Displaying The Topology Discovery Results - Hirschmann RS20 User Manual

Operation Diagnosis

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.
9.7.2

Displaying the Topology Discovery Results

 Select the Diagnostics:Topology Discovery dialog.
The table on the "LLDP" tab page shows you the collected LLDP
information for neighboring devices. This information enables the
network management station to map the structure of your network.
Activating "Display FDB entries" below the table allows you to add
entries for devices without active LLDP support to the table. In this case,
the device also includes information from its FDB (forwarding
database).
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9.7 Topology Discovery
UM BasicConfig L2E
Release 8.0 05/2013