IP SLA

IP Service Level Agreement

4.6a Overview (not on blueprint)

General information on “IP SLA”:

• Frequency defines the time interval between subsequent IP SLA operations
• Timeout defines the maximum amount of time to wait for a response of an IP SLA operation
• Threshold defines the maximum amount of time before a warning (“Over threshold”) is displayed

4.6.a i ICMP probes

General information about “IP SLA ICMP probes”:

• Two types of ICMP probes possible:
  • icmp-echo (= ping), no responder required
  • icmp-jitter (= variance of latency over timer), less accurate than udp-jitter, no responder required

“IP SLA ICMP probes” CLI configuration commands:

## Configuring a basic ICMP echo IP SLA
Router(config)# ip sla <id>
Router(config-ip-sla)# icmp-echo <ip> [source-ip <ip>] [source-interface <if>]

## Configuring a basic ICMP jitter IP SLA
Router(config)# ip sla <id>
Router(config-ip-sla)# icmp-jitter <ip> [source-ip <ip>]

## Starting a basic ICMP IP SLA
Router(config)# ip sla schedule <id> life [forever | seconds] start-time [now | after hh:mm:ss | hh:mm | hh:mm:ss | pending] ageout [seconds] recurring

“IP SLA ICMP probes” CLI show commands:

## Showing parameters of all configured IP SLAs
Router# show ip sla configuration

## Showing statistics of a specific IP SLAs
Router# show ip sla statistics <id>

4.6.a ii UDP probes

General information on “IP SLA UDP probes”:

• Two types of UDP probes possible:
  • udp-echo (= end-to-end response time), responder required
  • udp-jitter (= variance of latency over timer), designed for real-time traffic like VoIP, no responder required

“IP SLA UDP probes” CLI configuration commands:

## Configuring a basic UDP echo IP SLA
Router(config)# ip sla <id>
Router(config-ip-sla)# udp-echo <ip> <port>

## Configuring a basic UDP jitter IP SLA
Router(config)# ip sla <id>
Router(config-ip-sla)# udp-jitter <ip> <port>

## Configuring a basic UDP IP SLA responder
Router(config)# ip sla responder

## Starting a basic UDP IP SLA
Router(config)# ip sla schedule <id> life [forever | seconds] start-time [now | after hh:mm:ss | hh:mm | hh:mm:ss | pending] ageout [seconds] recurring

“IP SLA UDP probes” CLI show commands:

## Showing parameters of all configured IP SLAs
Router# show ip sla configuration

## Showing statistics of a specific IP SLAs
Router# show ip sla statistics <id>

4.6.a iii TCP probes

General information on “IP SLA TCP probes”:

• One type of TCP probes available:
  • tcp-connect (= connection test on specific port), responder required

“IP SLA TCP probes” CLI configuration commands:

## Configuring a basic TCP connect IP SLA
Router(config)# ip sla <id>
Router(config-ip-sla)# tcp-connect <ip> <port>

## Configuring a basic TCP IP SLA responder
Router(config)# ip sla responder

## Starting a basic TCP IP SLA
Router(config)# ip sla schedule <id> life [forever | seconds] start-time [now | after hh:mm:ss | hh:mm | hh:mm:ss | pending] ageout [seconds] recurring

“IP SLA TCP probes” CLI show commands:

## Showing parameters of all configured IP SLAs
Router# show ip sla configuration

## Showing statistics of a specific IP SLAs
Router# show ip sla statistics <id>