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PowerConnect B-Series FCX Configuration Guide 597
53-1002266-01
Assigning QoS priorities to traffic
17
When you change the priority, you specify a number from 0 through 7. The priority number specifies
the IEEE 802.1 equivalent to one of the eight QoS queues on Dell PowerConnect devices. The
numbers correspond to the queues as shown in Table 98.
Although it is possible for a packet to qualify for an adjusted QoS priority based on more than one of
the criteria listed In the section above, the system always gives a packet the highest priority for
which it qualifies. Thus, if a packet is entitled to the premium queue because of its IP source and
destination addresses, but is entitled only to the high queue because of its incoming port, the
system places the packet in the premium queue on the outgoing port.
Changing a port priority
To change the QoS priority of port 1/1 to the premium queue (qosp7), enter the following
commands.
PowerConnect(config)#interface ethernet 1/1
PowerConnect(config-if-e1000-1/1)#priority 7
The device will assign priority 7 to untagged switched traffic received on port 1/1.
Syntax: [no] priority <num>
The <num> variable can be from 0 through 7 and specifies the IEEE 802.1 equivalent to one of
eight QoS queues listed in Table 98.
Assigning static MAC entries to priority queues
By default, all MAC entries are in the best-effort queue. When you configure a static MAC entry, you
can assign the entry to a higher QoS level.
To configure a static MAC entry and assign the entry to the premium queue, enter commands such
as the following.
PowerConnect(config)#vlan 9
PowerConnect(config-vlan-9)#static-mac-address 1145.1163.67FF ethernet 1/1
priority 7
PowerConnect(config-vlan-9)#write memory
Syntax: [no] static-mac-address <mac-addr> ethernet <port> [priority <num>]
[host-type | router-type | fixed-host]
Specify the <port> variable in the following formats:
• PowerConnect B-Series FCX stackable switches – <stack-unit/slotnum/portnum>
The priority <num> variable can be from 0 through 7 and specifies the IEEE 802.1 equivalent to
one of the eight QoS queues.
NOTE
The location of the static-mac-address command in the CLI depends on whether you configure
port-based VLANs on the device. If the device does not have more than one port-based VLAN (VLAN
1, which is the default VLAN containing all ports), the static-mac-address command is at the global
CONFIG level of the CLI. If the device has more than one port-based VLAN, then the
static-mac-address command is not available at the global CONFIG level. In this case, the command
is available at the configuration level for each port-based VLAN.