Troubleshooting PPP links

Link termination

Lines 129-159 show the link being brought down in orderly fashion after the command ppptalk detach Annex was issued.

129 Link link_0 : LCP FSM Event Administrative Close
130 Link link_0 : LCP      Causes State OPENED -> CLOSING
131 Link link_0 : LCP Send Terminate Request
132 Link link_0 : LCP Down
133 Link link_0 : CHAP Terminated
134 Link link_0 : PAP Terminated
135 Bundle Annex: IPCP FSM Event Administrative Close
136 Bundle Annex: IPCP      Causes State OPENED -> CLOSING
137 Bundle Annex: IPCP Send Terminate Request
138 Bundle Annex: IPCP Down
139 Bundle Annex: IPCP Notify kernel protocol CLOSED
140 Bundle Annex: IPCP Removing interface ppp0
141 Bundle Annex: IPCP FSM Event Down
142 Bundle Annex: IPCP      Causes State CLOSING -> INITIAL
143 Bundle Annex: Phase was NETWORK, Phase Now DEAD
144 Bundle Annex: Bundle Leaving NETWORK phase, notify kernel
145 Bundle Annex: Got Statistics update
146 Bundle Annex: AUDIT outgoing Annex. Total connection time t. Data n Kbytes
147 Link link_0 : LCP Received Terminate Ack
148 Link link_0 : LCP FSM Event Receive Terminate Ack
149 Link link_0 : LCP      Causes State CLOSING -> CLOSED
150 Link link_0 : LCP Finished
151 Link link_0 : LCP FSM Event Administrative Close
152 Link link_0 : LCP      Causes State CLOSED -> CLOSED
153 Link link_0 : Closing link to remote system.
154 Link link_0 : LCP FSM Event Administrative Close
155 Link link_0 : LCP      Causes State CLOSED -> CLOSED
156 Link link_0 : LCP FSM Event Down
157 Link link_0 : LCP      Causes State CLOSED -> INITIAL
158 Link link_0 : Phase was NETWORK, Phase Now DEAD
159 Link link_0 : LCP Finished finishing

Line 146 shows the total connection time and the number of bytes that were sent over the link.

Link is dropped unexpectedly

The following message would indicate that the link has been closed because the physical connection, such as over a telephone line, has been lost:

   Link link_0 : Physical Link has dropped, M_HANGUP

This may be caused by a fault with the physical connection itself, call waiting being enabled at either end of a telephone link which disrupts the line, or an impromptu shutdown of the remote system.

If you see a warning such as the following, the link has been dropped because the line was noisy:

   LCP WARNING Link quality poor - Link Dropped

The link will be dropped if more than a certain proportion of echo samples fail to be returned correctly. Echo sampling can be turned off by setting the echo sample period to 0 for the LCP protocol.