RNRP Network Redundancy
Our System has 2 ACS servers and 4 clients (Workgroup). There are two network switches configured as 172.16.4.X and 172.17.4.X. When 172.16.4.1 is disabled, PPA goes down. 172.17.4.1 is not taking up the network.
Also if i open RNRP, only 172.16.4.X series IP's are listed. Why 172.17.4.X IP's are not showing..But im able to ping all machines through both series IP's.
How can i make Sure of network redundancy?
My First Problem- Only 172.16.4.X series IP's are displayed in RNRP. Wherever 172.16.4.X is configured, we have 172.17.4.X as Secondary network. But 172.17.4.X series IP is not displayed in RNRP. why?
Second Problem- When i remove the cable of my Primary network(172.16.4.X), PPA goes down, even though secondary network(172.17.4.X) is healthy. Why?
Voted best answer
Network redundancy requires the secondary network to be reported as "up" by RNRP.
From the description it sounds as the secondary switches are blocking multicasting, eg by having IGMP enabled. RNRP require IGMP to be OFF.
Cisco and Westermo switches come with IGMP ON, Cisco often require Cisco Network Assistant (CNA) software or Command Line Interface (CLI) to disable IGMP. Cisco's built-in web management interface does not show IGMP status.
If ping works with primary network disconnected, an enabled IGMP sounds like a very plausable cause.
NOTE: do not use "disable network adapter" to test RNRP/redundancy. Remove network cable to induce disturbances.