Cisco Prime NCS in High Availability Manual Mode

[m0hammadatifbutt]

I just want to confirm what services will be running on Cisco prime NCS on standby box in HA manual mode.

Also the webpage will be accessible on standby box or not?

[Manish Gogna]

Hi,

As per the Prime NCS config guide:

For primary NCS to initiate High Availability with secondary NCS, the status of the secondary NCS services must be running and reachable from the primary NCS. The ports over which the primary and secondary NCSs communicate must be open (not blocked with network firewalls, application fireways, gateways, and so on). The tomcat port is configurable during installation, and its default port is 8082. You should reserve solid database ports from 1315 to 1319. 

http://www.cisco.com/c/en/us/td/docs/wireless/ncs/1-0/configuration/guide/NCS10cg/admin.html#wp1131807

Manish

[m0hammadatifbutt]

Thanks for the reply Manish,

As per link you shared It is stated in it that:

Start the secondary NCS as a standby server. In this mode, the NCS application does not start. At the same time, the Health Monitor is started on the secondary NCS.

Can you confirm which service exactly  running in standby mode.

Also will the webpage accessible on standby box or not?

[Manish Gogna]

Hi,

The only service that will show up as "running" in standby mode is healthmon.  Once the system
fails over, all the other services will also start.

I believe the webpage works but haven't got one to test in the lab.

Manish

[adiazcastro19]

Hello,

Sorry for only one question. When you hace HA configured and working fine, you should access to both? or only to one of then and IP of HA?. That's to say, I have this CPI 3.1

1. 10.0.0.1 == > Active
2. 10.0.0.2 == > Standby
3. 10.0.0.5 == > HA

Is the normal behaviour to have to access only to the active and the HA IP address by https? Because by SSH I can access both (10.0.0.1 and 10.0.0.2).

Thanks

[m0hammadatifbutt]

Also in one of the doc it is stated that: 

high-availability is configured with automatic mode, the following events take place:

1. The primary Prime Infrastructure is confirmed as non functioning (because of a hardware crash or a network crash) by the health monitor on the secondary Prime Infrastructure.

2. The secondary Prime Infrastructure instance is started immediately (using the configuration already in place) and uses the database of the primary. After a successful failover, the client should point to the newly activated Prime Infrastructure (the secondary Prime Infrastructure). The secondary Prime Infrastructure updates all wireless controllers with its own address as the trap destination. For wired devices, the trap destination for the primary and secondary Prime Infrastructure must be configured on the devices.

When failback is initiated, the following events take place:

1. The database information and files are copied to the primary Prime Infrastructure server. The primary server mode changes to Primary Active, and the secondary server mode changes to Secondary Syncing.

2. All processes on the secondary Prime Infrastructure server go down except for the Health Monitor, and all processes on the primary Prime Infrastructure server start.

Please see the following link for further detail:- 

http://www.cisco.com/c/en/us/td/docs/net_mgmt/prime/infrastructure/2-0/administrator/guide/PIAdminBook/config_HA.html#38247