CVP Failover Not working

Hi,
I have UCCE with CVP in my environment and also we are having 2 Call/VXML server for redundancy purpose. I have configured below command on VXML GW also created dialpeer towards my second call/vxml server to achieve redundancy but somehow my fail over is not working.
My UCCE with primary CVP is working fine without having any issue.
ip host mediaserver x.x.x.x
ip host mediaserver-backup x.x.x.x
Also I have used media_server ECC variable as 'mediaserver' to achieve redundancy.
I'm not sure weather i am missing any other configuration to achieve the fail over.
Please suggest.

Thanks Chaitan for your reply.
Yes, I am looking for redundancy as if CVP1 goes down, then calls should go to CVP2.
We are not using SIP proxy in our environment. Please find dial-peer configuration which are targeting to CVP1 & CVP2
dial-peer voice 7701 voip
 destination-pattern 77..
 translate-outgoing called 1
 session protocol sipv2
 session target ipv4:168.167.0.162 (CVP1)
 session transport tcp
 voice-class codec 1  
 voice-class h323 1
 dtmf-relay rtp-nte h245-signal h245-alphanumeric
 no vad
dial-peer voice 7702 voip
 destination-pattern 77..
 translate-outgoing called 1
 session protocol sipv2
 session target ipv4:168.167.0.163 (CVP2)
 session transport tcp
 voice-class codec 1  
 voice-class h323 1
 dtmf-relay rtp-nte h245-signal h245-alphanumeric
 no vad
Thanks

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              >> weblogic.security.service.SecurityServiceManager.runAs(SecurityServiceManager.java:785)
              >>
              >> at
              >> weblogic.rmi.internal.BasicServerRef.handleRequest(BasicServerRef.java:308)
              >>
              >> at
              >> weblogic.rmi.internal.BasicExecuteRequest.execute(BasicExecuteRequest.java:30)
              >>
              >> at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:153)
              >> at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:134)
              >> End server side stack trace
              >>
              >> In this (rare) case, my system recovered beautifully!
              >>
              >> Bob.
              >>
              >> Tom Barnes <[email protected]> wrote:
              >>
              >>> Hi Bob,
              >>>
              >>> The particular exception you are seeing seems like it could use
              >>> some enhancement - it should be wrapped in a "friendlier" exception
              >>> such as "remote server XXX unavailable". I
              >>> recommend filing a case with customer support.
              >>>
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              >>> to be able to handle send failures. WebLogic
              >>> will automatically retry sends in cases where there is no ambiguity,
              >>> but
              >>> when it can't determine the nature of the failure (eg it can't
              >>> determine whether or not the message made it to a JMS server) it
              >>> throws the exception back to the client to let the client
              >>> decide what it wants to do - eg commit/don't commit, reconnect
              >>> and resend, reconnect and don't resend.
              >>>
              >>> Tom
              >>> Bob S wrote:
              >>>
              >>>> I'm using WebLogic 7 SP1 on Windows 2000. I've configured a
              >>>> distributed queue that has two member. The two members are
              >>>> running in two WebLogic instances in a Cluster configuration
              >>>> (call them Server1 and Server2). My client posts messages to the
              >>>> distributed queue and it seems the messages seem to be
              >>>> distributed between Server1 and Server2 (as expected). Although,
              >>>> when I kill Server1, the client complains that it can't connect
              >>>> to the queue on Server1 and never recovers. I would have
              >>>> expected to see (at most) one exception and then the next
              >>>> request to use Server2's queue. The client gets the following
              >>>> exception:
              >>>>
              >>>> weblogic.jms.dispatcher.DispatcherException: Dispatcher not found in
              >>>
              >>>
              >>> jndi: Server1,
              >>>
              >>>> javax.naming.NameNotFoundException: Unable to resolve
              >>>> 'weblogic.jms.S:Server1'
              >>>> Resolved: 'weblogic.jms' Unresolved:'S:Server1' ; remaining name
              >>>> 'S:Server1'
              >>>> at
              >>>> weblogic.jms.dispatcher.DispatcherManager.dispatcherCreate(DispatcherManager.java:323)
              >>>>
              >>>> at
              >>>> weblogic.jms.dispatcher.DispatcherManager.findOrCreate(DispatcherManager.java:413)
              >>>>
              >>>> at weblogic.jms.frontend.FEProducer.<init>(FEProducer.java:87)
              >>>> at weblogic.jms.frontend.FESession$2.run(FESession.java:607)
              >>>> at
              >>>> weblogic.security.service.SecurityServiceManager.runAs(SecurityServiceManager.java:785)
              >>>>
              >>>> at
              >>>> weblogic.jms.frontend.FESession.producerCreate(FESession.java:604)
              >>>> at weblogic.jms.frontend.FESession.invoke(FESession.java:2246)
              >>>> at
              >>>> weblogic.jms.dispatcher.Request.wrappedFiniteStateMachine(Request.java:552)
              >>>>
              >>>> at
              >>>> weblogic.jms.dispatcher.DispatcherImpl.dispatchSync(DispatcherImpl.java:275)
              >>>>
              >>>> at
              >>>> weblogic.jms.client.JMSSession.createProducer(JMSSession.java:1461)
              >>>> at
              >>>> weblogic.jms.client.JMSSession.createSender(JMSSession.java:1312)
              >>>>
              >>>> Should I have some kind of recovery logic on my client to make
              >>>> this stuff work?
              >>>>
              >>>> Bob.
              >>>
              >>>
              >>
              >
              

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