Coyote Point Systems Equalizer GX Series, Administration Manual

Page: 543 / 866

Server / Gateway Availability Constraint
For failover to initialize correctly, at least one server or gateway configured on a subnet
defined on Equalizer must be responding to ARP (Address Resolution Protocol) requests.
Otherwise, Equalizer will remain in the "initializing" failover state and will not assume the
backup or primary role.
You can check server availability status in eqcli using this command:
eqcli > server server_name stats
Server availability can also be checked in the GUI by looking at the icons next to the server name
in the left pane object tree. Unavailable servers have an exclamation point icon displayed to the
right of the server name.
Failover Peer Probes and Timeouts
When Equalizers are configured into a failover group, they continually probe (or heartbeat) each
other so that a backup peer can assume the primary role, should the active primary unit become
unreachable.
Heartbeat probes are performed over a long-lived TCP connection. Whenever Equalizer starts
heartbeating a peer, it opens a heartbeat connection to the peer which remains open for as long
as the two systems are operational and have network connectivity. All heartbeats between the
two peers will occur over this long-lived connection.
Once failover is configured, it is the system with the "greater" system ID that always starts
the heartbeating process. For example, of one "sysid" is "003048BC2C8A" and the other is
"003048D52AA2". The second "sysid" has a higher hex value and will start the heartbeating
process.
Failover Timeout Parameters
Heartbeat timeout probes are configured using the following parameters and are defined at the
peer levels.
To access these timeouts using the GUI, log in and select the
System
configuration tab the then
select the arrow (
u
) next to
Failover
to expand the branch. Click on
Peers
to display the
Failover >
Parameters
screen. Use the sliders to adjust timeouts.
To configure timeouts using the CLI, log in and access the peer context. Configure the timeouts
using the guidelines and parameters descriptions below and also in
"Peer Commands"
on page 195.
GUI Parameter (CLI Parameter) Description
Heartbeat Interval
(
hb_interval )
The time in seconds (default:2) between sending and receiving heartbeat
probes between Equalizer and a peer. Each peer expects to receive a heart-
beat probe from other peers that have a failover IP address on a subnet
within this interval.
Copyright © 2014 Coyote Point Systems, A Subsidiary of Fortinet, Inc.
All Rights Reserved. 543
Equalizer Administration Guide