Cache refresh issue with PI Load Balanced HA setup.

Dear Experts,
Wei have installed a HA Load Balanced PI Production Server with the below specifications. Its a four node cluster. Two nodes for Application Cluster and another two nodes for Database Cluster.
Physical Hostname  : axsappci
Virtual Hostname  : axsapp00
Instances         : CI,SCS and ASCS.
Physical Hostname : axsappdi
Virtual Hostname   : axsapp00
Instances          : Dialog instance installed with physical hostname axsappdi
Physical Hostname : axsappd1
Virtual Hostname   : axsappdb
Instances  : DB Instance.
Physical Hostname : axsappd2
Virtual Hostname   : axsappdb
Instances  : Standby DB Instance (passive).
Web Dispatcher Hostname : h2h
Application Switchover : CI,SCS and ASCS to switchover to Node2 and dialog instance Node2 forcing to go down
Database Switchover : DB Instance switchover to Node2 if Node1 fails.
We have changed all the parameters according to note 951910 -> NW2004s High Availability Usage Type PI
I am facing an issue with the cache Notifications in the Integration Repository and Directory. The cache notifications are not happening properly particularly with the ABAP Cache.
I get the below error in my ID when i try to do the manual cache notification.
Unable to notify integration runtime (ABAP) of data changes
Unable to establish http connection "http://h2h:8002/sap/xi/cache?sap-
Kindly assist.
Thanks and Regards

Hi Srikanth,
Thanks for the reply.
I have configured my web disptacher to use default HTTP and HTTPS ports i.e 80 and 443. According to note 951910 i have changed parameters in exchange profile to use these ports.

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