Become superuser on the local machine and call the peer.
Call the remote peer with debugging turned on.
% pppd debug call peer-name |
You might need to obtain debugging information from the peer in order to fix certain communications problems.
Check the resulting logs for the communications problems in the next table.
Table 35–3 General Communications Problems That Affect PPP
Symptom |
Problem |
Solution |
---|---|---|
too many Configure-Requests |
One peer cannot hear the other peer. |
Check for the following problems:
|
The pppd debug output shows that LCP comes up, but higher-level protocols fail or show CRC errors. |
The asynchronous control character map (ACCM) is incorrectly set. |
Use the default-async option to set the ACCM to the standard default of FFFFFFFF. First try using default-async as an option to pppd on the command line. If the problem clears, then add default-async to /etc/ppp/options or to /etc/ppp/peers/peer-name after the call option. |
The pppd debug output shows that IPCP comes up but terminates immediately. |
IP addresses might be incorrectly configured. |
|
The link exhibits very poor performance. |
The modem might be incorrectly configured, with flow control configuration errors, modem setup errors, and incorrectly configured DTE rates. |
Check the modem configuration and adjust accordingly. |