Hi, I would like to connect a Cisco router 2611 to my current 02 – ADSL2 modem, so I could have access to the internet. My current ISP is O2 Broadband. I am not really sure if I should use a cross-over cable or a straight- through cable for this connection. Also, I would like to know if I would have to configure both router and modem, so they could communicate to each other. I heard I would have to use some kind of encapsulation; is that true?
When I connect my router to the ADSL2 modem using the Ethernet port on both router and modem, either by cross-over or straight- through cable, the green led stays on, and I also can ping both router and modem successfully, but still can no have access to the internet; wonder why?
Just want to add here that I don?t have any problem to connect to the Internet using my ADSL2 modem. I would like to use my Cisco router as well for my home network; and that?s where all the trouble starts.
Please help me !
My Router 2611 has 2x Ethernet RJ45 ports, 1 x serial auxiliary RJ-45 port, 1 x console port, and 2x serial WAN interfaces.
My 02 ADSL2 modem has 4x Ethernet ports, and 1x USB port.
Thank you