HA configuration for Cisco CM TServer

[Seb Reeve]

Does anyone have any advice on HA configuration for a CCM 4.1.3 cluster?

Specifically I see from docs that JTAPI allows config of TServer to 2 CTIManager nodes in cluster - but how to configure backup TServer so failover works well?

Anyone really experimented with the options here. TServer will be 7.5.latest....

Thanks! Seb

[René]

Hi Seb,

It's more a year ago I've done it but I'll try to recall it... There were no issues related to TServer running in hot-standby. You can specify the same CTIManager address for both (primary/backup) TServers and it works. The backup TServer doesn't connect CTIManager until it becomes active = primary.

Stream Manager configuration was a bit tricky. SM does support only one client at a time so backup TServer is unable to connect SM. Our solution: we split SMs into two "farms" - one for primary TServer and the second one for backup.

Note about number of supported CTIManagers - JTAPI does support more that 2 CTIManagers but it's necessary use configuration file "jtapi.ini" instead of TServer's options. I don't know if it officially supported by Genesys but it works. The question is "does it make sense to have 4 CTIManagers?".

René

[Seb Reeve]

Thanks René - useful info on the SM connect limitations - the Genesys TOI docs clearly show SM connected to both TServers simultaneously so that's good to know.

In terms of using INI to reference 2 CTIManagers - i guess I was looking to remove a single CTIManager as a point of failure and would want TServer to connect to second CTIManager if the first one is no longer available.

Could we not just point Backup TServer to a different CTI Manager (so if anything fails the Backup TServer should take over)?

Seb

[René]

Hi Seb,

I found backup of Genesys configuration and I can confirm my previous post. It's possible (was in 7.2?) to specify just one connection to TServer in Stream Manager application (Connection tab).

I'm not sure that using different CTIManager for backup TServer is the right way. It will work but I would prefer using the same two CTIManagers for both TServers (cross-connection). Why? If the first CTIManager fails then primary TServer tries to connect 2nd CTIManager. If the 2nd fails it returns back to 1st one (round-robin principle). I'm not sure what happens in case of having connection just to one CTIManager that fails. I would say that TServer will try to connect and remains primary = no automatic switchover to backup TServer using different CTIManager. But I'm just guessing. Would be better to do some testing.

Last note - it's possible to download Cisco CCM 4.2 JTAPI Developers Guide from cisco website where you can find description of JTAPI and information about JTAPI in clustered environment.

René