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Can someone show me how to configure 2 h.323 gateways to failover to one another w/call manager

gil.guevara
Level 1
Level 1

Hello - I'm not sure on how to make this work.  I need my primary h.323 gateway, Cisco 1900 router, to failover to the seconday h.323 gateway, cisco 1900 router, when the primary fails.  We are pushing t1s/PRIs.  Cisco Call Manager is routing the calls to the gatways.  Thanks

17 Replies 17

Felipe Garrido
Cisco Employee
Cisco Employee

You'll need to add both H.323 gateways to callmanager and use the Route Group configuration to setup the order in which you want them to be used.

http://www.cisco.com/en/US/docs/voice_ip_comm/cucm/admin/6_1_1/ccmcfg/b03rtgrp.html

You'll then need to add the Route Groups into a Routelist and apply it under the Route pattern

http://www.cisco.com/en/US/docs/voice_ip_comm/cucm/admin/6_1_1/ccmcfg/b03rtlst.html


-Felipe

We did - see attached.  We can hit router when we make it the primary, but whe when try to make it failover it won't take the second.

Try Changing the Service Parameter  "Stop Routing on User Busy Flag" on Call Manager to false.

What will that do?

There are two options for the failover, in CUCM change this 2 service parameters:

Stop Routing on Unallocated Number Flag = False
Stop Routing on User Busy Flag = False

Otherwise CUCM won't hunt to the next GW.

Or add this command to the GW

no dial-peer outbound status-check pots

This has been asked a lot of times before, please try searching for answers before posting.

HTH

java

If this helps, please rate

www.cisco.com/go/pdihelpdesk

HTH

java

if this helps, please rate

I tried ithe Services Parameters and it didn't work.  A TAC engineer told me it couldn't be done with H.323 and that MGCP can.  Is he right?

I am sure this can be done with H323. I have a question for the support community on this though, cant he just add a voip dial peer with a lower preference and point that to his second H323 gateway and all is good? You wouldnt even need to add the second gateway to a route group either correct? Although that would be the obvious way of handling it.

Thanks

I think you are refering to "overflow" and not "failover".  I need to be able to failover automatically to the second gateway should the PRIs or the server on the primary fail.  The second gateway will take over and feed the traffic into its secodary server.

however - I will need to incorpate overflow too, but after I can get the failover to work.  Thanks

Tracy - can you give me an example fo this solution please?  Thanks

For overflow I believe you would just create a voip dial-peer with a lower preference with the session target pointing to the ip address of the gateway you want to overflow to.

example:

if your pots dial peer for normal operation on the gateway looked like this

dial-peer voice 1 pots
translation-profile outgoing fallback
preference 1
destination-pattern 8[2-9]......
direct-inward-dial
port 0/1/0:23
forward-digits 7

Then the voip dial peer for overflow might look like this when that is unavailable.

dial-peer voice 2 voip
preference 4

destination-pattern 8[2-9]......
modem passthrough nse codec g711ulaw
voice-class codec 1
voice-class h323 1
session target ipv4:Overflow Gateway IP address

incoming called-number .
dtmf-relay h245-alphanumeric
fax rate disable
no vad

Java or Bill will be able to say if this would work correctly or not.

Yes, it's possible.

https://supportforums.cisco.com/message/1157495#1157495

https://supportforums.cisco.com/message/1131386#1131386

https://supportforums.cisco.com/message/1329453#1329453

https://supportforums.cisco.com/message/1236504#1236504

I'd look at your config because as you can see, it works.

HTH

java

If this helps, please rate

www.cisco.com/go/pdihelpdesk

HTH

java

if this helps, please rate

I tried this and it didn't work.  TAC checked my configuration and said it was OK, but he also said the failover won't work because it's h.323.  I'm not sure what to do...other than go with MGCP.  Thanks

In H.323 the failover works only when the primary gateway itself goes off-line, and not when the

server it's feeding or it's PRIs go down.  Just tested this.  Thanks

Can someone give me an example on how to make one gw overflow to a second gateway?  I might be able to use this as an alternate solution.

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