Moxa ioPAC 5542-IEC-T — настройка PPP соединения и проверка подключения [36/52]
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Moxa ioPAC 5542-IEC-T — настройка PPP соединения и проверка подключения [36/52]

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Once the PPP link is established, make it the default route; if you have a PPP link to the Internet, this is probably
what you want.
192.1.1.17
This is a degenerate case of a general option of the form x.x.x.x:y.y.y.y. Here x.x.x.x is the local IP address
and y.y.y.y is the IP address of the remote end of the PPP connection. If this option is not specified, or if just
one side is specified, then x.x.x.x defaults to the IP address associated with the local machine’s hostname
(located in /etc/hosts), and y.y.y.y is determined by the remote machine.
Example 2: Connecting to a PPP Server over a Hard-Wired Link
If a username and password are not required, use the following command (note that noipdefault is optional):
#pppd connect ‘chat –v “ “ “ “ ‘ noipdefault /dev/ttyM0 19200 crtscts “
If a username and password is required, use the following command (note that noipdefault is optional, and root
is both the username and password):
#pppd connect ‘chat –v “ “ “ “ ‘ user root password root noipdefault
/dev/ttyM0 19200 crtscts
How to Check the Connection
Once you’ve set up a PPP connection, there are some steps you can take to test the connection. First, type:
/sbin/ifconfig
(The folder ifconfig may be located elsewhere, depending on your distribution.) You should be able to see all
the network interfaces that are UP. ppp0 should be one of them, and you should recognize the first IP address
as your own, and the P-t-P address (or point-to-point address) the address of your server. Here’s what it
looks like on one machine:
lo
Link encap Local Loopback
inet addr 127.0.0.1 Bcast 127.255.255.255 Mask 255.0.0.0
UP LOOPBACK RUNNING MTU 2000 Metric 1
RX packets 0 errors 0 dropped 0 overrun 0
ppp0
Link encap Point-to-Point Protocol
inet addr 192.76.32.3 P-t-P 129.67.1.165 Mask 255.255.255.0
UP POINTOPOINT RUNNING MTU 1500 Metric 1
RX packets 33 errors 0 dropped 0 overrun 0
TX packets 42 errors 0 dropped 0 overrun 0
Now, type:
ping z.z.z.z
where z.z.z.z is the address of your name server. This should work. Here’s what the response could look like:
waddington:~$p ping 129.67.1.165
PING 129.67.1.165 (129.67.1.165): 56 data bytes
64 bytes from 129.67.1.165: icmp_seq=0 ttl=225 time=268 ms
64 bytes from 129.67.1.165: icmp_seq=1 ttl=225 time=247 ms
64 bytes from 129.67.1.165: icmp_seq=2 ttl=225 time=266 ms
^C
--- 129.67.1.165 ping statistics ---
3 packets transmitted, 3 packets received, 0% packet loss
round-trip min/avg/max = 247/260/268 ms
waddington:~$
Try typing:

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