Entering Static Address Entries - Hirschmann MACH 4000 User Manual

Network load control

8.1.4 Entering static address entries

One of the most important functions of a Switch 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
Switch at a port is compared with the patterns. If there is a pattern that match-
es the data packet, a Switch 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, a Switch is capable of learning which of its ports receive
data packets from which source 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 trans-
ferred to the dynamic part by the Switch.
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 ad-
dresses.
4
8.1 Direct packet distribution
(see on page 2 "Multi-address
Basic - L3P
Release 4.0 11/07