Cisco Catalyst 3750 Metro - Auto Qos Voip

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Catalyst 3750 Metro Switch Command Reference
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Chapter 2 Catalyst 3750 Metro Switch Cisco IOS Commands
auto qos voip
Table 2-3 shows the generated auto-QoS configuration for the egress queue-set.
Command Modes Interface configuration
Command History
Usage Guidelines Use this command to configure the QoS appropriate for VoIP traffic within the QoS domain. The QoS
domain includes the switch, the interior of the network, and edge devices that can classify inbound traffic
for QoS.
In releases earlier than Cisco IOS Release 12.2(25)EY, auto-QoS configures the switch only for VoIP
with Cisco IP Phones on switch ports.
In Cisco IOS Release 12.2(25)EY or later, auto-QoS configures the switch for VoIP with Cisco IP Phones
on switch and routed ports and for VoIP with devices running the Cisco SoftPhone application. These
releases support only Cisco IP SoftPhone Version 1.3(3) or later. Connected devices must use Cisco Call
Manager Version 4 or later.
To take advantage of the auto-QoS defaults, you should enable auto-QoS before you configure other QoS
commands. You can fine-tune the auto-QoS configuration after you enable auto-QoS.
Ta b l e 2-2 Auto-QoS Configuration for the Ingress Queues
Ingress Queue Queue Number CoS-to-Queue Map
Queue Weight
(Bandwidth)
Queue (Buffer)
Size
SRR
1
shared
1. SRR = shaped round robin. Ingress queues support shared mode only.
1 0, 1 81 percent 67 percent
Priority 2 2, 3, 4, 5, 6, 7 19 percent 33 percent
Ta b l e 2-3 Auto-QoS Configuration for the Egress Queue-Set
Egress Queue
1
1. On an enhanced-services (ES) port, the srr-queue bandwidth shape interface configuration command is not part of the
generated auto qos voip command list.
Queue Number
in the
Queue-Set CoS-to-Queue Map
Queue Weight
(Bandwidth)
Queue (Buffer)
Size
Priority (shaped) 1 5 10 percent 10 percent
SRR shared 2 3, 6, 7 10 percent 10 percent
SRR shared 3 2, 4 60 percent 26 percent
SRR shared 4 0, 1 20 percent 54 percent
Release Modification
12.1(14)AX This command was introduced.
12.2(25)EY The cisco-softphone keyword was added, and the generated auto-QoS
configuration changed.