Alcatel 9000 Betriebsanweisung PDF herunterladen (Seite 529)

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Configuring QoS QoS Ports and Queues

OmniSwitch 6800/6850/9000 Network Configuration Guide June 2006 page 26-23

Configuring Trusted Ports

By default, all ports (except 802.1Q-tagged ports and mobile ports) are untrusted. The trust setting may be

configured globally on the switch, or on a per-port basis.

To configure the global setting on the switch, use the qos trust ports command. For example:

-> qos trust ports

To configure individual ports as trusted, use the qos port trusted command with the desired slot/port

number. For example:

-> qos port 3/2 trusted

The global setting is active immediately; however, the port setting requires qos apply to activate the

change. For more information about the qos apply command, see “Applying the Configuration” on

page 26-47.

Using Trusted Ports With Policies

Whether or not the port is trusted is important if you want to classify traffic with 802.1p bits. If the policy

condition specifies 802.1p, the switch must be able to recognize 802.1p bits. (Note that the trusted port

must also be 802.1Q-tagged as described in “Configuring the Egress Queue Minimum/Maximum Band-

width” on page 26-22.)

802.1p bits may be set or mapped to a single value using the policy action 802.1p command. In this

example, the qos port command specifies that port 2 on slot 3 will be able to recognize 802.1p bits. A

policy condition (Traffic) is then created to classify traffic containing 802.1p bits set to 4 and destined for

port 2 on slot 3. The policy action (SetBits) specifies that the bits will be reset to 7 when the traffic

egresses the switch. A policy rule called Rule2 puts the condition and the action together.

-> qos port 3/2 trusted

-> policy condition Traffic destination port 3/2 802.1p 4

-> policy action SetBits 802.1p 7

-> policy rule Rule2 condition Traffic action SetBits

To activate the configuration, enter the qos apply command. For more information about the qos apply

command, see “Applying the Configuration” on page 26-47.

For actions that set 802.1p bits, note that a limited set of policy conditions are supported. For information

about which conditions may be used with an 802.1p action, see “Condition Combinations” on page 26-6

and “Action Combinations” on page 26-8.

Note. 802.1p mapping may also be set for Layer 3 traffic, which typically has the 802.1p bits set to zero.

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