DHCP Server
- Thread starter dkryan
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your router would issue the DHCP addresses for your network. you cable modem also issues DHCP addresses, however it would normally issue them just to the internet side of the router and it would know nothing about the network side -- routers have 2 sides, internet and network. network is local, internet is.. well.... the internet.
Are you having a specific issue?
Are you having a specific issue?
Yep, Tinman (STNG?), I most certainly am.
I somehow fixed my start-up problem, but I now have zero Internet connection.
The IntelProSet diagnostic reflected a pass on all tests except the "ping" test, stating that the default gateway was fine but the DHCP server was not responding.
I previously (after the problem became apparent) powered down the cable modem, the e2000, and the laptop. I then powered them up in the same order.
No joy.
I'd like to give updated drivers for the Linksys a shot, but with no connection, that download won't be occurring anytime too soon.
I somehow fixed my start-up problem, but I now have zero Internet connection.
The IntelProSet diagnostic reflected a pass on all tests except the "ping" test, stating that the default gateway was fine but the DHCP server was not responding.
I previously (after the problem became apparent) powered down the cable modem, the e2000, and the laptop. I then powered them up in the same order.
No joy.
I'd like to give updated drivers for the Linksys a shot, but with no connection, that download won't be occurring anytime too soon.
Are you able to see if you are getting a valid ip ?
I would, bypass the router and get connected wired to modem directly first. From computer to modem wired hard reset ur modem than restart your computer. Check to see what ip you pull.
Make sure your e2000 is not connected to you router with the yellow "internet" port.
Just plug the cable in one of the other ports and use it as a wireless switch, you can turn DHCP off on the e2000.
Just a guess, i don't have a clue.
Just plug the cable in one of the other ports and use it as a wireless switch, you can turn DHCP off on the e2000.
Just a guess, i don't have a clue.
You modem is a client of DHCP server (that provider set for you) or it is set with static IP.
It usually connected to you router or access point via blue or yellow cable to blue or yellow port which says WAN on it.
Try to connect your laptop directly to your Modem, if you can get to internet than you have a problem with your router. If you can't with that strait connection, call your providers help desk.
If you can get to internet. Get you CD that came with router, connect your laptop to that WAN port, and run "installation wizard". If you don't have CD, I can, or couple others guys here guide you through manual set up.
It usually connected to you router or access point via blue or yellow cable to blue or yellow port which says WAN on it.
Try to connect your laptop directly to your Modem, if you can get to internet than you have a problem with your router. If you can't with that strait connection, call your providers help desk.
If you can get to internet. Get you CD that came with router, connect your laptop to that WAN port, and run "installation wizard". If you don't have CD, I can, or couple others guys here guide you through manual set up.
If you have two DHCP servers running (accidentally) they'll fight and you'll lose. This happens when one adds a 2nd router without putting it in "dumb switch" mode. As said above sometimes cable modems have router capability.
In the event that your DNS is funky, try making the computer use openDNS's 208.67.222.222
Open a CMD box and type
ipconfig -all
if you get something starting with 192.168 you have a "local" IP and your local DHCP server is working. If you get "anything else" and are connected to the net, go to www.whatsmyip.org and see if it matches.
In the event that your DNS is funky, try making the computer use openDNS's 208.67.222.222
Open a CMD box and type
ipconfig -all
if you get something starting with 192.168 you have a "local" IP and your local DHCP server is working. If you get "anything else" and are connected to the net, go to www.whatsmyip.org and see if it matches.
Originally Posted By: Trav
Make sure your e2000 is not connected to you router
???
E2000 is the router.
Make sure your e2000 is not connected to you router
???
E2000 is the router.
This is how it works.
The Cable Modem is a DHCP server that hands out a single IP address. So if you directly connect your laptop it hands it a IP address. If your e2000 it gets that IP address.
Your router(e2000) also has a DHCP server if enabled. Its job is to take an internet connection this case from cable modem and then in turn split up the connection into multiple ones). So your e2000 is then the DHCP server if turned on.
The best route for trouble shooting is turn of notebook and cable modem and plug the laptop directly into the ethernet cable that typically runs to your e2000. If that does not work then the issue lies in your computer. If it does work then your router.
Do a start>run and then type the following in bold:
C:\Users\ComputerName>ipconfig /all
In that whole slew of stuff you should see a connection hopefully.
The Cable Modem is a DHCP server that hands out a single IP address. So if you directly connect your laptop it hands it a IP address. If your e2000 it gets that IP address.
