RadioLAN Campus BridgeLINK User Manual

Page 69

890-007 Rev. A 01/28/99

Page 59

Mask Bytes

As an alternative to placing wildcards (

00) in the MAC Address

field, the

Mask Bytes column allows you to select which octets

in the

MAC Address field will be read by the CPU (see

Figure 37).

Entering

ff into a mask bytes octet instructs the CPU to allow

only MAC octets with a value matching the same location in
the

MAC Address field to pass. The CPU rejects any other

entry in the octet position.

Entering a

00 into a mask bytes octet instructs the CPU to

“mask” the octet. When the octet is masked, the CPU allows
any entry to pass.

Entering an

ff into a mask bytes octet, and a 00 in the same octet position of the MAC Address instructs the CPU

to allow an entry matching only

00 to pass.

Source/Dest.

The

Source/Dest. column allows you to specify whether the action upon packets will occur if that node is sending or

receiving packets.

MAC Address: 00 A0 D4 00 00 00

ff ff ff 00 00 00

Mask Bytes:

1 2 3 4 5 6

Byte Position:

ff = the byte in this position must match
00 = allow any digit in this section

Assigned to a

Manufacturer

Assigned by a

Manufacturer

Figure 37: Working with Mask Bytes