Pilz PSSnet SHL 8T MRP - Manual (Page 103)

Network load control
104
8.1 Direct packet distribution
PSSnet SHL - Basic Configuration
Pilz GmbH & Co. KG, Felix- Wankel Str. 2, 73760 Ostfildern
8.1.4 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:
X Destination address
X Broadcast address
X Multicast address
X 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.
X The management administrator describes the static part of the filter table
(dot1qStaticTable).
X During operation, the device is capable of learning which of its ports re-
ceive data packets from which source address
(see on page 102 „Multi-
address capability“) . This information is written to a dynamic part
(dot1qTpFdbTable).
X 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 ring manager is active, it is not possible to make permanent uni-
cast entries.
Note: This filter table allows you to create up to 100 filters for Multicast
addresses.