CANOGA PERKINS 9145E NID Software Version 3.0 - Manual (Page 53)

Diagnostics 9145E NID Software User’s Manual
Latency/Jitter Test
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between the local 9145E and the destination 9145E (far end). Only a 9145 or 9145E destination
can provide the Far End PBit/DSCP function.
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.
1. Test IP Addr/VLAN: The destination IP address and VLAN for the currently test or the
last test completed.
2. Round Trip Packets: Number of completed round trips.
3. Test Duration: The length of time the test has been running, or the length of the last test
run.
4. Dropped Packets: Number of packets sent which received no response.
5. Minimum Latency (ms) : Time in ms for the shortest round trip.
6. Minimum Jitter (ms) : Smallest absolute time difference between 2 round trips.
7. Average Latency (ms) : Computed by adding all the round trip latencies and dividing by
the number of completed round trips.
8. Average Jitter (ms) : Computed by adding all the absolute time differences between
successive round trips and dividing by the number of completed round trips minus 1.
9. Maximum Latency (ms) : The highest time interval for a successful round trip.
10. Maximum Jitter (ms) : The highest absolute time difference between 2 successful round
trips.
11. Far End PBit Sent: This is the programmed priority value entered.
12. Far End PBit Rcvd: This is the priority as it was received at the destination 9145/9145E.
13. Local PBit Sent: The programmed priority value is put back into the packet at the far end
for the return trip.
14. Local PBit Rcvd: This is the priority as it was received at the end of the Round Trip.
15. Far End DSCP Sent: This is the programmed DSCP.
16. Far End DSCP Rcvd: This is the DSCP that was received at the destination 9145/
9145E.
17. Local DSCP Sent: The programmed DSCP value is put back into the packet at the far
end for the return trip.
18. Local DSCP Rcvd: This is the DSCP that was received at the end of the Round Trip.