Quality of Service
QoS Basic Mode
361 Cisco Sx350, SG350X, SG350XG, Sx550X & SG550XG Series Managed Switches, Firmware Release 2.2.5.x
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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:
STEP 1 Click Quality of Service > General > TCP Congestion Avoidance.
STEP 2 Click Enable to enable TCP congestion avoidance, and click Apply.
QoS Basic Mode
This section covers the following topics:
•Overview
• Global Settings
• Interface Settings
Overview
In QoS Basic mode, a specific domain in the network can be defined as trusted. Within that
domain, packets are marked with 802.1p priority and/or DSCP to signal the type of service
they require. Nodes within the domain use these fields to assign the packet to a specific output
queue. The initial packet classification and marking of these fields is done in the ingress of the
trusted domain.
Workflow to Configure Basic QoS Mode
To configure Basic QoS mode, perform the following:
1. Select Basic mode for the system by using the QoS Properties page.
2. Select the trust-behavior using the Global Setting page. The device supports CoS/802.1p
trusted mode and DSCP trusted mode. CoS/802.1p trusted mode uses the 802.1p priority in
the VLAN tag. DSCP trusted mode use the DSCP value in the IP header.
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