Raisecom
ISCOM2600G-HI (A) Series Configuration Guide
12 System management
Raisecom Proprietary and Confidential
Copyright © Raisecom Technology Co., Ltd.
502
Table 12-2
IEEE 802.1 organization-defined TLVs
Type
Description
Port VLAN ID TLV
VLAN ID on the interface
Port And Protocol VLAN ID TLV
Protocol VLAN ID on the interface
VLAN Name TLV
VLAN name on the interface
Protocol Identity TLV
Type of the protocol supported by the interface
Table 12-3
IEEE 802.3 organization-defined TLVs
Type
Description
MAC/PHY Configuration//Status TLV
Rate and duplex mode of the interface,
whether auto-negotiation is supported or
enabled
Power Via MDI TLV
Power supply capability on the interface
Link Aggregation TLV
Link aggregation capability on the interface
and current link aggregation status
Maximum Frame Size TLV
Size of the maximum frame able to be
transmitted by the interface
Principles
LLDP is a kind of point-to-point one-way issuance protocol, which notifies local device link
status to peer end by sending LLDPDU (or sending LLDPDU when link status changes)
periodically from the local end to the peer end.
The procedure of packet exchange:
When the local device transmits packet, it gets system information required by TLV from
NView NNM (Network Node Management) and gets configurations from LLDP MIB to
generate TLV and form LLDPDU to transmit to peer.
The peer receives LLDPDU and analyzes TLV information. If there is any change, the
information will be updated in neighbor MIB table of LLDP and notifies the NView
NNM system.
When the device status is changed, the ISCOM2600G-HI series switch sends a LLDP packet
to the peer. To avoid sending LLDP packet continuously because of device status changes
frequently, you can configure a delay timer for sending the LLDP packet.
The aging time of Time To Live (TTL) in local device information about the neighbour node
can be adjusted by modifying the parameter values of aging coefficient, sends LLDP packets
to neighbour node, after receiving LLDP packets, neighbour node will adjust the aging time of
its neighbour nodes (sending side) information. Aging time formula, TTL = Min {65535,
(interval × hold-multiplier)}:
Interval indicates the time period to send LLDP packets from neighbor node.