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Configuring Cisco IOS IP SLAs Operations
How to Configure Cisco IOS IP SLAs Operations
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.
How to Configure Cisco IOS IP SLAs Operations
Note: Not all of the IP SLAs commands or operations described in this guide are supported on the switch. The switch
supports IP service level analysis by using UDP jitter, UDP echo, HTTP, TCP connect, ICMP echo, ICMP path echo, ICMP
path jitter, FTP, DNS, and DHCP, as well as multiple operation scheduling and proactive threshold monitoring. It does not
support VoIP service levels using the gatekeeper registration delay operations measurements.
Configuring the IP SLAs Responder
Before You Begin
For the IP SLAs responder to function, you must also configure a source device, such as a Catalyst 3750 or Catalyst 3560
switch running the IP services image, that has full IP SLAs support. Refer to the documentation for the source device for
configuration information.
Configuring UDP Jitter Operation
Before You Begin
Before you configure a UDP jitter operation on the source device, you must enable the IP SLAs responder on the target
device (the operational target).
Command Purpose
1. configure terminal Enters global configuration mode.
2. ip sla responder {tcp-connect |
udp-echo} ipaddress ip-address port
port-number
Configures the switch as an IP SLAs responder.
The optional keywords have these meanings:
tcp-connect—Enables the responder for TCP connect operations.
udp-echo—Enables the responder for User Datagram Protocol (UDP)
echo or jitter operations.
ipaddress ip-address—Enters the destination IP address.
port port-number—Enters the destination port number.
Note: The IP address and port number must match those configured on
the source device for the IP SLAs operation.
3. end Returns to privileged EXEC mode.
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