54
Cisco 3900 Series, Cisco 2900 Series, and Cisco 1900 Series Integrated Services Routers Generation 2 Software Configuration Guide
Chapter Configuring Ethernet CFM and Y.1731 Performance Monitoring on Layer 3 Interfaces
Support for Y.1731 Performance Monitoring on a Routed Port (L3 Subinterface)
Support for Y.1731 Performance Monitoring on a Routed Port (L3
Subinterface)
Y.1731 Performance Monitoring (PM) provides a standard Ethernet PM function that includes
measurement of Ethernet frame delay, frame delay variation, frame loss, and frame throughput
measurements specified by the ITU-T Y-1731 standard and interpreted by the Metro Ethernet Forum
(MEF) standards group.
Note
This feature is supported only if you have purchased the DATA technology package functionality
(
datak9
) licensing package. For more information about managing software activation licenses on the
Cisco ISR and Cisco ISR G2 platforms, see
http://www.cisco.com/en/US/docs/routers/access/sw_activation/SA_on_ISR.html
.
Frame Delay
Ethernet frame delay measurement is used to measure frame delay and frame delay variations. Ethernet
frame delay is measured using the Delay Measurement Message (DMM) method.
Restrictions for Configuring Two-Way Delay Measurement
Follow the guidelines and restrictions listed here when you configure two-way delay measurement:
•
Y.1731 PM measurement works only for a point-to-point network topology.
•
The granularity of the clock for delay measurement is in seconds and nanoseconds.
•
CFM Y.1731 packets work with a maximum of two VLAN tags. The expected behavior is not
observed with more VLAN tags. Also, CFM Y.1731 packets do not work with untagged cases.
Configuring Two-Way Delay Measurement
The following steps show how to configure two-way delay measurement. Both single and double tagging
methods are included in the steps listed below.
SUMMARY STEPS
Step 1
enable
Step 2
configure terminal
Step 3
ip sla
operation number
Step 4
ethernet
y1731
delay
DMM
domain
value
vlan
vlan-id
mpid
value
cos
value
source
mpid
value
or
ethernet
y1731 delay
DMM
domain
value
vlan
vlan-id
inner-vlan
inner vlan-id
mpid
value
cos
value
source
mpid
value
Step 5
aggregate
interval
seconds
Step 6
exit
Step 7
ip sla schedule
operation number
start-time
{
start time | now
}