How to avoid to be disconnected as Lost-Carrier?

Gary Gatten Ggatten at
Mon Nov 22 15:42:53 CET 2010

If I understand correctly, unless the users are idle when the carrier is dropped, they'll know regardless of how you try to mask it. No carrier = no connection, no "wire". If the loss is very brief and modem reconnect quickly, maybe you can mask it, but, you must do so on your ppp server.

From: at < at>
To: freeradius-users at <freeradius-users at>
Sent: Mon Nov 22 07:55:58 2010
Subject: How to avoid to be disconnected as Lost-Carrier?


I have 200 users in a small area network (PPPoE, LAN network). I use Mikrotik RouterOS as PPPoE server & use Freeradius as Radius server. I find that some “Lost-Carrier” issue due to lost connection (around 8%-10% users). I judged that cable had been interfered intermittently. But I would like to keep connection instead of disconnection when the issue happened. What do I set Freeradius that increase intervals or times of checking communication? Because it were, users will avoid to disconnect and not be ware of cable interfering when it happen really.


Robin Lu

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