ZyXEL Communications P-660HN-F1A, User Manual

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Chapter 16 Quality of Service (QoS)
P-660HN-F1A User’s Guide
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16.9 The QoS Monitor Screen
Use this screen to view the P-660HN-F1A’s QoS packet statistics. Click Advanced
> QoS > Monitor. The screen appears as shown.
Figure 117 Advanced > QoS > Monitor
Drop Algorithms Queue management algorithms determine how the P-660HN-F1A
should handle packets when it receives too many (network
congestion).
Drop Tail (DT) is a simple queue management algorithm that allows
the P-660HN-F1A buffer to accept as many packets as it can until it is
full. Once the buffer is full, new packets that arrive are dropped until
there is space in the buffer again (packets are transmitted out of it).
Random Early Detection (RED) is a queue management algorithm
that doesn’t wait until a buffer is full before dropping packets. If the
buffer is almost empty, all incoming packets are accepted. As the
queue grows, the probability for dropping an incoming packet grows
too. When the buffer is full, the probability has reached 1 and all
incoming packets are dropped.
Select RED if your network is usually congested and/or has much
bursty traffic.
Back Click Back to return to the previous screen without saving.
Apply Click Apply to save your changes back to the P-660HN-F1A.
Cancel Click Cancel to begin configuring this screen afresh.
Table 79 QoS Queue Setup: Edit (continued)
LABEL DESCRIPTION