Your router(e2000) also has a DHCP server if enabled. Its job is to take an internet connection this case from cable modem and then in turn split up the connection into multiple ones). So your e2000 is then the DHCP server if turned on.
The best route for trouble shooting is turn of notebook and cable modem and plug the laptop directly into the ethernet cable that typically runs to your e2000. If that does not work then the issue lies in your computer. If it does work then your router.
Do a start>run and then type the following in bold:
C:\Users\ComputerName>ipconfig /all
In that whole slew of stuff you should see a connection hopefully.
The cable modem does not have a dhcp. Server, rather, the address that your computer or the router connectte to it gets is assigned by the cable company's dhcp server.
Originally Posted By: Quattro Pete
Originally Posted By: Trav
Make sure your e2000 is not connected to you router
???
E2000 is the router.
I know its a router but does he need to be using it as one if he has an ISP provided Modem/Router? Maybe i should have said connected to your cable modem ok which comcast and Fios also call a router ok.
Originally Posted By: Trav
Make sure your e2000 is not connected to you router
???
E2000 is the router.
I know its a router but does he need to be using it as one if he has an ISP provided Modem/Router? Maybe i should have said connected to your cable modem ok which comcast and Fios also call a router ok.
A lot of confusing comments in this thread. First of all a modem is a media converter; it has nothing to do with handing out IP addresses; it operates at a signal level converting digital data into a signal that can be transmitted over the media you wish to send it. That is why there are "cable modems" and DSL modems and they not interchangable.
When one talks on the phone, your voice is being carried over copper, fiber, perhaps satellite etc, you don't know what media, nor do you care, or have to worry about how it is converted from one media to another. Same concept.
If you direct attach your PC to the modem, you need DHCP turned on (under windows aka "Obtain an address automatically") The PC is then a DHCP client to the ISP DHCP server (NOT the modem) If you throw in a Linksys, IT becomes the DHCP client to the ISP, obtaining an Internet valid address to "get on" the internet. Separately and distinct, the Linksys can also be a DHCP server for clients on the internal (home) network. If the internal DHCP server is not used, each device on the interal network has to have an address et al statically assigned (gw, netmask)
edit:I see miller cleared that up while I was typing.
When one talks on the phone, your voice is being carried over copper, fiber, perhaps satellite etc, you don't know what media, nor do you care, or have to worry about how it is converted from one media to another. Same concept.
If you direct attach your PC to the modem, you need DHCP turned on (under windows aka "Obtain an address automatically") The PC is then a DHCP client to the ISP DHCP server (NOT the modem) If you throw in a Linksys, IT becomes the DHCP client to the ISP, obtaining an Internet valid address to "get on" the internet. Separately and distinct, the Linksys can also be a DHCP server for clients on the internal (home) network. If the internal DHCP server is not used, each device on the interal network has to have an address et al statically assigned (gw, netmask)
edit:I see miller cleared that up while I was typing.
Last edited:
One thing to make sure of, the modem provided by the cable company is, in fact, just a modem and not a modem/router. If it is a modem/router, then the setup is a bit different.
^^^what Miller88 and simple_gifts said^^^
I work for Comcast, and that is the way our system works.
I work for Comcast, and that is the way our system works.
Thanks for all of the replies. Clearly, some of you have forgotten more about computers than I will ever know!
A real long (and annoying) story short: it's the wonderful Time Warner Cable system. It's not the router or the cable modem. I called TWC after making a direct connection to my laptop and found I still had no connectivity.
The tech said their Internet setup is currently "at 98% but it should be at 100%," hence the orange light next to "link" on the Motorola cable modem. He did say it was certain to be fixed by early tomorrow morning. I asked him how he knew that and he said, "we'll keep putting more techs on the problem as today progresses because we have lots of business customers and they'll be mad Monday morning if they have no connectivity."
Lovely.
I did learn to interpret whatever northern India dialect he was speaking in, so I've got that going for me.
I spent alot of time Saturday trying to self-diagnose the problem before posting. The next time I'll pay attention to the color of the modem lights after I've shut down and re-powered the modem.
Thanks, again.
A real long (and annoying) story short: it's the wonderful Time Warner Cable system. It's not the router or the cable modem. I called TWC after making a direct connection to my laptop and found I still had no connectivity.
The tech said their Internet setup is currently "at 98% but it should be at 100%," hence the orange light next to "link" on the Motorola cable modem. He did say it was certain to be fixed by early tomorrow morning. I asked him how he knew that and he said, "we'll keep putting more techs on the problem as today progresses because we have lots of business customers and they'll be mad Monday morning if they have no connectivity."
