CANOGA PERKINS 9145E Standard NID Software Version 1.0 User Manual
Page 47
Diagnostics
9145E NID Software User’s Manual
Latency/Jitter Test
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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.