Are there any latency requirements between a pair of Prime Infrastructure servers configured for HA?

[ramnaray]

Are there any latency requirements between a pair of Prime Infrastructure servers configured for HA? Do we have any recomendation for DR/HA Setup.

[nkavuri]

The Cisco Prime Infrastructure High  Availability (HA) implementation allows for up to two primary Cisco Prime  Infrastructure systems to failover to one secondary (backup) Cisco Prime  Infrastructure system.
Cisco Prime Infrastructure HA can also be deployed  with geographic separation of the primary and secondary servers. This type of  deployment is also known as Disaster Recovery (DR), or Geographic Redundancy.  There are a couple of things to keep in mind when deploying Cisco Prime  Infrastructure in this mode:

- The primary and secondary server can be a  mix of a physical and a virtual appliance.
- The size of the secondary server  must be larger than or equal to that of the primary server
- Must be running  the same version of Cisco Prime Infrastructure on both the primary and secondary  Cisco Prime Infrastructure servers.
- Only one Cisco Prime Infrastructure  server license needs to be purchased. There is no need to purchase a license for  the secondary Cisco Prime Infrastructure server. The secondary server will use  the license from the primary when a failover occurs.

• Bandwidth:  Recommendation is to have 10 Mbps or more; however, we have seen HA used on DSL  links as well. Each deployment is unique, so it's better to test out the  failover scenario just as a sanity check.
• Latency: There is a continuous  heartbeat (every 5 seconds) that happens between the primary and secondary Cisco  Prime Infrastructure servers. Latency cannot be higher than this heartbeat  interval; otherwise the primary server is deemed as a failure by the secondary  server.

[Anil Jacob]

I have a similar implementation with PI 1.3, over a MPLS network. The Bandwidth is over 100 Mbps between the sites although there are other Server's performing replication over the same circuit.

I get the following errors, advise seeking

NCS primary server 'HOST_NAME,IP_ADDRS]' is attempting to register
Sep 18, 2013 07:06:03 PM	Secondary Alone	Decommissioned NCS Server 'hostname [IP_ADDRESS]'
Sep 18, 2013 07:05:50 PM	Secondary Alone	Can not start DB instance: wcss1
Sep 18, 2013 07:03:55 PM	Secondary Alone	NCS primary server 'HOSTNAME[IP_ADDRS' is attempting to register
Sep 18, 2013 07:02:56 PM	Secondary Alone	Decommissioned NCS Server '