[cisco-voip] CCM Services Redundancy

[Lelio Fulgenzi]

Re: [cisco-voip] CRS and IPCC express licensing rejectedThat is my understanding, yes.
  ----- Original Message ----- 
  From: Ruben Montes 
  To: Lelio Fulgenzi 
  Cc: cisco-voip at puck-nether.net 
  Sent: Monday, November 21, 2005 12:01 PM
  Subject: RE: [cisco-voip] CCM Services Redundancy


  So, if you're pointing to the IP addresses of the subscriber for example, you lose all this URL if it goes down, is that correct?
  Has anybody tried to do some sort of load-balancing? SLB (server load balancing) for example with the http service in a CCM cluster?
    -----Mensaje original----- 
    De: Lelio Fulgenzi [mailto:lelio at uoguelph.ca] 
    Enviado el: lun 21/11/2005 17:52 
    Para: Ruben Montes 
    CC: cisco-voip at puck-nether.net 
    Asunto: Re: [cisco-voip] CCM Services Redundancy


    Ah - I see. There are several schools of thought there. By using IP address you eliminate the need and dependancy for DNS, however, if that server that you are pointing to goes down, then so does your service. By using DNS, you should be able to keep all those services up and running. I'm not sure about the DNS caching on a phone, so if a phone has already used a service and it goes to use the service again, will it re-request the DNS entry again or use what it has in cache? If so, does it time out? And if you figure this all out can you rely on it being the same in the next release of software?

    I think the general concensus has been to go with IP addresses from what I've seen on the list.

      ----- Original Message ----- 
      From: Ruben Montes 
      To: Lelio Fulgenzi 
      Cc: cisco-voip at puck-nether.net 
      Sent: Monday, November 21, 2005 11:41 AM
      Subject: RE: [cisco-voip] CCM Services Redundancy


      Hello,

      I'm refering to the services that can be accessed through the IP phone (directory, help, etc); all the URLs that are configured in the enterprise parameters option...

      Regards,

      Ruben

        -----Mensaje original----- 
        De: Lelio Fulgenzi [mailto:lelio at uoguelph.ca] 
        Enviado el: lun 21/11/2005 17:13 
        Para: Ruben Montes 
        CC: cisco-voip at puck-nether.net 
        Asunto: Re: [cisco-voip] CCM Services Redundancy


        Many of the services can be run on multiple subscribers to provide redundancy, however, there are some services that require access to the publisher. If the publisher goes down or the synchronization between the cluster is lost you will lose some services/features. I don't know if there is a full list, but it does include the forwarding of phones and extension mobility. Basically, any service that writes(?) to the database.
          ----- Original Message ----- 
          From: Ruben Montes 
          Cc: cisco-voip at puck-nether.net 
          Sent: Monday, November 21, 2005 5:19 AM
          Subject: [cisco-voip] CCM Services Redundancy


          Hello,

          is it possible to make some kind of redundancy with the services activated in the CallManager?

          We don't want to lose all this services when the server associated fail...

          Thanks,



          Ruben



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