CANOGA PERKINS 9145E Standard NID Software Version 1.0 User Manual

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Diagnostics

9145E NID Software User’s Manual

Latency/Jitter Test

The leg of the trip (Local to Far End or Far End to Local) on which the P-Bit remarking or DSCP change is
occurring will be identified. It is assumed that each Latency/Jitter test that is initiated will take a particular
path, so each round trip overwrites the previous round trip values.

Test IP Addr/VLAN - The destination IP address and VLAN for the currently test or the last test
completed.

Round Trip Packets: - Number of completed round trips.

Test Duration: - The length of time the test has been running, or the length of the last test run.

Dropped Packets: - Number of packets sent which received no response.

Minimum Latency (ms) - Time in milliseconds for the shortest round trip.

Minimum Jitter (ms) - Smallest absolute time difference between 2 round trips.

Average Latency (ms) - Computed by adding all the round trip latencies and dividing by the number
of completed round trips.

Average Jitter (ms) - Computed by adding all the absolute time differences between successive
round trips and dividing by the number of completed round trips. Can be zero.

Maximum Latency (ms) - The highest time interval for a successful round trip.

Maximum Jitter (ms) - The highest absolute time difference between 2 successful round trips.

Far End PBit Sent - This is the programmed priority value entered.

Far End PBit Rcvd - This is the priority as it was received at the destination 9145/9145E.

Local PBit Sent - The programmed priority value is put back into the packet at the far end for the
return trip.

Local PBit Rcvd - This is the priority as it was received at the end of the Round Trip.

Far End DSCP Sent - This is the programmed DSCP.

Far End DSCP Rcvd - This is the DSCP that was received at the destination 9145/9145E.

Local DSCP Sent - The programmed DSCP value is put back into the packet at the far end for the
return trip.

Local DSCP Rcvd - This is the DSCP that was received at the end of the Round Trip.