Dec 16

CUCM and IM&P Integration with SRV Records

For us Cisco techs, one of the more often than not nowadays is that have to deal with the MS world of DNS (AND Certifciate Architecture… I’ll talk about this in later articles). I’ve had a fair bit of experience with DNS in the past, so I thought I would just share a little about integrating CUCM with IM & Presence using SRV records both ways to support CUCM Clusters and IM & Presence Clusters for high availability.

DNS Configuration

Create A (Host) Records

CUCM DNS A Records

Type Hostname IP Address

IM&P DNS A Records

Type Hostname IP Address

Create SRV Records

IM&P Cluster Name:

Type Identifer Protocol Weight Priority Host
SRV _sip _tcp 10 10
SRV _sip _tcp 10 10

CUCM Cluster Name:

Type Identifer Protocol Weight Priority Host
SRV _sip _udp 10 10
SRV _sip _udp 10 10

Verify Records via NSLOOKUP

>  set q-all

The above should output the following results.

-        The SRV Records and their target hosts
-        An A record for every target host identified in the SRV record.

CUCM Configuration

SIP Trunk

  1. Navigate to Device, then select Trunks
  2. Select Add New
  3. Select SIP Trunk for Trunk Type
  4. Select Next
  5. Complete the details of the SIP Trunk as per normal.
  6. Under SIP Information, check the box  Destination Address is SRV

Note: When the checkbox is ticked, CUCM changes the outbound SIP protocol from udp to tcp.

  1. Type the IM&Presence Cluster Name. (
  2. Select Save and then reset the Trunk.

Configure SIP Publish Trunk

  1. Navigate to the Service Parameters, then Cisco CallManager.
  2. Find “IM & Presence Publish Trunk”
  3. Drop the arrow down and select the above SIP Trunk.

 IM & Presence Configuration

SRV Cluster Name

  1. Navigate to Service Parameters, then Cisco SIP Proxy.
  2. Find “SRV Cluster Name”
  3. Type the IM&Presence cluster name (
  4. Select Save

Presence Gateway

  1. Navigate to Presence, then Gateways.
  2. Select Add New
  3. Select CUCM for Presence Gateway Type.
  4. Type a Descriptive note.
  5. Type the SRV Record for the CUCM Cluster Name.

Note: Do not strip the SRV Identifier or Protocol. Example input would be

Feb 05

IMP Users are showing Status as Offline, when Logged into Jabber

This is widely discussed issue in the Jabber community, so I thought I would write a quick ‘how-to’ on the subject.

Ok, so I’ve logged into Jabber (I’m using v9.6 and IM&P 9.1.2 Build), however this issue is not constrained to one particular version of IM&P and/or CUP Server. So when logged into Jabber and online, I should be able to view the presence status of colleagues that are also logged into jabber and vice-versa. However all I see is an ‘offline’ status for each and every colleague.

To view the presence status of a user, that user must have an IM Address. Either you populate this manually by editing the contact or in most case the IM Address is pulled across using the user’s email address. So if you don’t see an IM Address for the user, populate it.

Now if the user does have an IM Address, make sure the IM&P Domain Name is either the same name, or a parent of the IM Address suffix. What I mean is if a user has an IM Address of make sure the IM&P Domain name is either or just This is a common misconfiguration in the workplace, implementation engineers often don’t think to enter the parent domain name, and the sub-domain is entered. The problem is yes the user is logging onto the sub-domain, however the company email address is and not As I said before the IM Address is more than likely pulled across from the ‘mail’ field (Email), hence creating a variance in domain names.

To change the IM & Presence Domain, the Proxy, Presence Engine and the XCP Router Service needs to be stopped on all Publishers and Subscribers

The SIP Proxy and Presence Engine services are located on the Feature Services page in the IM&P Serviceability Admin page.

The XCP Router service is located on the Network Services page in the IM&P Serviceability Admin page.

After the IM & Presence Domain has been updated, start all three services on all servers and log back in. Now you should be viewing the correct presence status of colleague’s.

Below is a quick blurb from the Help Page on the Cisco CUCM Server.

IM and Presence Domain

Provide a valid domain that specifies the IM and Presence domain name of the IM and Presence server. Typically this parameter should be an enterprise top-level domain name (for example, The parameter that you enter allows the IM and Presence server to identify which URIs are to be treated as local and managed by this installation. Instant Messaging (IM) or availability status requests addressed to other domains must be forwarded via federation. Other SIP requests may be proxied.