In the debugs, I see that the cellular modem (HWIC-3G-GSM) is disconnecting the ppp connection:Ce0/2/0 LCP: I DISCREQ [Open] id 26 len 8 magic 0x9A007A9AEarlier it proposed to do chap and/or pap but we refused.So I propose to give it a try with this ...

Hi Kerimebarus,From the debugs you provided, it seems to be a configuration issue.It seems you configured the cellular and/or dialer interface with ms-chap. But in fact you should configure it with pap or chap username/password:interface Cellular0/2/...

Hi Piotr,I would be interested to see following debugs throughout this complete operation:debug ppp negodebug chatdebug async statedebug dialerdebug ppp packetWhen you disconnect the antenna, I would assume ppp keepalives start failing and detect the...

As we discussed via a TAC case, this functionality (Nat of IPV6 - IPv4) is not supported yet on GGSN.

To followup on this thread (and hopefully close it by providing the final solution :-))Topology:-----------RFC 1483 bridging implemenation over DSL with IPV6 addressing. -CPE (887) is doing IRB (integrated routing and bridging). Its the DHCPv6 client...