Cisco CATALYST 2960

33-23
Catalyst 2960 and 2960-S Switches Software Configuration Guide, Release 15.0(1)SE
OL-26520-01
Chapter 33 Configuring QoS
Configuring Auto-QoS
For information about the trusted boundary feature, see the “Configuring a Trusted Boundary to
Ensure Port Security” section on page 39-42.
When you enable auto-QoS by using the auto qos voip cisco-phone, the auto qos voip cisco-softphone,
or the auto qos voip trust interface configuration command, the switch automatically generates a QoS
configuration based on the traffic type and ingress packet label and applies the commands listed in
Table 33-5 to the port.
Enhanced Auto-QoS for Video, Trust, and Classification
Note The enhanced auto-QoS feature is not supported on switches running LAN Lite images.
In Cisco IOS Release 12.2(55)SE, auto-QoS is enhanced to support video. Automatic configurations are
generated that classify and trust traffic from Cisco TelePresence systems and Cisco IP cameras.
When you configure the auto qos {video | classify | trust} enhanced commands on a switch port, this
behavior occurs:
• Auto qos voip generated commands that you configured on the interface before Cisco IOS Release
12.2(55)SE migrate to the enhanced commands.
CoS-to-Ingress
Queue Map
4, 5 (queue 2) 0, 1, 2, 3, 6, 7(queue 1)
CoS-to-Egress
Queue Map
4, 5
(queue 1)
2, 3, 6, 7 (queue 2) 0 (queue 3) 2 (queue 3) 0, 1
(queue 4)
1. VoIP = voice over IP
Table 33-3 Auto-QoS Configuration for the Ingress Queues
Ingress Queue Queue Number CoS-to-Queue Map
Queue Weight
(Bandwidth)
Queue (Buffer)
Size
SRR shared 1 0, 1, 2, 3, 6, 7 70 percent 90 percent
Priority 2 4, 5 30 percent 10 percent
Table 33-4 Auto-QoS Configuration for the Egress Queues
Egress Queue Queue Number CoS-to-Queue Map
Queue Weight
(Bandwidth)
Queue (Buffer) Size
for Gigabit-Capable
Ports
Queue (Buffer)
Size for 10/100
Ethernet Ports
Priority 1 4, 5 up to100 percent 25 percent 15 percent
SRR shared 2 2, 3, 6, 7 10 percent 25 percent 25 percent
SRR shared 3 0 60 percent 25 percent 40 percent
SRR shared 4 1 20 percent 25 percent 20 percent
Table 33-2 Traffic Types, Packet Labels, and Queues (continued)
VoIP
1
Data
Traffic
VoIP Control
Traffic
Routing Protocol
Traffic
STP BPDU
Traffic
Real-Time
Video Traffic All Other Traffic