After PPP is started, you can use ifconfig to monitor the current state of the line, using only the PPP interface name as an argument. Example 23-4 shows sample output from ifconfig for PPP links that are running.
If a user is privileged (root), and issues an ifconfig command, machine addresses are displayed in the output as shown in the following example.
nomadb# ifconfig ipdptp0 ipdptp0: flags=28d1<UP,POINTOPOINT,RUNNING,NOARP,MULTICAST,UNNUMBERED> mtu 1500 inet 129.144.111.26 --> 129.144.116.157 netmask ffff0000 ether 0:0:0:0:0:0 |
You receive output similar to that in Example 23-5 for both standard and dynamic point-to-point links.
nubian# ifconfig ipd0 ipd0: flags=c1<UP,RUNNING,NOARP> mtu 1500 inet 129.144.201.191 netmask ffffff00 ether 0:0:0:0:0:0 |
If ifconfig does not display UP and RUNNING, you did not configure PPP correctly. For more information on ifconfig, see "ifconfig Command" and the ifconfig(1M) man page.