72-4
Type
Description
Remarks
Port Description
Port description of the sending port.
System Name
Assigned name of the sending device.
System Description
Description of the sending device.
System Capabilities
Identifies the primary functions of the sending device and
the primary functions that have been enabled.
Management
Address
Management address used to reach higher level entities to
assist discovery by network management, and the interface
number and OID (object identifier) associated with the
address.
Optional
2) IEEE 802.1 organizationally specific TLVs
Table 72-4
IEEE 802.1 organizationally specific TLVs
Type
Description
Port VLAN ID
PVID of the sending port
Port And Protocol VLAN ID
Port and protocol VLAN IDs
VLAN Name
A specific VLAN name on the port
Protocol Identity
Protocols supported on the port
Currently, 3Com switches 4500 support receiving but not sending protocol identity TLVs.
3) IEEE 802.3 organizationally specific TLVs
Table 72-5
IEEE 802.3 organizationally specific TLVs
Type
Description
MAC/PHY
Configuration/Status
Contains the rate and duplex capabilities of the sending port, support
for auto negotiation, enabling status of auto negotiation, and the
current rate and duplex mode.
Power Via MDI
Contains Power supply capability of the port, including the PoE type
(PSE or PD), PoE mode, support for the PSE power supply, whether
PSE power supply is enabled, and whether the PoE mode is
controllable.
Link Aggregation
Indicates the support of the port for link aggregation, the aggregation
capability of the port, and the aggregation status (that is, whether the
link is in an aggregation).
Maximum Frame Size
Indicates the supported maximum frame size. It is now the MTU of the
port.
