Entering Static Address Entries - Hirschmann RS20 User Manual

Network load control

7.1.4 Entering static address entries

An important function of the device is the filter function. It selects data pack-
ets according to defined patterns, known as filters. These patterns are as-
signed 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 three 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 re-
ceive data packets from which source address
dress 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 trans-
ferred to the dynamic part by the device.
An address entered statically cannot be overwritten through learning.
Note: If the redundancy manager is active, it is not possible to make perma-
nent unicast entries.
Note: This filter table allows you to create up to 100 filters for Multicast
addresses.
94
7.1 Direct packet distribution
(see on page 92 „Multi-ad-
Basic Configuration L2P
Release 4.2 07/08