Configuring Trusted Ports; Using Trusted Ports With Policies - Alcatel OmniSwitch 6800 Series Network Configuration Manual

Configuring QoS
Note About Mobile Ports. Mobile ports cannot be Q-tagged like fixed ports; however, a mobile port will
join a tagged VLAN if tagged traffic for that VLAN comes in on the mobile port and the
command is enabled for that VLAN. For more information about enabling this command, see
"Configuring VLANs."
Ports must be both trusted and configured for 802.1Q traffic in order to accept 802.1p traffic.
The following applies to ports that are trusted (for 802.1p traffic, the ports must also be able to accept
802.1Q packets):
The 802.1p or ToS/DSCP value is preserved.
•
If the incoming 802.1p or ToS/DSCP flow does not match a policy, the switch places the flow into a
•
default queue and prioritizes the flow based on the 802.1p or ToS/DSCP value in the flow.
If the incoming 802.1p or ToS/DSCP flow matches a policy, the switch queues the flow based on the
•
policy action.
The switch may be set globally so that all ports are trusted. Individual ports may be configured to override
the global setting.

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
To configure individual ports as trusted, use the
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
page 21-46.

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
be set or mapped to a single value using the
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
OmniSwitch 6800 Series Network Configuration Guide
qos trust ports
qos port trusted command with the desired slot/port
"Applying the Configuration" on
"Trusted and Untrusted Ports" on page
policy action 802.1p command. In this example, the qos port
November 2004
QoS Ports and Queues
vlan mobile-tag
Chapter 4,
command. For example:
21-20.)802.1p bits may
page 21-21