12-14-2020 08:36 AM
I have two CUCM clusters. Each running 12.5 Code.
I wish to build a NON-Gateway Controlled Inter Cluster Trunk between them. I am trying to find what Ports need to be allowed through Firewalls.
I found multiple documents show Intra-Cluster Trunk ports, non that really call out Inter-Cluster potrs.
The ICT will be used for Sip Calls between the two sites. I have found information show ICT but this is in regard to Gateway controlled.
I guess the confusing thing to me is, are Intra-cluster and Inter-cluster trunks the same in Cisco Documents?
12-14-2020 09:45 AM
The trunk types you reference is H323 and then you wrote that the calls will be SIP.
You’re better off if you create a SIP trunk between your systems. In that case it would use the normal ports used for SIP, those are well defined and documented.
12-14-2020 11:51 AM
Thank you Roger for you fast response.
Still a bit confused. When I Try to build a Trunk between the two CUCMs (12.5). I have Three choices.
H225 Trunk Gate Keeper controlled
Inter-Cluster with Gateway
Inter-Cluster NON-Gateway
SIP
The two Trunk types:
Inter-Cluster with Gateway
Inter-Cluster NON-Gateway
They are for H323 Traffic?
Trying to understand the differences between the Inter-Cluster Trunk(s) and a SIP trunk.
Thank you
12-14-2020 12:53 PM - edited 12-15-2020 07:11 AM
Yes they are for H323. A SIP trunk can be used for a inter cluster trunk (ICT), you don’t need to select any of the once named inter-cluster trunks for a ICT. Picture below is from the help page in CM for trunks setup.
All the once highlighted are for H323, the giveaway is the word "gatekeeper" as that's a H323 thing.
There is no such thing as an intra cluster trunk. You have probably seen the word intra used for communication that happens between nodes within a cluster. That would be intra cluster communication and has nothing to do with trunks, no matter what type of trunk you'd use.
12-14-2020 12:57 PM
See this document for details on how to configure a SIP trunk. https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/admin/11_5_1/sysConfig/CUCM_BK_SE5DAF88_00_cucm-system-configuration-guide-1151/CUCM_BK_SE5DAF88_00_cucm-system-configuration-guide-1151_chapter_01110.html
12-14-2020 01:08 PM
Also have a look at this excellent presentation from Cisco Live. https://www.ciscolive.com/c/dam/r/ciscolive/emea/docs/2013/pdf/BRKUCC-2006.pdf
12-15-2020 05:02 AM
Thanks again for the fast response. I will review the docs. I will try the SIP configuration first.
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