We’ve got a 3 site installation with a primary NPM & a couple of extra polling engines at site 1, a polling engine at site 2 & and other polling engine at site 3. There’s a dedicated SQL server at Site 1. Sites 2 & 3 are firewalled from site 1 and devices are polled from either site 1 engines or site 2/3 engines depending upon which side of the firewall they live.
I want to install a Hot Standby facility, but cannot have polling functions from sites 2 and 3 failing over to a standby in site 1 or vice-versa.
So I need to install two Hot Standby engine, one each side of the firewall. Is this supported?
NPM 9.5.1, APM, NCM, NTA, IPSLA
Yes, you can have a Hot Standby engine on either side of a firewall. In fact, you should have a HSB engine for every polling engine if your want failover protection.
See this Hot-Standby engine for NPM for information on installing HSB engines.