Entering Static Address Entries - Hirschmann MS30, Power MICE, MACH 4000, OCTOPUS User Manual

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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 certain defined patterns called filters. These
patterns are associated with switching rules. This means that a data packet
received at the port of a Switch is compared to the patterns. If there is a
pattern which matches the data packet, the Switch will either transmit or re-
ject the packet according to the switching rules for the affected ports.
The following are valid filter criteria:
D
Destination address,
D
Broadcast address,
D
Multicast address,
D
VLAN membership.
The individual filters are stored in the filter table (Forwarding Database,
FDB). The table has three parts, a static part and two dynamic parts.
D
The management administrator describes the static part of the filter table
(dot1qStaticTable).
D
During operation, the Switch is capable of learning which ports will receive
data packets from which source addresses (see
on page 102). This information is stored in the dynamic part of the table
(dot1qTpFdbTable).
D
Addresses learned from the neighbouring agent and those learned by
GMRP are written to another dynamic part.
Addresses already located in the static filter table, are automatically
transferred by a Switch into the dynamic part.
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: In the filtering database you can create up to 100 filter for multicast
addresses.
104
8.1 Directed frame forwarding
"Multi-address capability"
Layer 2 Enhanced with Layer 2 Professional
Release 1.0 10/05