Cisco Cisco SG300-28 28-Port Gigabit Managed Switch Maintenance Manual

Configuring CDP

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Cisco Small Business 200, 300 and 500 Series Managed Switch Administration Guide (Internal Version) 

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CoS for Untrusted Ports TLV

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CoS for Untrusted Ports—If Extended Trust is disabled on the port, this 
fields displays the Layer 2 CoS value, meaning, an 802.1D/802.1p priority 
value. This is the COS value with which all packets received on an 
untrusted port are remarked by the device.

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Power TLV

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Request ID—Last power request ID received echoes the Request-ID 
field last received in a Power Requested TLV. It is 0 if no Power 
Requested TLV was received since the interface last transitioned to Up. 

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Power Management ID—Value incremented by 1 (or 2, to avoid 0) each 
time any one of the following events occur:

Available-Power or Management Power Level fields change value

A Power Requested TLV is received with a Request-ID field which is 
different from the last-received set (or when the first value is received)

The interface transitions to Down

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Available Power—Amount of power consumed by port.

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Management Power Level—Displays the supplier's request to the 
powered device for its Power Consumption TLV. The device always 
displays “No Preference” in this field.

The CDP Neighbors Information page displays CDP information received from 
neighboring devices.

After timeout (based on the value received from the neighbor Time To Live TLV 
during which no CDP PDU was received from a neighbor), the information is 
deleted.

To view the CDP neighbors information:

Click Administration > Discovery - CDP > CDP Neighbor Information.

This page contains the following fields for the link partner (neighbor):

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Device ID—Neighbors device ID.