Entering Static Addresses - Hirschmann RS20 User Manual

Network Load Control
8.1.4

Entering Static Addresses

An important function of the device is the filter function. It selects data
packets according to defined patterns, known as filters. These patterns are
assigned distribution rules. This means that a data packet received by a
device at a port is compared with the patterns. If there is a pattern that
matches the data packet, a device then sends or blocks this data packet
according to the distribution rules at the relevant ports.
The following are valid filter criteria:

Destination address
 Broadcast address

Multicast address

VLAN membership
The individual filters are stored in the filter table (Forwarding Database,
FDB). It consists of 3 parts: a static part and two dynamic parts.
 The management administrator describes the static part of the filter table
(dot1qStaticTable).
 During operation, the device is capable of learning which of its ports
receive data packets from which source address
Address Capability"). This information is written to a dynamic part
(dot1qTpFdbTable).
 Addresses learned dynamically from neighboring agents and those
learned via GMRP are written to the other dynamic part.
Addresses already located in the static filter table are automatically
transferred to the dynamic part by the device.
An address entered statically cannot be overwritten through learning.
Note: If the ring manager is active, it is not possible to make permanent
unicast entries.
Note: The filter table allows you to create up to 100 filter entries for Multicast
addresses.
114
8.1 Direct Packet Distribution
(see on page 112 "Multi-
UM BasicConfig L2E
Release 8.0 05/2013