If the PPP log file shows that the PPP link has been established, use the ifconfig(1Mtcp) command with the -a option to check if an interface (such as ppp0) for the link exists. If the interface does exist, it should appear similar to this:
ppp0: flags=71<UP,POINTTOPOINT,WANTIOCTLS,RUNNING> inet 156.120.135.2 --> 156.120.1.57 netmask ffffffff perf. params: recv size: 4096; send size: 8192; full-size frames: 1 (alias) inet 156.120.135.2 netmask ffffffff dest 156.120.1.57Verify that the displayed flags indicated that it is marked UP and that the IP addresses for the ends of the link are what you expect. If an interface does not exist for the PPP link, the link may have been taken down because it was too noisy. Re-examine the PPP log file to discover where a problem may be occurring.