[HSI] Unable to add wireless router to Charter cable modem
Hello all. I would greatly appreciate your help as I am going nuts trying to add a Medialink wireless router to Charter Business cable modem.
I had the service installed this morning, and connected two computers to the ports of the SMCD3GN2 cable modem. I was told out of the 4 ports, I could only use 3. We did a ipconfig/release and renew on each computer and they were both came online.
I then connected the 3rd port to my wireless router which also has some stuff hard wired into it like IP Cameras and such, however none of that came online. It seems like the router can not get an ip from the SMC cable modem.
I broke it all down after reading a post here about unplugging everything, turning it all off, and then bringing the modem online first, wait for it to green light, then plugging the router in and after a while finally turning on the computers.
However this still has not worked, and I still can not get anything that is plugged into the router online.
Could someone please help me as it is affecting my business right now, and calling Charter support was of no help as they said they can not help me with my own router problems.
What I do know is that I am not on static ip, I am on dynamic ip. When router is not plugged into the modem both computers hard wired into the modem work fine.
I just need the things connected to the wireless router, such as wireless printer, ip cameras, computers to work also.
Thanks for any and all help. I appreciate it.
On your router, look under a setting for change MAC ADDRESS.
Change the mac on your router.
Let the cable modem sync and green lights first before you plug in the router
|reply to punter |
What do I change the mac address to. I do see that option, but which mac address do I use in there?
Update: I ended up cloning the mac address of computer #2 that was plugged into the modem directly. I unplugged it from the modem, and plugged computer #2 into one of the ports on the router and cloned the MAC address of that computer into the router settings page. I then turned everything off and brought the modem online first, then the router. One of my dropcams was then accessible as it became online from the router which was nice. I now have to get more things online tomorrow that connect to the wireless router.
However since I cloned the MAC address of computer #2, won't I have a problem when I reconnect that computer back to the actual modem as that computer needs to be hard wired into the modem rather then the router? Won't there be a mac address conflict since the SMC modem from Charter will now see 2 devices (the router and computer #2) both having the same MAC address?
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|reply to punter |
Re: [HSI] Unable to add wireless router to Charter cable modem
if the cable modem is only giving a small number of IP addresses I don't believe cloning the MAC of anything is going to get done what you want.
I think you'd need to plug in only your router to the business modem, then run everything off your side of the network. If you need more hardwire ports then expand on your side.
It looks like I am given 3 dynamic ips. 2 of which are going to be used by 2 computers that are hardwired into the SMC modem Charter provided. That leaves me with one free ip which I was hoping the router would take and then could provide internet connections to ip cameras, phones, tablets etc.
Should I be plugging in the cat cable that goes from the modem into the router in the WAN port of the router or the LAN port? When I was struggling to get it all up and working on the router I was putting it in the LAN port on the router. I am wondering if I should have been putting it in the WAN port instead?
What do you guys recommend?
This will be way over simplified , but everything on " your " network should go on the LAN (Local area network ) ports and everything external to " your " network should go on the WAN ( Wide area network ) port .
This is the only way to exceed the limit of 3 ips , since the NAT function of most routers only works with the WAN port .
If you hook the modem to the LAN ports , the router is working as a switch only .
|reply to punter |
I agree, unless you have a specific need for multiple external (ie: WAN) IP's, they are not necessary.
Your modem connects to your router WAN port and uses a single IP. I believe with Business they are assigned and not DHCP (but I could be wrong), in which case you have to configure the router for one of your assigned IP's. If business uses DHCP as well, then nothing needs to be configured, by default, it should pull all the info it needs from Charter.
You then configure your router to provide the number of IP's that you require for all of your hardware (ie: PC's, cameras, printers, etc.). This is your internal LAN.
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|reply to punter |
Well some Bus Modems have built in routers? (seems like that is what you described) This could mean you have a Double NAT network once you add your router. That means the things connected to the router would not have a IP address on the internet and would be hard to reach by the double NAT, you would need forwarded port on both devices to make it show up on the internet.
If you need two PCs and a router to use the 3 (static IP's) (that is what you should be getting from that modem) then you need to connect a switch to the modem and then the 2 PC and router to the switch, each would get an IP on the internet.
Your post lead to me downloading the manual »na.smc.com/wp-content/uploads/20···INAL.pdf for the gateway .
Makes me wonder if the OP has 3 static routeable addresses or not .
If punter is still following the thread , could you let us know what the first 3 numbers of your ips are ?
Just never considered anyone providing routeable IPs via nat .
Correct, he seemed to say they are not static IP's so that would mean NAT, but if he only gets three for some reason it would seem they are static. That means the modem/router is in bridge mode and is feeding each LAN port (3 of them) a static IP. Otherwise all 4 LAN ports should work unless not in bridge mode and only 3 address limit is set in DHCP.
We need more info from the OP to help him.