Simple Random Early Detection; Serd Profile - Huawei S1700 Series Web User Manual

S1700 Managed Series Ethernet Switches
Web User Manual
Table 7-6 Parameters of QoS Scheduler
Item
QoS Scheduler
WRR Weight

7.7 Simple Random Early Detection

SRED (Simple Random Early Detection) is a simple mechanism for avoiding congestion,
which randomly discards some specified color of message to actively manage queue to keep
the queue size in a reasonable level to avoid congestion.

7.7.1 SERD Profile

Click QoS > SRED> SRED Profile to view SRED Profile on switch; the configuration page is
shown as the figure below.
Figure 7-8 SRED Profile
Create a SRED Profile
Step 1 Click QoS > SRED, and then click SRED Profile in Tab.
Step 2 Click New button to open the following page.
Issue 05 (2012-10-25)
Description
Supports SP and WRR scheduler mode:
For SP mode, the switch will firstly transmit data of high priority
queue, and transmit low priority queue packets only at the finishing
time of empting high priority queue. For WRR mode, the packet that
can be transmitted for each queue per time is decided by the set
weight.
When schedule WRR, range of this hardware queue weight is 0-127.
Queue weight of 0 is scheduled with SP mode.
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7 QoS Configuration
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