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CDP Aware
Select CDP awareness. The CDP operation is restricted to decoding incoming CDP frames
(The switch doesn't transmit CDP frames). CDP frames are only decoded if LLDP on the port is
enabled. Only CDP TLVs that can be mapped to a corresponding field in the LLDP neighbors
table are decoded. All other TLVs are discarded (Unrecognized CDP TLVs and discarded CDP
frames are not shown in the LLDP statistics.). CDP TLVs are mapped onto LLDP neighbors’ table
as shown below.
CDP TLV "Device ID" is mapped to the LLDP "Chassis ID" field.
CDP TLV Address is mapped to the LLDP “Management Address” field. The CDP Address TVL
can contain multiple addresses but only the first address is shown in the LLDP neighbors table.
CDP TLV "Port ID" is mapped to the LLDP "Port ID" field.
CDP TLV "Version and Platform" is mapped to the LLDP "System Description" field.
Both the CDP and LLDP support "system capabilities", but the CDP capabilities cover
capabilities that are not part of the LLDP. These capabilities are shown as "others" in the
LLDP neighbors’ table. If all ports have CDP awareness disabled the switch forwards CDP
frames received from neighbor devices. If at least one port has CDP awareness enabled
all CDP frames are terminated by the switch.
NOTE: When CDP awareness on a port is disabled the CDP information isn't removed
immediately, but gets dropped when the hold time is exceeded.
Port Descr
Optional TLV: When Checked the Port Description is included in LLDP information transmitted.
Sys Name
Optional TLV: When Checked the System Name is included in LLDP information transmitted.
Sys Descr
Optional TLV: When Checked the System Description is included in LLDP information
transmitted.
Sys Capa
Optional TLV: When Checked the System Capability is included in LLDP information
transmitted.
Mgmt Addr
Optional TLV: When checked the “management address” is included in the LLDP information
transmitted.
LLDP-MED Configuration
Media Endpoint Discovery is an enhancement of LLDP, known as LLDP-MED that provides the following facilities:
Auto-discovery of LAN policies (such as VLAN, Layer 2 Priority and Differentiated services (Diffserv) settings)
enabling plug and play networking. Device location discovery to allow creation of location databases and, in the case of
Voice over Internet Protocol (VoIP), Enhanced 911 services. Extended and automated power management of Power
over Ethernet (PoE) end points. Inventory management, allowing network administrators to track their network
devices, and determine their characteristics (manufacturer, software and hardware versions, and serial or asset
number). This page allows configuration of the LLDP-MED. This function applies to VoIP devices which support LLDP-
MED.
To Configure the LLDP-MED in the web interface:
Click Configuration / LLDP / LLDP-MED
Modify Fast start repeat count parameter, default is 4.
Modify Coordinates Location parameters.
Fill Civic Address location parameters.
Add New Policy
Click Apply, will show the following Policy Port Configuration.
Select Policy ID for each port.
Click Apply and click the Save icon in the upper right corner to save the settings.
Summary of Contents for S81
Page 113: ...112 NOTE Click the Port index to set the QoS Egress Port Schedulers...
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