Lovely.
I did learn to interpret whatever northern India dialect he was speaking in, so I've got that going for me.
I spent alot of time Saturday trying to self-diagnose the problem before posting. The next time I'll pay attention to the color of the modem lights after I've shut down and re-powered the modem.
Thanks, again.
Quote:
He did say it was certain to be fixed by early tomorrow morning.
Right....
Apparently you are new at dealing with ISPs. lol
A big, and I mean big, bonus for you is that the ISP actually believes "It is not you"
He did say it was certain to be fixed by early tomorrow morning.
Right....
Apparently you are new at dealing with ISPs. lol
A big, and I mean big, bonus for you is that the ISP actually believes "It is not you"
Originally Posted By: simple_gifts
Apparently you are new at dealing with ISPs.
Oh, no newbie here with ISPs. Whether it was Cincinnati Bell or Time Warner, when things worked well, they worked real well. And when things went south, it's always been "sorry about your luck. By the way, what else can we sell you today?"
Maybe TWC ought to post here for a solution to their problem.
Apparently you are new at dealing with ISPs.
Oh, no newbie here with ISPs. Whether it was Cincinnati Bell or Time Warner, when things worked well, they worked real well. And when things went south, it's always been "sorry about your luck. By the way, what else can we sell you today?"
Maybe TWC ought to post here for a solution to their problem.
Oh, how do I know this
Years ago, Netscape era. When you had to demonstrate you were in the US to download Netscape with 128bits of encryption (or something like that) and the ISP didn't have proper PTR records in DNS as Netscape couldn't validate that the IP address given by the ISP was in the US.
So I make the dreaded call and the guy on the phone is reading the script, "Go to the 'My Computer' button...."
Finally, after explaining that I teach networking and it appears that their DNS server is not properly handling reverse lookups... I get passed to someone with a much higher technical level.
Of course my response back to his go to "My Computer" is no you go to YOUR computer as the problem is at your end.
I understand that most customers don't have the level of technical knowledge that some of us do. But if we the customer demonstrates a certain level of technical expertise, don't treat us like we have no clue about what we are doing.
I deal with customers everyday and have to adjust my communication based on the perceived skill level of the customer. Some want me to do it, some want me to send them a step by step guide and some want the 1:10000ft view of the solution so they can execute.
Originally Posted By: simple_gifts
Quote:
He did say it was certain to be fixed by early tomorrow morning.
Right....
Apparently you are new at dealing with ISPs. lol
A big, and I mean big, bonus for you is that the ISP actually believes "It is not you"
Years ago, Netscape era. When you had to demonstrate you were in the US to download Netscape with 128bits of encryption (or something like that) and the ISP didn't have proper PTR records in DNS as Netscape couldn't validate that the IP address given by the ISP was in the US.
So I make the dreaded call and the guy on the phone is reading the script, "Go to the 'My Computer' button...."
Finally, after explaining that I teach networking and it appears that their DNS server is not properly handling reverse lookups... I get passed to someone with a much higher technical level.
Of course my response back to his go to "My Computer" is no you go to YOUR computer as the problem is at your end.
I understand that most customers don't have the level of technical knowledge that some of us do. But if we the customer demonstrates a certain level of technical expertise, don't treat us like we have no clue about what we are doing.
I deal with customers everyday and have to adjust my communication based on the perceived skill level of the customer. Some want me to do it, some want me to send them a step by step guide and some want the 1:10000ft view of the solution so they can execute.
Originally Posted By: simple_gifts
Quote:
He did say it was certain to be fixed by early tomorrow morning.
Right....
Apparently you are new at dealing with ISPs. lol
A big, and I mean big, bonus for you is that the ISP actually believes "It is not you"
Most cable modems have a MAC lock on them. MAC being Media Access Control; the ethernet hardware address of the device.
So, lets say that the WAN interface on your Linksys router is A1:B2:C1
1:E1:F1 and the network card on your laptop is 31:B2:C21:E2:F1 - the laptop will NOT connect.
You will have to power down the cable modem for 20 - 30 seconds in order for it to reset.
So, lets say that the WAN interface on your Linksys router is A1:B2:C1
1:E1:F1 and the network card on your laptop is 31:B2:C21:E2:F1 - the laptop will NOT connect.You will have to power down the cable modem for 20 - 30 seconds in order for it to reset.
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