Cabletron Systems CSX1000 - Manual (Page 225)

Workgroup Remote Access Switch 225
C ONFIGURING A DVANCED B RIDGING
Bridge Filters
D ISTRIBUTION L IST
A distribution list is defined as the WAN and/or LAN ports to which the filter action will be
applied. The distribution list is selected from a displayed list of possible choices (LAN, WAN,
Device Table, or all destinations).
M ASK
Hexadecimal number up to 80 characters in length that specifies which bits in the data packets are
significant. There must be an even number of hexadecimal digits in the number. A scale will be
displayed to help you enter the Mask accurately.
D ATA V ALUE
Hexadecimal number up to 80 characters in length that specifies the value used to determine if the
packet matches the filter. The value field must be a subset of the mask field. That is, the value field
logically “anded” with the mask field must be equal to the value field. The value and mask fields
must have equal lengths. There must be an even number of hexadecimal digits in the number.
P ACKET O FFSET
A decimal number between 1 and 100 that indicates the starting offset in a data packet where a
packet filter will begin its data comparison.
P ROTOCOL -I D
The symbolic name for the Ethernet protocol to be filtered. The protocol-Id is selected from a
displayed list of previously defined protocols. (Refer to the section titled
Protocol Definitions .)
B RIDGE F ILTERS B ACKGROUND I NFORMATION
User-defined bridge filters allow you to filter unwanted traffic out of the network. The following
table lists the four different types of bridge filters and the maximum number of filters that can be
configured for each type:
Note: If the mode of operation is changed, any previously defined filters will be deleted. Any
previously defined protocol definitions will remain unchanged.
Filter Type Maximum
Number of Each
source MAC address
filter
50
destination MAC
address filter
50
protocol filter 40
packet data filter 60
hardware filter 63
(in manual mode)