Cisco Catalyst 2960 Series, Configuration Manual

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When QoS is enabled using the mls qos global configuration command and all other QoS settings are at their
defaults, traffic is classified as best effort (the DSCP and CoS value is set to 0) without any policing. No
policy maps are configured. The default port trust state on all ports is untrusted.
Related Topics
Enabling QoS Globally, on page 571
Default Egress Queue Configuration, on page 565
Default Ingress Queue Configuration, on page 564
Default Ingress Queue Configuration
The following tables describe the default ingress queue configurations.
The following table shows the default ingress queue configuration when QoS is enabled. For the bandwidth
allocation feature, bandwidth is equally shared between the queues. SRR sends packets in shared mode only.
Queue 2 is the priority queue. SRR services the priority queue for its configured share before servicing the
other queue.
Table 61: Default Ingress Queue Configuration
Queue 2 Queue 1 Feature
10 percent 90 percent Buffer allocation
4 4 Bandwidth allocation
10 0 Priority queue bandwidth
100 percent 100 percent WTD drop threshold 1
100 percent 100 percent WTD drop threshold 2
The following table shows the default CoS input queue threshold map when QoS is enabled.
Table 62: Default CoS Input Queue Threshold Map
Queue ID
–
Threshold ID
CoS Value
1 – 1 0 – 4
2 – 1 5
1 – 1 6, 7
The following table shows the default DSCP input queue threshold map when QoS is enabled.
Consolidated Platform Configuration Guide, Cisco IOS Release 15.2(4)E (Catalyst 2960-X Switches)
564
Information About QoS