Murata Electronics North America SEM2410 ユーザーズマニュアル
2000, 2001 Cirronet
Incorporated
4 022101
The network that the SEM is connecting to must be compatible with 10BaseT products.
The SEM will not work if the network only supports 100BaseT or half duplex 10BaseT
products. Before connecting a default configured SEM to an active network that does not
have a BOOTP or DHCP server, ask the network system for an IP address for the SEM
that will not cause any problems on the network.
The SEM can be configured two ways. The first is through the serial port. The settings
for the serial port are 38400 baud, 8 data bits, 1 stop bit, and no parity. SEMcom will
automatically find the appropriate serial port and configure the serial port settings for
you. The software will inform you of its progress and any problems that arise. After a
few seconds the SEM firmware version is displayed followed by the
The SEM will not work if the network only supports 100BaseT or half duplex 10BaseT
products. Before connecting a default configured SEM to an active network that does not
have a BOOTP or DHCP server, ask the network system for an IP address for the SEM
that will not cause any problems on the network.
The SEM can be configured two ways. The first is through the serial port. The settings
for the serial port are 38400 baud, 8 data bits, 1 stop bit, and no parity. SEMcom will
automatically find the appropriate serial port and configure the serial port settings for
you. The software will inform you of its progress and any problems that arise. After a
few seconds the SEM firmware version is displayed followed by the
SEM>
prompt.
To set the IP number of the SEM, use the ip command.
ip <xxx.xxx.xxx.xxx> {yyy.yyy.yyy.yyy}
Where x is the new IP address, and y is the optional netmask number.
Once a valid IP address has been entered in the SEM, a second method to configure the
SEM is through a telnet session. Most telnet programs work with the SEM. Windows
95/98/NT/2000/ME have a telnet program that works with the SEM. A telnet session can
be started by clicking on Start->Run if you have Windows 95/98/NT/2000 and the
TCP/IP client has been installed. For a SEM with an IP address of 192.168.0.254, enter
the following information in the dialog box:
Once a valid IP address has been entered in the SEM, a second method to configure the
SEM is through a telnet session. Most telnet programs work with the SEM. Windows
95/98/NT/2000/ME have a telnet program that works with the SEM. A telnet session can
be started by clicking on Start->Run if you have Windows 95/98/NT/2000 and the
TCP/IP client has been installed. For a SEM with an IP address of 192.168.0.254, enter
the following information in the dialog box:
telnet 192.168.0.254
A telnet window will open up. The first line is the version of the SEM firmware followed
by the prompt:
by the prompt:
SEM>
If the SEM is to transmit data to devices not on its subnet, a default router must be
specified. To enter the default routing address use the route command.
route add default <xxx.xxx.xxx.xxx> {yyy.yyy.yyy.yyy}
Where x is the IP address of the gateway device and y is the optional netmask number.
To configure a SEM as a master device, use the bridge command:
bridge master<CR>
The SEM2410 includes provision for filtering of multicast and broadcast packets. In
many networks, there is sufficient multicast and/or broadcast packets to slow the overall
performance of the SEM. By turning filtering on, the SEM will ignore these packets and
limit transmission to packets with specific device addresses. In some instances, it will be
desired to have the SEM transmit the multicast and broadcast packets; in this instance
filtering should be disabled. Note that filtering broadcast packets also filters multicast
packets but filtering multicast packets does not filter broadcast packets. To filter
broadcast and multicast packets use the bridge filter command:
performance of the SEM. By turning filtering on, the SEM will ignore these packets and
limit transmission to packets with specific device addresses. In some instances, it will be
desired to have the SEM transmit the multicast and broadcast packets; in this instance
filtering should be disabled. Note that filtering broadcast packets also filters multicast
packets but filtering multicast packets does not filter broadcast packets. To filter
broadcast and multicast packets use the bridge filter command:
bridge filter bcast<CR>
Refer to the section SEM/Radio Commands for details of the filter commands.