3Com 3500 manual Bridge cos summary, Fields in the Bridge CoS Summary Display

268CHAPTER 9: BRIDGE-WIDE PARAMETERS

bridge cos summary

3500

✓9000

✓9400

✓3900

✓9300

For CoreBuilder 9000: Applies to Layer 2 switching modules only.

Displays whether Class of Service (CoS) is enabled or disabled; shows how the eight possible priority values are assigned (or, if CoS is disabled, how they were last assigned) to the two queues; and shows the rate limit that exists on the high priority queue (queue 1).

Valid Minimum Abbreviation

b c s

Important Considerations

■By default, CoS is enabled and the eight priority values (traffic classes 0 – 7) are divided between the two queues in accordance with IEEE 802.1p recommendations — that is, queue 1 (high priority) has classes 4, 5, 6, and 7 and queue 2 (low priority) has classes 0, 1, 2, and 3.

■If CoS is disabled (indicated at the top of the display), the display reflects the most recent configuration even though it is no longer active.

Options

Prompt Description Possible Values [Default]

Queue	Number of the queue for
index	which you want to see
number	information

■ 1 –

■2

■all

Fields in the Bridge CoS Summary Display

Field	Description
Queue	Number of the queue. Queue 1 is always the high priority
	queue. Queue 2 is always the low priority queue.
Rate limit	Percentage of traffic allowed on the high priority queue.
	See the Implementation Guide for your system for more
	information about the rate limit option.
Traffic classes	Priority values assigned to each queue. The IEEE 802.1p
	standard specifies eight possible values (0 – 7), each of
	which is intended to signify a certain kind of traffic.