Edge-Core ES4524M-PoE, Руководство по управлению, Страница: 223 / 560

Link Layer Discovery Protocol
3-179
address should be the MAC address for the CPU or for the port sending this
advertisement.
The management address TLV may also include information about the specific
interface associated with this address, and an object identifier indicating the type
of hardware component or protocol entity associated with this address. The
interface number and OID are included to assist SNMP applications in the
performance of network discovery by indicating enterprise specific or other
starting points for the search, such as the Interface or Entity MIB.
Since there are typically a number of different addresses associated with a
Layer 3 device, an individual LLDP PDU may contain more than one
management address TLV.
Every management address TLV that reports an address that is accessible on a
port and protocol VLAN through the particular port should be accompanied by a
port and protocol VLAN TLV that indicates the VLAN identifier (VID) associated
with the management address reported by this TLV.
- System Name – The system name is taken from the sysName object in
RFC 3418, which contains the system’s administratively assigned name. To
configure the system name, see “Displaying System Information” on page 3-11.
- System Capabilities – The system capabilities identifies the primary function(s)
of the system and whether or not these primary functions are enabled. The
information advertised by this TLV is described in IEEE 802.1AB.
• MED TLV Type – Configures the information included in the MED TLV field of
advertised messages.
- Port Capabilities – This option advertises LLDP-MED TLV capabilities, allowing
Media Endpoint and Connectivity Devices to efficiently discover which
LLDP-MED related TLVs are supported on the switch.
- Network Policy – This option advertises network policy configuration
information, aiding in the discovery and diagnosis of VLAN configuration
mismatches on a port. Improper network policy configurations frequently result
in voice quality degradation or complete service disruption.
- Location – This option advertises location identification details.
- Extended Power – This option advertises extended Power-over-Ethernet
capability details, such as power availability from the switch, and power state of
the switch, including whether the switch is operating from primary or backup
power (the Endpoint Device could use this information to decide to enter power
conservation mode). Note that this device does not support PoE capabilities.
- Inventory – This option advertises device details useful for inventory
management, such as manufacturer, model, software version and other
pertinent information.
• Trunk - Specifies if the port is a member of a trunk.