 fax rate disable

 no vad

!

dial-peer voice 9 pots

 call-block translation-profile incoming call_block_profile

 call-block disconnect-cause incoming invalid-number

 destination-pattern 9T

 progress_ind alert enable 8

 fax rate disable

 direct-inward-dial

 port 0/0:15

!

dial-peer voice 8201 voip

 description Fax Dial-Peer

 destination-pattern 8020[1-3]

 progress_ind setup enable 3

 session target ipv4:172.21.18.3

 dtmf-relay h245-alphanumeric

 codec g711ulaw

 fax rate disable

 ip qos dscp cs5 media

 no vad

!

dial-peer voice 82 voip

 destination-pattern 802..

 progress_ind setup enable 3

 translate-outgoing calling 1

 session target ipv4:172.30.0.2

 dtmf-relay h245-alphanumeric

 codec g711ulaw

 ip qos dscp cs5 media

 no vad

!

dial-peer voice 83 voip

 destination-pattern 802..

 progress_ind setup enable 3

 translate-outgoing calling 1

 session target ipv4:172.30.0.3

 dtmf-relay h245-alphanumeric

 codec g711ulaw

 ip qos dscp cs5 media

 no vad

!

dial-peer voice 84 voip

 destination-pattern 802..

 progress_ind setup enable 3

 translate-outgoing calling 1

 session target ipv4:172.20.100.2

 dtmf-relay h245-alphanumeric

 codec g711ulaw

 ip qos dscp cs5 media

 no vad

!

num-exp 02.. 802..

gateway

 timer receive-rtp 1200

!

!

call-manager-fallback

 secondary-dialtone 9

 max-conferences 4

 ip source-address 172.21.18.2 port 2000

 max-ephones 48

 max-dn 60

 time-format 24

 date-format dd-mm-yy

!

!

line con 0

line aux 0

line vty 0 4

 exec-timeout 60 0

 password telnet

 login

!

!

end

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Registered in England No. 1903304

Charles Stanley Sutherlands and Tozer Wingate are divisions of Charles Stanley & Co. Ltd

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