Users Guide

Layer 3 Routing Commands 1655
User Guidelines
Start configuring an IP SLA operation by using the ip sla command. This
command specifies an identification number for the operation. Once this
command is entered, the router enters IP SLA configuration mode.
At a minimum, an SLA consists of an operation, a tracking object and one or
more routes. Routes are associated with a tracking object which is mapped to
an operation. Operations may be scheduled. The tracking object maintains
the state of the operation, and the associated routes are withdrawn or added
to the routing table based upon the state of the tracking object. See the track
ip sla command for information on tracking objects.
This command is supported for both IPv4 and IPv6 networks.
The maximum number of IP SLAs supported is 128 (IPv4 and IPv6
combined).
Once an operation is configured it needs to be scheduled to be started. Refer
to the ip sla schedule global configuration command for more details on
scheduling of an operation.
NOTE: The configuration of an operation cannot be modified after an operation has been scheduled
to start. For modifying the configuration after the operation is scheduled, the schedule must be
stopped (using the no ip sla schedule command) or the operation must be deleted (using the
no ip sla command).
To display the current operational state of an IP SLA operation, use the show
ip sla configuration command.
Command History
Command introduced in version 6.6 firmware.
Example
In the following example, operation 55 is configured as a ICMP Echo
operation in an IPv4 network and is scheduled to start. The example shows
the ip sla schedule command being used in an IPv4 network.
console(config)# ip sla 55
console(config-ip-sla)# icmp-echo 172.16.1.175
console(config-ip-sla-echo)# exit
console(config-ip-sla)# exit
console(config)# ip sla schedule 55