Not able to login in RTMT version 12.0 cucm

[monasir]

Hi i'm not able to login in rtmt.

I'm receiving this message:

RTMT application cannot communicate with specified node/cluster.
Please verify the host IP address is correct and the network connection is up, and try again.

We have just deployed CUCM version 12 successfully without any problems.

But still not able to login in RTMT.

I have tried :

- installed RTMT again ( uninstall - install)

- used hostnames instead of IP addresses.

 We haven't installed certificates on the cucm yet, would this be a reason which gives problems.

[George Sotiropoulos]

Hello,

Please install the certificates first, then restart the Tomcat service and try again.

Additionally, you may check the reachability between your PC installed and the CUCM you are trying to login as well as try to logging from another  PC to RTMT,

George

[monasir]

Hi George.

Thanks for your fast reply, ok i knew there could be something related with certificates.

At the moment we are not able to install the certificates.

So that means during that time i'm not able to login at rtmt , correct?

[Ratheesh Kumar]

If you have expired certificates you have to fix it and restart Tomcat service.

Also there was an old bug on RTMT, which triggers after the upgrade. Please try the below workaround and see that helps

(C:\Program Files (x86)\Java) -> copy "jre7" file
*from (C:\Program Files (x86)\Cisco\Unified Rtmt\JRtmt) delete existing "jre" file
*paste "jre7" file in (C:\Program Files (x86)\Cisco\Unified Rtmt\JRtmt)
*rename it as "jre".


Hope this Helps
Cheers
Rath!

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[monasir]

Hi everyone,

Thanks all... if we have the possibility to install the certificates i will fix it and try all the workarounds.
Thanks for the assistance.

[Shalid Kurunnan Chalil]

Hello there, 

• Check the network connectivity with the Cisco call manager from your windows machine as mentioned by George. 
• Ensure that you have installed the RTMT with administrator privilege. 
• Ensure that you are launching RTMT in Run as Administrator mode. 
• open the port if you have any firewall between your PC and the server. 

Please see the note from Cisco about the certificate;

If your Root or Intermediate CA Certificate uses the RSASSA-PSSsignature algorithm, do not sign the Tomcat certificate with this CA; otherwise, RTMT will not launch. This is because the TLS versions through 1.2 do not support the RSASSA-PSS Signature Algorithm and a bug is opened against Java to add this support in a future TLS version. Related to certificate 

Regards,

Shalid 

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