Coyote Point Systems Equalizer GX Series, Administration Manual

Page: 643 / 866

Configuring Layer 3 ICMP Probe Parameters
ICMP server probes are configured using the global parameters described in the table below. Each
server is sent ICMP ECHO Request packets by Equalizer and is marked up or down depending upon
whether the server responds or not.
The number of times a server is probed is determined by the ICMP Maximum Tries parameter.
The ICMP Interval parameter is a timer. When the ICMP Interval timer starts, the first ICMP probe
is sent. If the value of ICMP Maximum Tries is greater than 1, the next probe is sent a number of
seconds later equal to:
(ICMP Interval) / (ICMP Maximum Tries)
For example, the default ICMP Interval is "15" and the default ICMP Maximum Tries is "3". So, by
default, an ICMP probe is sent to each server every 5 seconds.
When the ICMP Interval timer expires, a server is marked "up" if a response to any probe sent
during the ICMP Interval was received. A server is marked "down" by lack of a response to an
ICMP probe only if no response is received and the server had been marked "up” at least once
since the last Equalizer reboot. This is to prevent marking a server down when it has been
configured to ignore ICMP ECHO Requests.
GUI Probe Parameter (CLI Probe Parameter) Description
ICMP Probe Maximum Tries (icmp_maxtries)
The maximum number of times per ICMP Probe
Interval that Equalizer will attempt to probe a server.
ICMP Probe Interval (icmp_interval )
A timer specifying the length of time (in seconds) during
which a successful server probe must occur, or the server
is marked "down". At least one ICMP probe of a server
must have succeeded since the last Equalizer reboot, or
failed ICMP probes for the server will be ignored and the
server will be marked "UP."
ICMP Probe Parameters
Setting ICMP Probe Parameters in the GUI
1. Verify that you are logged into the GUI. If not, log in as described in
"Logging In"
on page
230.
2. Select the
System
configuration tab on the left navigational pane if it is not already selected.
3. Click on the arrow (
u
) beside
Global
to expand the branch.
4. Click on
Parameters
to display the
Parameters
screen.
5. Modify the ICMP probe parameter shown in ICMP Probe Parameters as necessary.
6. Click on
Commit
.
Setting ICMP Probe Parameters in the CLI
1. To set ICMP probe parameters in the CLI enter the following command in the global context.
Copyright © 2014 Coyote Point Systems, A Subsidiary of Fortinet, Inc.
All Rights Reserved. 643
Equalizer Administration Guide