Extreme Networks 200 Series - Manual (Page 165)

Traffic Groupings
Summit 200 Series Switch Installation and User Guide 163
802.1p Commands
Table 42 shows the command used to configure 802.1p priority. This is explained in more detail in the
following paragraphs.
Configuring 802.1p Priority
When a packet is transmitted by the switch, you can configure the 802.1p priority field that is placed in
the 802.1Q tag. You can configure the priority to be a number between 0 and 7, using the following
command:
config vlan <name> priority <number>
Replacing 802.1p Priority Information
By default, 802.1p priority information is not replaced or manipulated, and the information observed on
ingress is preserved when transmitting the packet. This behavior is not affected by the switching or
routing configuration of the switch.
However, the switch is capable of replacing the 802.1p priority information. To replace 802.1p priority
information, you will use an access list to set the 802.1p value. See Chapter 9, “Access Policies”, for
more information on using access lists. You will use the
set dot1p <dot1p_value> parameter of the
create access list command to replace the value. The packet is then placed on the queue that
corresponds to the new 802.1p value.
Configuring DiffServ
Contained in the header of every IP packet is a field for IP Type of Service (TOS), now also called the
DiffServ field. The TOS field is used by the switch to determine the type of service provided to the
packet.
Table 41: 802.1p Priority Value-to-QoS Profile to Hardware Queue Default Mapping
Priority Value QoS Profile
Hardware Queue
Priority Value
0 Qp1 1
1 Qp2 1
2 Qp3 2
3 Qp4 2
4 Qp5 3
5 Qp6 3
6 Qp7 4
7 Qp8 4
Table 42: 802.1p Configuration Commands
Command Description
config vlan <name> priority <number> Configures the 802.1p priority value for 802.1Q
VLAN tags. The value for
priority is an
integer between 0 and 7.