"It Depends"!! Historically, If the PC's DHCP-assigned address has never really changed that often, then you should be fine. If it has changed on a rather frequent basis, then it'll probably stop having outside communication after a small period of time.
Just as a side note, in some parts of the US, specifically the D/FW area of Texas, the Cable-modem providers have not configured their networks in a way that the PIX 501 doesn't get a DHCP address. One of my colleagues is running this with his provider. He has a PIX 501 set up on Cable-modem, and just has to bounce his PIX every once in a while because the DHCP lease doesn't renew in a standard automated fasion. But as long as he reboots the PIX, it gets a new address, and keeps on transcieving.... I'll have to check to see who his provider is though to give you an idea of who does this functionality. -Mark -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Audy Bautista Sent: Saturday, March 23, 2002 10:36 PM To: [EMAIL PROTECTED] Subject: Re: issue with PIX and dhcp ? [7:39269] I'm having the same problem with a PIX 501 and cable modem. I'm probably just going to take the IP received from the PC by the ISP and just put it statically on the outside interface on the PIX. Does anyone foresee any issues with this setup? ""bergenpeak"" wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > 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=39345&t=39269 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
