My Company recently using L2TP over radio link, for testing purpose the LNS using cisco 1841 and the L2TP client using 3 different machine:
1. Hongdian Router
2. Teldat Router
3. Win XP client L2TP with IPSEC Disable
there is problem when using Hongdian and Teldat router, the LNS did not assigned address and install route,the IPCP State suddenly closed as you can see at Debug LNS IPCP Fail.txt. I can assure you both router config is working (because when using another L2TP server like sl2tps or mikrotik, it just work fine).
But When using Win L2TP client, it work as you can see at Debug LNS IPCP Success.txt
i enclosed the config LNS too
help plz anyone?