Checking Interface Status

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 10-1 shows sample output from ifconfig for PPP links that are running.

Example 10-1 ifconfig Output for Point-to-Point Link

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 10-1 for both standard and dynamic point-to-point links.

Example 10-2 ifconfig Output for Multipoint Link

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.