Filter
Top Products
This parameter allows you to enable/disable SNAP conversion between
token-ring and Ethernet frames. When enabled, the Ethernet network is
treated as an 802.3 network. When disabled, the Ethernet network is
treated as an Ethernet V2 network. Note that the implication of this
parameter is that the Ethernet ports can be either Ethernet V2 or 802.3
but not both.
•
IPX Conversion
When
enabled
, IPX packets are recognized and processed by the module
for bridging between token-ring and Ethernet. If disabled, problems may
arise when IPX stations try to pass data from Ethernet to token-ring
networks.
11.8.5 Filtering for Bridging Functions
When performing transparent bridging (for both TB and SRT) the Multiprotocol
Interconnect module will always use its filtering database to forward or discard
the frames that it receives on each of its TB or SRT (for transparent bridging part
only) ports. Additionally, via configuration parameters, you can define the
following filtering options for each port:
•
Normal or security mode for each TB port and TB part of SRT ports
•
Broadcast/multicast filtering for TB ports and TB part of SRT ports
•
Custom filtering for any bridging port regardless of the bridging type
configured for that port
These filtering options allow you to forward or discard frames based on one or
more filters strung together. If the frame matches the specified filtering criteria,
it may be either discarded or forwarded with a specified priority. The following
sections describe the details of various filtering options provided by the
Multiprotocol Interconnect module.
11.8.5.1 Transparent Bridging Filtering Database
The Multiprotocol Interconnect module provides a global filtering database to
support all the interfaces on the module using transparent bridging and the
transparent bridging part of the source-route transparent bridging. This
database is used to determine which frames are to be forwarded and which
frames are to be discarded by the bridging function in the Multiprotocol
Interconnect module.
This table is updated automatically as new addresses are
learned
by the
Multiprotocol Interconnect module. You can also configure the filtering database
with
permanent
entries.
The contents of the filtering database can be displayed by selecting
Filtering
Database
from the
Bridge Menu
. Figure 157 on page 271 shows an example to
the filtering database which is displayed.
270 8260 Multiprotocol Intelligent Switching Hub