CMG-DCM / AM - Güralp Systems Limited

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CMG-DCM Data Communications Module change the password as soon as you can with the command passwd 3. Connect the DCM's NETWORK port to your network, and power cycle it. Log in again. 4. If your network does not use DHCP, type gcfgdbset net.eth.0 static to make the DCM use a static IP address instead, and set the address with gcfgdbset net.eth.0.netmask 255.255.255.0 gcfgdbset net.eth.0.address your-address Here, your-address should be replaced with the IP address you want the DCM to use. The IP address you choose must be unique on your network. If you are connecting the DCM to a machine on the same network, you do not need to configure any more options at this stage. If your network uses DHCP, you will not need to perform this step. Instead, ensure the DCM is also using DHCP with gcfgdbset net.eth.0 dhcp/bootp 5. Issue the command ifconfig The DCM will reply with technical information on its current network setup. Each interface is listed separately. The NETWORK port uses the interface eth0: eth0 Link encap:Ethernet HWaddr 08:00:20:C0:FF:E2 inet addr:192.168.48.187 Bcast:192.168.48.255 Mask:255.255.255.0 UP BROADCAST NOTRAILERS RUNNING MULTICAST MTU:1500 Metric:1 RX packets:88045 errors:36 dropped:0 overruns:36 frame:0 TX packets:16308 errors:0 dropped:0 overruns:0 carrier:0 collisions:149 txqueuelen:100 RX bytes:12358214 (11.7 MiB) TX bytes:0 (0.0 B) Interrupt:76 If the interface is correctly set up, its IP address will be shown after inet addr: (here, 192.168.48.187.) 16 Issue F
Operator's guide 6. If you are connecting the DCM to a single computer which does not run a DHCP server, you will need to configure that computer to use an IP address on the same subnet as the DCM before they will be able to reach each other (see “Connecting over Ethernet“ on page 13.) You should now be able to connect to the DCM's Web setup interface by typing its IP address into any browser, e.g. https://192.168.0.2/ Scream! and similar software applications should also be configured to use this address to communicate with the module, if they are intended to communicate over the network. Alternatively, you can continue using the gcfgdbset command to set other configuration options by name. In Chapter 6, each option's name is given in italics. The command syntax to use is gcfgdbset option-name new-value The options will take effect immediately whenever possible. Some changes may take some time to complete, since services may need to be restarted. The gcfgdbset command performs only simple checks on the new value, so you should check the syntax of the option carefully. Wi-Fi Optionally, a DCM may be supplied with 802.11 (“Wi-Fi”) hardware in place of Ethernet. There are two modes in which an 802.11 network may operate: • In ad hoc mode, data packets are sent out over the wireless connection indiscriminately and are received by all machines on the network. This is the simplest style of Wi-Fi network, but consumes more power and cannot easily be extended to large networks. • In infrastructure mode, dedicated 802.11 hubs collect data packets, collate, and distribute them efficiently around the network. These hubs may also act as transparent extensions to existing (wired) TCP/IP networks. The DCM is capable of running in either situation, depending on your requirements. As far as the computers on the network are concerned, there is no difference between a TCP/IP network running over Ethernet December 2006 17
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