3Com SuperStack 4 Configuration Manual page 203

QoS Configuration
Setting Port Priority
Configuring Trust Packet
Priority
The process of QoS based traffic:
1 Identify the traffic by ACL
2 Perform the QoS operation to the traffic.
The configuration steps of QoS based traffic:
1 Define the ACL
2 Configure the QoS operation
If QoS is not based on traffic, you need not define ACL first.
See "Configuring ACL"
describes how to configue QoS operation.
You can use the following command to set the port priority. The Switch will
replace the 802.1p priority carried by a packet with the port priority by default.
Perform the following configuration in Ethernet Port View.
Table 230 Setting Port Priority
Operation
Set the port priority
Restore the default port priority
The Switch port supports 8 priority levels. You can configure the port priority to
your requirements.
priority-level ranges from 0 to 7.
By default, the port priority is 0 and the Switch replaces the priority carried by a
packet with the port priority.
The system replaces the 802.1p priority carried by a packet with the port priority
by default. The user can configure system trusting the packet 802.1p priority and
not replacing the 802.1p priorities carried by the packets with the port priority.
Perform the following configuration in Ethernet Port View.
Table 231 Configuring Port Priority Replacement
Operation
Configure trust packet 802.1p priority
Configure not trust packet 802.1p priority
Before configuring trust packet 802.1p priority, the Switch puts the packets into
different queues according to the priorities of the received port. After configuring
trust packet 802.1p priority, the Switch will trust the packet 802.1p priority and
put the packet into different queues accordingly, when forwarding the packets.
By default, the system replaces the 802.1p priority carried by a packet with the
port priority.
for information on how to define ACL. This section mainly
Command
priority priority_level
undo priority
Command
priority trust
undo priority
QoS Configuration 215