Cisco Catalyst 4500 Series - Analyzing IP Service Levels by Using the ICMP Echo Operation

78-11
Catalyst 4500 Series Switch, Cisco IOS Software Configuration Guide - Cisco IOS XE 3.9.xE and IOS 15.2(5)Ex
Chapter 78 Configuring Cisco IOS IP SLA Operations
Configuring IP SLAs Operations
Type Of Service parameters: 0x0
Verify data: No
Vrf Name:
Control Packets: enabled
Schedule:
Operation frequency (seconds): 30
Next Scheduled Start Time: Pending trigger
Group Scheduled : FALSE
Randomly Scheduled : FALSE
Life (seconds): 3600
Entry Ageout (seconds): never
Recurring (Starting Everyday): FALSE
Status of entry (SNMP RowStatus): notInService
Threshold (milliseconds): 5000
Distribution Statistics:
Number of statistic hours kept: 2
Number of statistic distribution buckets kept: 1
Statistic distribution interval (milliseconds): 20
Enhanced History:
Analyzing IP Service Levels by Using the ICMP Echo Operation
The ICMP echo operation measures end-to-end response time between a Cisco device and any devices
using IP. Response time is computed by measuring the time taken between sending an ICMP echo
request message to the destination and receiving an ICMP echo reply. Many customers use IP SLAs
ICMP-based operations, in-house ping testing, or ping-based dedicated probes for response time
measurements between the source IP SLAs device and the destination IP device. The IP SLAs ICMP
echo operation conforms to the same specifications as ICMP ping testing, and the two methods result in
the same response times.
Note This operation does not require the IP SLAs responder to be enabled.
To configure an ICMP echo operation on the source device, perform this task:
Command Purpose
Step 1
configure terminal
Enters global configuration mode.
Step 2
Switch(config)# ip sla
operation-number
Creates an IP SLAs operation and enter IP SLAs configuration mode.
Step 3
Switch(config-ip-sla)#
icmp-echo
{destination-ip-address |
destination-hostname}
[source-ip {ip-address |
hostname} | source-interface
interface-id]
Configures the IP SLAs operation as an ICMP Echo operation and enter ICMP
echo configuration mode.
• destination-ip-address | destination-hostname—Specify the destination IP
address or hostname.
• (Optional) source-ip {ip-address | hostname}—Specify the source IP
address or hostname. When a source IP address or hostname is not
specified, IP SLAs chooses the IP address nearest to the destination
• (Optional) source-interface interface-id—Specify the source interface for
the operation.
Step 4
Switch(config-ip-sla)#
frequency seconds
(Optional) Sets the rate at which a specified IP SLAs operation repeats. The
range is from 1 to 604800 seconds; the default is 60 seconds.
Step 5
Switch(config-ip-sla)# exit
Exits UDP jitter configuration mode, and return to global configuration mode.