3Com 3500 manual Bridge cos enable

bridge cos enable

3500

✓9000

✓9400

✓3900

✓9300

bridge cos enable 267

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

Enables or disables IEEE 802.1p Class of Service (CoS) on the bridge. Use this feature to help prioritize business-critical or time-sensitive traffic in your network.

Valid Minimum Abbreviation

b c e

Important Considerations

■The opportunity to be processed in the high priority queue exists only for IEEE 802.1Q tagged packets (provided that CoS is enabled) with priority values that match the high priority queue configuration. Non-tagged packets are always processed in the low priority queue, along with tagged packets with priority values that match the low priority queue configuration.

■CoS is enabled by default and initial queue assignments conform with IEEE 802.1p recommendations — that is, priorities 0 – 3 are assigned to the low priority queue and priorities 4 – 7 are assigned to the high priority queue. To modify queue assignments, see “bridge cos modify” later in this chapter.

■If you disable CoS, all tagged and non-tagged traffic is processed through the low priority queue and its buffers. (The high priority queue and buffers are shut off.)

Options

Prompt	Description	Possible Values		[Default]
CoS setting	Whether all bridge ports in the	■	enabled	enabled (factory
	system implement Class of	■	disabled	default), or
	Service			current value