3Com 3CBLSG48 User Manual page 73

 C 4: M D S
HAPTER ANAGING EVICE ECURITY
Source Address — Matches the source MAC address to which
packets are addressed to the ACE.
Source Mask — Indicates the source MAC Address wildcard
mask.Wildcards are used to mask all or part of a source MAC
address. Wildcard masks specify which bits are used and which are
ignored. A wildcard mask of FF:FF:FF:FF:FF:FF indicates that no bit
is important. A wildcard of 00.00.00.00.00.00.00 indicates that all
bits are important.
For example, if the source MAC address is 00:AB:22:11:33:00 and
the wildcard mask is 00:00:00:00:00:FF, the first five bytes of the
MAC are used, while the last byte is ignored. For the source MAC
address 00:AB:22:11:33:00, this wildcard mask matches all MAC
addresses in the range 00:AB:22:11:33:00 to 00:AB:22:11:33:FF.
Destination Address — Matches the destination MAC address to
which packets are addressed to the ACE.
Destination Mask — Indicates the destination MAC Address
wildcard mask. Wildcards are used to mask all or part of a
destination MAC address. Wildcard masks specify which bits
are used and which are ignored. A wildcard mask of FF:FF:
FF:FF:FF:FF indicates that no bit is important. A wildcard mask of
00.00.00.00.00.00 indicates that all bits are important.
For example, if the destination MAC address is 00:AB:22:11:33:00
and the wildcard mask is 00:00:00:00:00:FF, the first five bytes of
the MAC are used, while the last byte is ignored. For the
destination MAC address 00:AB:22:11:33:00, this wildcard mask
matches all MAC addresses in the range 00:AB:22:11:33:00 to first
five bytes of the MAC are used, while the last byte is ignored. For
the destination MAC address 00:AB:22:11:33:00, this wildcard
mask matches all MAC addresses in the range 00:AB:22:11:33:00
to 00:AB:22:11:33:FF.