1-17
IM AQ1300-01EN
Features
3
2
1
4
5
6
7
8
9
10
11
12
13
14
15
16
App
Index
Sequence Measurement
The AQ1300/AQ1301 monitors the sequence numbers inserted in frames and takes sequence error
statistics for loss packets, maximum burst loss, reorder packets, and duplicate packets.
When the test mode is Traffic Test, all the ports are measured together. When the test mode is QoS
test, the channels are measured separately.
Detected Sequence Errors
Detected Error Type
Error Description
Loss Packet
The total number of lost frames
Max Burst Loss
The maximum number of consecutive frames that have been lost
Reorder Packet
The total number of frames that have been received out of the order that they
were sent in
Duplicate Packet
The number of received frames that have been received again
Sequence Error Detection Examples
Loss Packet
Frames that were sent but not received are counted as loss packets. The Loss Packet number
represents the total number of loss packets.
1 2 3 4 5 6
8 9 10
12 13 14 15 16
20 21 22 23 24
Loss
1
Loss
1
Burst loss
3
Loss Packet:
5
Max Burst Loss: 3
Reorder Packet: 0
Duplicate Packet: 0
Note
• Burst loss packets are also counted as loss packets.
• Reorder packets are not counted as loss packets.
Max Burst Loss
Consecutive frames that the AQ1300/AQ1301 is unable to receive are counted as burst loss
packets. The Max Burst Loss number represents the maximum burst loss value.
1 2 3 4 5 6
8 9
14 15 16
20
Loss
Burst loss
Loss Packet:
5
Max Burst Loss: 4
Reorder Packet: 0
Duplicate Packet: 0
17 18 19
1
4
Note
Reorder packets do not affect the measurement of the maximum burst loss.
1.7 Reception Features
