Cisco WS-X6708-10G-3CXL= - 10 Gigabit Ethernet Module Instrukcja Użytkownika Pobierz pdf (Strona 57)

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VSS(config)#interface range gigabitEthernet 1/5/1 - 3

VSS(config-if-range)#shut

VSS(config-if-range)#exit

VSS(config)#mls qos 10g-only

HWIF-QOS: Queuing qos cfg (wrr-queue/rcv-queue/priority-queue) will be reset to

default on Supervisor Slot 5 interfaces!

VSS(config)#

VSS#sh interfaces tenGigabitEthernet 1/5/4 capabilities | include QOS

QOS scheduling: rx-(8q4t), tx-(1p7q4t)

QOS queueing mode: rx-(cos,dscp), tx-(cos,dscp)

Applying Policies

Classification or policing policies are applied to the system through the Modular QoS CLI (MQC) mechanisms, which

use class maps and policy maps. Each policy map can use multiple class maps to make up a policy map, and you

can define these policy classes for different types of traffic flows.

On the Cisco Catalyst 6500, you can define up to 255 class maps per policy map, with a total of 1024 class maps per

system, implying that across the Virtual Switching System a maximum of 1024 class maps can be supported.

MQC in Cisco IOS Software allows the separation of class maps from policy maps and the separation of these maps

from the application on an interface. The initial release of software also has a limitation in that it allows for only a

limited number of interfaces to be indexed uniquely for QoS purposes. As a result, you can apply QoS policies only

on Layer 3 interfaces (SVIs, physical interfaces, port channels, and so on) and on Layer 2 Cisco EtherChannel links.

In a Cisco Virtual Switching System, application of policies on physical Layer 2 interfaces is now suppo rted in

12.2(33)SXI and above.

Policing

Policing is the process of inspecting whether traffic on a given port or within a VLAN has exceeded a predefined rate.

If that traffic is out of profile (that is, the rate of the traffic stream exceeds the predefined rate), either excess data can

be dropped or its priority value marked down.

Two types of policers are supported on the Cisco Catalyst 6500 Series Switches: aggregate policers and microflow

policers. Although you can implement both types, they are subject to different caveats in a Cisco Virtual Switching

System environment. The next section addresses some of these caveats relating to policers.

Aggregate Policing

Aggregate policers limit the amount of traffic received or transmitted in or out a port. The aggregate policer app lies to

all traffic on a port or VLAN that matches a specified QoS ACL. If the aggregate policer is applied to a single

interface, it counts all matching traffic (that matches the classifying ACL) coming into the interface toward the policer.

If the aggregate policer is applied to a VLAN, then all of the matching traffic coming in any of the ports in that VLAN is

counted toward the stated rate.

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Cisco WS-X6708-10G-3CXL= - 10 Gigabit Ethernet Module Instrukcja Użytkownika Strona 57