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High Availability (HA)
Feature Description
3
Prerequisites
There are some prerequisites to be aware of before setting up HA:
Two LoadMasters must be set up and licensed
LoadMasters must be located on the same subnet in order to be in a HA pair
LoadMasters must be in the same physical location
A layer 2 connection (Ethernet/VLAN) is required
The LoadMasters must not be located further than 100 meters from each other
Ensure that you have more than one interconnection between the two LoadMasters to
avoid data or lack of availability
The two LoadMasters need the same default gateway
Use Network Time Protocol (NTP) to keep times on LoadMasters up-to-date. This
ensures that the times will be correct on any logs and that Common Address
Redundancy Protocol (CARP) message timestamps are in sync.
Ensure that any switches do not prevent MAC spoofing
Latency on the link between the two LoadMasters must be below 100 milliseconds
Multicast traffic flow is required in both directions between the devices
The appropriate LoadMaster license should be in place
Three IP addresses are required for each subnet in which the LoadMaster is configured
