User manual

Chapter 3 - Layer 2 Command Set - PHY and MAC Macf Command (Addresses Mapping)
Alvarion BreezeNET B130/B300 GigE 77 Operational User Manual
The second column in the above table contains automatically assigned internal
numbers, which may be used to delete any specific line from the table by a macf
del N command.
The macf clear command clears the mapping table altogether.
Quiet option allows switching off message logging to the system log.
The mapping filter may operate in two different regimes:
In the normal regime, all client units whose address pairs are not explicitly
specified in the mapping table are treated as usual, without any restrictions. This
is default regime.
In the strict regime (which is enabled by macf strict and disabled by macf
-strict), all packets received from units not described in the mapping table will be
discarded.
In both regimes, when a packet is discarded by the filter, this fact is accompanied
by a warning message on the screen and registered in syslog. To prevent an
avalanche of faulty registration packets, only the first attempt to deceive the
system from the group of similar ones is registered.
The MAC filter algorithm consists of two steps. In the normal mode (default):
1 First, the table is searched for the MAC-address of a packet being checked.
2 If the MAC-address is found, then the received IP-address is checked for
correspondence with that found in the table.
The reverse mode (enabled by reverse option, and disabled by -reverse) swaps the
above two steps:
1 First, the table is searched for the IP-address received
2 Then the MAC-address received is checked against that from the table.
In both regimes, the parameter with which the search starts is a search key and
cannot appear in the table more than once.
If the simple option is enabled, only the first step of the above algorithm is
executed. If the address searched for is found in the mapping table, then the
packed is normally handled by the device. Otherwise, the packet will be discarded,
CAUTION
If you are remotely configuring a device using telnet, make sure, when enabling the strict regime,
that your own workstation is already cited correctly in the mapping table. Otherwise you lose control
over the device, and disabling the strict regime will be only possible through the devices' diagnostics
port.