Figure 4 - 9 In Band Manage Settings
Select the priority and click Apply.
SRED
Simple random early detection (sRED) is a simplified RED mechanism based on ASIC capability. Random Early Detection (RED) is a congestion avoidance mechanism at the gateway in packet switched networks. RED gateways keep the average queue size low while allowing occasional bursts of packets in the queue. The switch provides support for sRED through active queue management by probabilistic dropping of incoming colored packets.
Active queue management is a class of algorithms that attempt to proactively drop or mark frames before congestion becomes excessive. The goal is to detect the onset of persistent congestion and take proactive action so that TCP sources contributing to the congestion back off gracefully, insuring good network utilization while minimizing frame loss.
This proactive approach starts discarding specific colored packets before the packet buffer becomes full. If this queue depth is less than the threshold, there is minimal (or no) congestion and the packet is enqueued. If congestion is detected the packet is dropped or queued based on the DSCP.
SRED Settings
To view this window, click QoS > SRED > SRED Settings as shown below:
Figure 4 - 10 SRED Settings window
The following parameters may be set:
