Tcp Congestion Avoidance - Cisco 500 Series Administration Manual

Quality of Service
Configuring QoS - General
STEP 1
STEP 2
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STEP 1
STEP 2
Cisco 500 Series Stackable Managed Switch Administration Guide
To define the VLAN ingress rate limit:
Click Quality of Service > General > VLAN Ingress Rate Limit.
This page displays the VLAN Ingress Rate Limit Table.
Click Add.
Enter the parameters.
• VLAN ID—Select a VLAN.
• Committed Information Rate (CIR)—Enter the average maximum amount
of data that can be accepted into the VLAN in Kilobytes per second.
• Committed Burst Size (CBS)—Enter the maximum burst size of data for the
egress interface in bytes of data. This amount can be sent even if it
temporarily increases the bandwidth beyond the allowed limit. Cannot be
entered for LAGs.
Click Apply. The VLAN rate limit is added, and the Running Configuration file is
updated.

TCP Congestion Avoidance

The TCP Congestion Avoidance page enables activating a TCP congestion
avoidance algorithm. The algorithm breaks up or avoids TCP global
synchronization in a congested node, where the congestion is due to various
sources sending packets with the same byte count.
To configure TCP congestion avoidance:
Click Quality of Service > General > TCP Congestion Avoidance.
Click Enable to enable TCP congestion avoidance, and click Apply.
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