Administration: Discovery
Configuring CDP
Cisco Small Business 200 Series Smart Switch Administration Guide 105
9
See Identifying Smartport Type for a description of how CDP is used to identify devices for the Smartport
feature.
To enter CDP general parameters:
STEP 1 Click Administration > Discovery - CDP > Properties.
STEP 2 Enter the parameters.
• CDP Status—Select to enable CDP on the device.
• CDP Frames Handling—If CDP is not enabled, select the action to be taken if a packet that matches
the selected criteria is received:
-
Bridging
—Forward the packet based on the VLAN.
-
Filtering
—Delete the packet.
-
Flooding
—VLAN unaware flooding that forwards incoming CDP packets to all the ports excluding
the ingress ports.
• CDP Voice VLAN Advertisement—Select to enable the device to advertise the voice VLAN in CDP
on all of the ports that are CDP enabled, and are member of the voice VLAN. The voice VLAN is
configured in the Voice VLAN Properties page.
• CDP Mandatory TLVs Validation—If selected, incoming CDP packets not containing the mandatory
TLVs are discarded and the invalid error counter is incremented.
• CDP Version—Select the version of CDP to use.
• CDP Hold Time—Amount of time that CDP packets are held before the packets are discarded,
measured in multiples of the TLV Advertise Interval. For example, if the TLV Advertise Interval is 30
seconds, and the Hold Multiplier is 4, then the LLDP packets are discarded after 120 seconds. The
following options are possible:
- Use Default—Use the default time (180 seconds)
- User Defined—Enter the time in seconds.
• CDP Transmission Rate—The rate in seconds at which CDP advertisement updates are sent. The
following options are possible:
- Use Default—Use the default rate (60 seconds)
- User Defined—Enter the rate in seconds.
• Device ID Format—Select the format of the device ID (MAC address or serial number). The following
options are possible:
- MAC Address—Use the MAC address of the device as the device ID.
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