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Hi Turn off AUTO negotiation on the interfaces and test by forcing the interfaces to an specific configuration (i.e. 100 FULL). Regards.

Since you are detecting the loop and when you change to HDLC the interface comes UP, another option is that ATT may have your circuit looped from the begining and they hadn't change it yet. Probably you need to schedule some time with ATT to have loop test all the way from your router to their...

Hi, I believe you could use NAT for your solution. However, I recommend to assign a different address scheme to each company (keep the CPU process down) or probably you may aggregate the servers in a new subnet. You mentioned a WAN link but there are only FastEthernet interfaces configure...

Hi, I'll assume that you have Layer 1&2 UP/UP. A VPN is created in two phases. It seems to be that you passed Phase I and you are trying to establish Phase II but the rules don't let them go deny the access. Check the output for Phase I & II. In a PIx firewall, this are the commands: show...

Hi, if you have HDLC UP/UP, why do you need to change to PPP? I believe when you change from HDLC to PPP, your service provider (ATT) must do that as well; otherwise, one side still HDLC and your side is PPP so encapsulation is different and the protocol goes down. What is the information from...