use static ip config on dhcp network?


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my isp (mediacom, http://www.mchsi.com) sucks. i've had tons of problems with them before. i used to have cable internet from at&t, but since mediacom bought part of at&t a few years ago, speeds have gone down, prices have gone up, and there's no other providers in my area. [/rant]

now, my cable modem (they've replaced it more than once, with different models) keeps getting disconnected. at seemingly random times. i've found that if i configure windows to use a static ip (i basically copied everything dhcp gave me) i could still connect sometimes, because often the modem would take forever to get dhcp when it rebooted.

well i ended up calling them today to ask why it works right only half the time, and somehow they found i was using a static ip. now i have none of their software installed, so how could they know i'm not listening to the dhcp server? anyway, i basically got told "don't use a static ip" and that was it.

now i don't know as much about ip as some of you do, but i tried several different addresses, and i found i could basically set it to anything within 12.X.x.x (i could set the x.x part, not the X part) i thought this was wierd, because if i'm correct that's a whole class B address (i think :huh: ) and i would have thought they wouldn't use a whole class B range. but maybe wrong, i don't understand ip, subnetting, etc. :/ i DO know the basics of dns and dhcp though...

ok, after that long history lesson about my ISP :laugh: :unsure: is there a problem with me using a static ip?

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If your ISP's DHCP server does not check for live addresses before handing out new ones (which is most probable) then you will cause problems for the someone else you happens to get the same address as you. They will get a duplicate IP address message and won't be able to access the Internet.

However, if you are paying for a service, it should be within your rights to get what you are paying for. Keep bugging the ISP until they fix the problem - don't take no sh*t.. ;)

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my isp (mediacom, http://www.mchsi.com) sucks. i've had tons of problems with them before. i used to have cable internet from at&t, but since mediacom bought part of at&t a few years ago, speeds have gone down, prices have gone up, and there's no other providers in my area. [/rant]

now, my cable modem (they've replaced it more than once, with different models) keeps getting disconnected. at seemingly random times. i've found that if i configure windows to use a static ip (i basically copied everything dhcp gave me) i could still connect sometimes, because often the modem would take forever to get dhcp when it rebooted.

well i ended up calling them today to ask why it works right only half the time, and somehow they found i was using a static ip. now i have none of their software installed, so how could they know i'm not listening to the dhcp server? anyway, i basically got told "don't use a static ip" and that was it.

now i don't know as much about ip as some of you do, but i tried several different addresses, and i found i could basically set it to anything within 12.X.x.x (i could set the x.x part, not the X part) i thought this was wierd, because if i'm correct that's a whole class B address (i think :huh: ) and i would have thought they wouldn't use a whole class B range. but maybe wrong, i don't understand ip, subnetting, etc. :/ i DO know the basics of dns and dhcp though...

ok, after that long history lesson about my ISP :laugh: :unsure: is there a problem with me using a static ip?

A static IP has no Lease Assigned, all they need to do is look at the log and notice that your MAC Address has no DHCP Lease assigned to and bam, they know you have a static ip.

Its that simple. :yes:

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However, if you are paying for a service, it should be within your rights to get what you are paying for. Keep bugging the ISP until they fix the problem - don't take no sh*t.. ;)

Yes you do, but to their contract or their service. The ISP does not and will not bend over backwards for you...

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It's no fun when speeds are lacking, but thats how Cable works, they don't guarantee speeds, except for a bare minimum. Anyway, It intrigues me that you have chosen to 'borrow' a static ip address from your ISP, even though you're not supposed to. However, in my experience, when i've had bad connections from an ISP, they usually don't tend to fall in my favor, and I have to switch, and then they call to ask me why I switched. Unfortunately you say there's no other providers near you, does this include DSL? DSL does guarantee speeds, and you might enjoy that better. BTW, I've been DSL since my entrance to Broadband, and i've yet to find a reason to switch to Cable, my area doesn't provide good deals in that technology. Cyberonics offers 1.5mbit/768 ADSL for $49.99 here in Chicago, not a world apart from you. You should have SBC there at least..

Good Luck to ya :yes:

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dsl is available in my area but i can't get it at my house. that's the most annoying thing i find about dsl; you have to be within a certain distance from the ISP's office to get it. :crazy: apparently i'm about half a mile or so further than dsl allows :(

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with Shaw Cable they are setup on DHCP, ad I get the same IP address all the time, If set myself up static with the same IP. I am unable to connect.

DHCP is much simpler and easier for networks.

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