Device Management
Device Discovery Protocols
Cisco ISA500 Series Integrated Security Appliances Administration Guide 433
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-Per Port: Configure CDP on selective ports. CDP per port is
recommended.
•CDP Timer: Enter the value of the time interval between two successive
CDP packets sent by the security appliance. The default value is 60
seconds.
•CDP Hold Timer: The hold timer is the amount of time the information sent
in the CDP packet should be cached by the security appliance that receives
the CDP packet, after which the information is expired. The default value is
180 seconds.
Note: The Voice VLAN ID is a read-only field. You can configure the Vo ice VLAN on
the Networking > VLAN page. For more information, see Configuring a VLAN,
page137.
STEP 3 In the Enable CDP area, specify which interfaces will run CDP. Click On to enable
CDP on an interface, or click Off to disable CDP. This is required if you choose Per
Port from the CDP drop-down list.
STEP 4 Click Save to apply your settings.
LLDP DiscoveryLink Layer Discovery Protocol (LLDP) enables network managers to troubleshoot
and enhance network management by discovering and maintaining network
topologies over multi-vendor environments. LLDP discovers network neighbors by
standardizing methods for network devices to advertise themselves to other
systems, and to store discovered information.
LLDP enables a device to advertise its identification, configuration, and
capabilities to neighboring devices that store the data in a Management
Information Base (MIB). The network management system models the topology of
the network by querying these MIB databases.
STEP 1 Click Device Man agement > Discovery Protocols > LLDP.
STEP 2 Click On to enable LLDP, or click Off to disable it. If you enable LLDP, the LLDP
neighbors appear in the LLDP Neighbors table.
STEP 3 To view the detail of a LLDP neighbor, check it and click Details.
STEP 4 To refresh the data in the LLDP Neighbors table, click Refresh.