Operation Diagnosis
Basic Configuration
Release
6.0
07/2010
9.8
Topology Discovery
199
X Information about the VLANs which are set up in the switch (VLAN ID and
VLAN name, regardless of whether the port is a VLAN member).
A network management station can call up this information from a device with
LLDP activated. This information enables the network management station
to map the topology of the network.
To exchange information, LLDP uses an IEEE MAC address which devices
do not usually send. For this reason, devices without LLDP support discard
LLDP packets. Thus a non-LLDP-capable device between 2 LLDP-capable
devices prevents LLDP information exchange between these two devices.
To get around this, Hirschmann devices send and receive additional LLDP
packets with the Hirschmann Multicast MAC address 01:80:63:2F:FF:0B.
Hirschmann devices with the LLDP function are thus also able to exchange
LLDP information with each other via devices that are not LLDP-capable.
The Management Information Base (MIB) of an LLDP-capable Hirschmann
device holds the LLDP information in the LLDP MIB and in the private
hmLLDP.
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