Hi John, Cable companies often configure their provisioning (DHCP) severs to verify that the incoming DHCP request is from a MAC which is known.
Couple of things to try. * Power cycle the CM and then have the PIX attempt to do DHCP. Do you get a DHCP OFFER? * After you power cycle the modem, put a sniffer on the wire between the PIX and modem to make sure that the PIX is generating enet frames from only one src MAC address. Depending on your service and how the CM is configured, the CM might be configured to learn one MAC on the home-side. If the PIX is generating frames with different MAC src then the one used for DHCP, this could be your issue. * If the above doesn't help and you have a host which does get an IP address, configure the PIX (if possible) to generate MAC src frames which originate with the host's MAC. If this works, its likely because the cable company's DHCP servers will only respond to known MACs. If you're an ATTBI-(former E@H/TCI) customer, "unknown" MACs will usually get an IP address (but you'll have limited access). If you're an ATTBI-(former Roadrunner/Mediaone) customer, the provisioning system must know your MAC in order for it to respond to your DHCP. Hope this helps, John Green wrote: > > is any one aware of any issue with PIX501 and > connecting via cable modem to get an ip address (dhcp) > ? > > internet-----cable-----PIX----HOST > modem 501 > > without the pix, the HOST is able to get the dhcp ip > address fine. the pix is configured to get an > ipaddress from dhcp for its outside interface. but it > is failing. > does anyone know of such issues ? > > __________________________________________________ > Do You Yahoo!? > Yahoo! Movies - coverage of the 74th Academy Awards. > http://movies.yahoo.com/ Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=39296&t=39269 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
