Cable Modem DHCP problem [7:47175]
Does anyone know how to release a DHCP lease on a 2514 eth interface? I would like to release the lease recieved from the cable modem (comcast) . I have tried powercycling the modem, router, reload, shuting the interface ect and nothing works. I get the same lease all the time and cant get out to the internet. thanks Randy Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=47175&t=47175 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: Cable Modem DHCP problem [7:47175]
Randy- The assumption is that you had a PC hooked up to the cablemodem prior to the current expectation to use the router as the Ethernet host behind the cablemodem. Whether or not this is true or not doesn't really matter, but... ... in all of my experiences over the last 6 months, pretty much every cablemodem provider has their equipment set up in such a way that the first one or two MAC addresses that are connected to the cablemodem for Internet access are recorded in some MAC Database and paired with the "extended" DHCP lease you get. The only real way to clear these MAC entries from the DB is to call tech-support and tell them you are replacing the network card in your computer, and need to have the MAC table for your modem reset. It's is advisable to NOT tell them you are hooking up a router to it, as they will immediately "go stupid" and tell you they don't support such a scenario - like as if a router's Ethernet interface is any different than any other Ethernet interface! Once they have the MAC table reset, they most probably will remotely reset the cablemodem, or have you power cycle it. This will allow for the learning of the new MAC address to associate with your DHCP lease. This is most probably why you can't get on the net at the current time with your DHCP lease. Let us know if this fixes your problem! Good Luck! Mark -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of McHugh Randy Sent: Friday, June 21, 2002 10:56 PM To: [EMAIL PROTECTED] Subject: Cable Modem DHCP problem [7:47175] Does anyone know how to release a DHCP lease on a 2514 eth interface? I would like to release the lease recieved from the cable modem (comcast) . I have tried powercycling the modem, router, reload, shuting the interface ect and nothing works. I get the same lease all the time and cant get out to the internet. thanks Randy Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=47182&t=47175 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Cable Modem DHCP problem [7:47175]
I usally just change my mac-address and it will get a new ip and then you can change it back after that. Rick ""McHugh Randy"" wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > Does anyone know how to release a DHCP lease on a 2514 eth interface? I > would like to release the lease recieved from the cable modem (comcast) . I > have tried powercycling the modem, router, reload, shuting the interface ect > and nothing works. I get the same lease all the time and cant get out to the > internet. > thanks > Randy Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=47201&t=47175 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Cable Modem DHCP problem [7:47175]
config t int e0 (whichever is connected to cable modem) mac-address .. > I usally just change my mac-address and it will get a new ip > and then you > can change it back > after that. > Rick > > > ""McHugh Randy"" wrote in message > [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > > Does anyone know how to release a DHCP lease on a 2514 eth > interface? I > > would like to release the lease recieved from the cable modem > (comcast) . > I > > have tried powercycling the modem, router, reload, shuting > the interface > ect > > and nothing works. I get the same lease all the time and cant > get out to > the > > internet. > > thanks > > Randy > > Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=47206&t=47175 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: Cable Modem DHCP problem [7:47175]
When dealing with this type of circuit, think of your cable modem as the UNI interface. The router can/will negotiate DHCP signals dynamically (i.e. Lease, Renewal, Rebind), but this is in terms of a host. The information your 2514 is seeing, is the same info the cable modem would provide your directly connected Microsoft PC. This is what the DHCP command is allowing you to accomplish here, to gather predetermined DHCP information from the cable modem and not full negotiations with the DHCP server. In short- reboot the cable modem, then the router... and don't be surprised if your regain the same IP address, even though you're granted a brand new lease. All the best !!! Phil -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of McHugh Randy Sent: Friday, June 21, 2002 11:56 PM To: [EMAIL PROTECTED] Subject: Cable Modem DHCP problem [7:47175] Does anyone know how to release a DHCP lease on a 2514 eth interface? I would like to release the lease recieved from the cable modem (comcast) . I have tried powercycling the modem, router, reload, shuting the interface ect and nothing works. I get the same lease all the time and cant get out to the internet. thanks Randy Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=47215&t=47175 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Cable Modem DHCP problem [7:47175]
I have roadrunner cable modem service and a 2514 as my internet connection. When I need to get another IP address I simply shut the interface down, wait a few seconds and do the no shut. To verify that you have a new IP address do the "show dhcp server" command, it show your IP address, the IP address of the DHCP server and the lease time. - Original Message - From: "Phil Lorenz" To: Sent: Saturday, June 22, 2002 7:56 PM Subject: RE: Cable Modem DHCP problem [7:47175] > When dealing with this type of circuit, think of your cable modem as the > UNI interface. > > The router can/will negotiate DHCP signals dynamically (i.e. Lease, > Renewal, Rebind), but this is in terms of a host. > > The information your 2514 is seeing, is the same info the cable modem > would provide your directly connected Microsoft PC. This is what the > DHCP command is allowing you to accomplish here, to gather predetermined > DHCP information from the cable modem and not full negotiations with the > DHCP server. > > In short- reboot the cable modem, then the router... and don't be > surprised if your regain the same IP address, even though you're granted > a brand new lease. > > All the best !!! > Phil > > -Original Message- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of > McHugh Randy > Sent: Friday, June 21, 2002 11:56 PM > To: [EMAIL PROTECTED] > Subject: Cable Modem DHCP problem [7:47175] > > Does anyone know how to release a DHCP lease on a 2514 eth interface? I > would like to release the lease recieved from the cable modem (comcast) > . I > have tried powercycling the modem, router, reload, shuting the interface > ect > and nothing works. I get the same lease all the time and cant get out to > the > internet. > thanks > Randy Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=48029&t=47175 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
