Operation Diagnosis
234
9.8
Topology Discovery
UM Basic Configuration L3P
Release
7.1
12/2011
Indication whether a redundancy protocol is enabled at the port, and
which one (e.g. RSTP, HIPER-Ring, FastHIPER Ring, MRP, ring
coupling).
Information about the VLANs installed in the device (VLAN-ID and VLAN
name, irrespective of whether the port is a VLAN participant).
A network management station can query this information from devices that
have LLDP active. This information allows the network management station
to form a description of the network topology.
For information exchanges, the LLDP uses an IEEE MAC address, which
devices do not normally communicate. Devices without LLDP therefore do
not allow support for LLDP packets. If a device without LLDP capability is
located between two devices with LLDP capability, then LLDP information
exchanges are prevented between these two devices. To work 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 therefore able to exchange LLDP
information with each other even across devices that do not have LLDP
capability.
The Management Information Base (MIB) for a Hirschmann device with
LLDP capability holds the LLDP information in the lldp MIB and in the private
hmLLDP.
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