User Guide

OmniAccess SafeGuard OS Administration Guide
107
Chapter 2: Accessing and Managing the System
lsp recovery-mode
no lsp recovery-mode
This command has no options or parameters.
For example:
(SafeGuardOS) # configure terminal
(SafeGuardOS) (config) # lsp recovery-mode
(SafeGuardOS) (config) #
Changing the Exception Recovery Parameters
Recovery will “permit” a certain rate of exceptions per second, but will not tolerate a
certain number of exceptions over time. This is done with a “leaky bucket” system using
a sustain rate and threshold value. The sustain rate defines how many recoveries per
second the system can sustain. Each second, the recovery quota is increased by the
sustain value. The threshold is the recovery quota’s maximum value. No matter what the
sustain value is, the quota cannot exceed the threshold limit.
For example, to configure up to two recoveries per second to never crash the controller,
but any period of ten seconds when the recoveries happen faster than that to force a
reboot, the solution would look something like this:
■ A threshold of twenty is defined, to indicate that ten seconds of more than two
recoveries each second will reach the threshold between continued operation and
a reboot.
■ A sustain rate of two is defined, to indicate that every second the system can
restore two recoveries to the recovery quota.
The recoveries are defined per group. Traffic passing through the LSP processor is
divided into four groups for processing. These groups are related to the front-panel ports
of the SafeGuard controller.
To change the exception recovery parameters, use the
lsp recovery command in Global
Configuration mode.
lsp recovery [threshold threshold] [sustain sustain]]
For example:
(SafeGuardOS) # configure terminal
(SafeGuardOS) (config) # lsp recovery threshold 20 sustain 2
Syntax Description threshold The maximum value of the recovery quota.
sustain Exceptions credited per second that the
system can sustain.