Classification Of Traffic; Default Priority - Avaya P580 User Manual

Classification of Traffic

Default Priority

Document No. 650-100-700, Issue 1
The switch assigns traffic to one of eight queues according to the priority, or
"class," of the traffic. Priorities range 0 to 7, 7 being the highest priority.
You can set the switch to classify traffic by the priority assigned to the
following characteristics:
Layer 2 characteristics:
Physical port that the frame or packet is received on
—
Cisco ISL tag or 802.1p tag
—
Source MAC address
—
Destination MAC address
—
Layer 3 characteristics:
DSCP in the packet
—
New DSCP that replaces the original DSCP. You specify this
—
new DSCP.
IP protocol (assigned by means of an ACL rule)
—
Destination IP address (assigned by means of an ACL rule)
—
Source IP address (assigned by means of an ACL rule)
—
Layer 4 characteristics:
Destination TCP or UDP port (assigned by means of an ACL
—
rule)
Source TCP or UDP port (assigned by means of an ACL rule)
—
By default, the switch uses the priority from the 802.1p tag field, if present,
to classify a frame.
If you do not change any of the QoS default settings and the frame does not
have an 802.1 tag or Cisco ISL tag, the switch assigns the priority of the
physical port to the packet. Each physical port has a default priority of 3.
For information on how to change the priority for a physical port, see
"Setting the Priority of a Physical Port" later in this chapter.
80-Series QoS
25-7