EXP Computer PathBuilder S200 User Manual

Page 63

Bridging

T0008-16F

Release 5.2M

Bridge Filtering

MAC Address
Filtering Action
Parameter
Selections

This table lists the filtering actions available for the MAC Address Filtering Action
parameter.

What Happens
During Filtering

When filtering is performed, the system checks the Bridge Link Table of the bridge
link involved with the frame to see if the MAC Address Filtering Action parameter is
configured to disable all filtering on that bridge link. Figure 30 shows the process
involved in MAC Address filtering.

If the parameter is configured to disable filtering (NONE selected), then the frame is
allowed to pass and no filtering is applied.

If the parameter is configured with another value, either PASS or BLOCK, this
signifies that the MAC Address Filter Table is to be checked to determine whether
filtering action is to be performed. In this situation, the frame is checked to see if a
match occurs between the MAC address in the frame and an address contained in an
entry in the MAC Address Filter Table.

Outgoing
Destination Address
Link Action

Perform filtering action on an outbound frame for the
indicated MAC Destination address.

List of Links

Specifies the links associated with the preceding link action
parameters in this table. When Passlist (PL) is specified, the
associated listed links pass the frame and the unlisted links
block it. Conversely, when Blocklist (BL) is specified, the
associated listed links block the frame and the unlisted links
pass it.

Parameter

Action (continued)

Parameter

Value

Action

Pass (P)

Look in the MAC Address Filter Table for an entry with a matching
MAC frame address and perform the filtering action specified by
this entry. If no matching MAC frame address is found, pass the
frame.

Block (B)

None (N)

No filtering to be performed; pass the frame.