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CUP SIP Trunk

Answered Question
Oct 31st, 2013
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Dears,


I have CUP publisher and subscriber.


I have created a sip trunk in our CUCM 8.6.2.  In the section SIP  Informaiton, there is a destination box.  1* is required ip address and  port.  To the right of this is a + button, that adds a new destination  address and port destination.  How is this second one used?  Is it a  round robin, or is it use 1* till 1* fails, then fail over to 2?


When we should use SRV records.I hope in a multinade but for my scenario how i can make a use of this feature.


In Jabber client login server address what ip address i shld put so that incase of failure of any server the jabber client should't  put the redundant server ip address again to login, the failover should occur transparently without any changes on the jabber client


Thanks

Correct Answer by Chris Deren about 3 years 9 months ago

Well, you did not create an SRV to point to SIP port 5060 of the CUPS servers. Build something like:


CUPS to CUCM


_sip._tcp.CUPS.abc.com       SRV service location:

           priority       = 10

           weight         = 0

           port           = 5060

           svr hostname   = vCUPSub1.abc.com




_sip._tcp.CUPS.abc.com       SRV service location:

           priority       = 10

           weight         = 0

           port           = 5060

           svr hostname   = vCUPSPub.abc.com


and then use CUPS.abc.com as the destination of the SIP trunk.


HTH,


Chris

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Chris Deren Thu, 10/31/2013 - 09:55
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It is top down, if you want load balancing for IMP use SRV.

Chris

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clark white Fri, 11/01/2013 - 06:30
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Hello


I am little bit confuse, I have created below configuaration in the DNS server, now i want to know what is should feed in the destination address of the sip trunk.


What will be my SRV destination address ???. according to the below configuartion.


_cuplogin._tcp.abc.com   SRV service location:

           priority       = 0

           weight         = 0

           port           = 8443

           svr hostname   = cups-sub.abc.com



_cuplogin._tcp.abc.com   SRV service location:

           priority       = 0

           weight         = 0

           port           = 8443

           svr hostname   = cups-pub. abc.com




CUPS to CUCM


_sip._tcp.CUCM.abc.com       SRV service location:

           priority       = 10

           weight         = 0

           port           = 5060

           svr hostname   = vCUCMPub1.abc.com




_sip._tcp.CUCM.abc.com       SRV service location:

           priority       = 10

           weight         = 0

           port           = 5060

           svr hostname   = vCUCMSub1.abc.com





Correct Answer
Chris Deren Fri, 11/01/2013 - 06:42
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Well, you did not create an SRV to point to SIP port 5060 of the CUPS servers. Build something like:


CUPS to CUCM


_sip._tcp.CUPS.abc.com       SRV service location:

           priority       = 10

           weight         = 0

           port           = 5060

           svr hostname   = vCUPSub1.abc.com




_sip._tcp.CUPS.abc.com       SRV service location:

           priority       = 10

           weight         = 0

           port           = 5060

           svr hostname   = vCUPSPub.abc.com


and then use CUPS.abc.com as the destination of the SIP trunk.


HTH,


Chris

clark white Fri, 11/01/2013 - 08:12
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Hello Chris,


Thank for the reply.


CUPS to CUCM


_sip._tcp.CUPS.abc.com       SRV service location:

           priority       = 10

           weight         = 0

           port           = 5060

       svr hostname   = vCUPSub1.abc.com -----> i think this should be replaced by svr hostname = cups-sub.abc.com



_sip._tcp.CUPS.abc.com       SRV service location:

           priority       = 10

           weight         = 0

           port           = 5060

       svr hostname   = vCUPSPub.abc.com----->i think hostname should be replaced by  svr hostname = cups-pub.abc.com


  • I hope below is a wrong service configured by me.???

CUPS to CUCM


_sip._tcp.CUCM.abc.com       SRV service location:

           priority       = 10

           weight         = 0

           port           = 5060

           svr hostname   = vCUCMPub1.abc.com




_sip._tcp.CUCM.abc.com       SRV service location:

           priority       = 10

           weight         = 0

           port           = 5060

           svr hostname   = vCUCMSub1.abc.com



  • Where  service_cuplogin._tcp.abc.com should be used. ?????
    Chris Deren Fri, 11/01/2013 - 08:21
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    I did not know you hostnames so I left it up to you.


    _cuplogin is used by Jabber clients as that is the default connection they will use.


    HTH,


    Chris

    clark white Fri, 11/01/2013 - 09:33
    User Badges:

    Dear Chris,


    Thanks for the reply,


    • CUPS.abc.com will be used SRV destiantion address and no more destination address are abe to add  when SRV is ticked, so the _cuplogin service should be configured where ???


    • when i change the setting on jabber client to default server and try to save, the server address automatically comes to https://loginp.webexconnect.com/cas/auth.do. I tried many times times but no sucess, i think there is a default link in some of the TAB of the presence server. can you route me where i can change this.


    • please answer my point 2 in previous reply, the service which you asked me to configure should be replaced by the below service whic i configure,




    Thanks

    Chris Deren Fri, 11/01/2013 - 09:35
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    You dont need to add _cuplogin anywhere, that is built into Jabber client and will be used natively unless you change the CUPS destiantion in jabber-config.xml.


    Chris

    clark white Fri, 11/01/2013 - 09:40
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    Hello chris,


    • when i change the setting on jabber client to default server and try to save, the server address is automatically changes to https://loginp.webexconnect.com/cas/auth.do.  I tried many times times to remove this address by pressing default and then save but no success,How we can remove this value.
    •    I hope the below service is not required as it is configured wrong by me, please confirm.


    CUPS to CUCM


    _sip._tcp.CUCM.abc.com       SRV service location:

               priority       = 10

               weight         = 0

               port           = 5060

               svr hostname   = vCUCMPub1.abc.com




    _sip._tcp.CUCM.abc.com       SRV service location:

               priority       = 10

               weight         = 0

               port           = 5060

               svr hostname   = vCUCMSub1.abc.com

    Chris Deren Fri, 11/01/2013 - 13:00
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    The config is stored in jabber-config.xml file which Jabber downloads from TFTP (CUCM server), if you have not modified the file then it should just point to your _cuplogin srv assuming you select on prem CUPS not webex Connect.

    Can you resolve the srv with nslookup?


    Chris

    clark white Fri, 11/01/2013 - 13:13
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    Hello chris,


    I was just checking jabber.config.xml file on TFTP of call manager, I did'nt found this file, I was surprise so i went to see in my previous client presence server installation i checked in CUCM i didnt find any jabber-config.xml file but the jabber is working fine for that client.


    I think the jabber-config.xml is uploaded in TFTP only when customized jabber is required please confirm ???


    Thanks

    Chris Deren Fri, 11/01/2013 - 13:22
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    If it is not there that means the default is used which means reliance on _cuplogin srv or statically entering server during loign.


    Chris

    clark white Fri, 11/01/2013 - 13:39
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    Hello,


    For previous client there was only one server so i was using the ip address but now in this case i have a redundant server so i am using SRV records and also I am selecting CUPS and not webex,still on pressing the default button  the value comming is  https://loginp.webexconnect.com/cas/auth.do  . It is irritating and i dont know from where to remove the link.


    Thanks



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