Go Premium for a chance to win a PS4. Enter to Win

x
?
Solved

Linksys router will not pull IP from Comcast modem

Posted on 2008-10-21
11
Medium Priority
?
816 Views
Last Modified: 2012-05-05
I have a Comcast dynamic IP account for my Internet access, it is attached to a Linksys WRT54G2 wireless router.  It has been working fine for 3 months and then all of a sudden we couldn't get on the internet any longer.  The PC's can get an internal IP from the Linksys, but the Linksys will not pull the public IP from the router.  Here are the facts so far:

-I can hook a laptop directly to the cable modem and it gets an IP and can get out
-Once in 5 tries, the router will get an address from the modem, but it is completely different than the one the laptop gets (it is still a valid, public address) and it cannot get outwith that address
- I have reset both multiple times

Has anyone seen this?

Thanks.
0
Comment
Question by:tmckinney01
  • 6
  • 5
11 Comments
 
LVL 23

Expert Comment

by:that1guy15
ID: 22769841
Try a new cable between your router and Modem.

Also have you tried to restart the modem?
0
 

Author Comment

by:tmckinney01
ID: 22769881
Additional info:

-I did try a different, known good cable from cable modem; and, it does work with the laptop
-As stated in the original question, I have restarted both devices multiple times.
0
 
LVL 23

Expert Comment

by:that1guy15
ID: 22769910
Sorry i must have missed the restart comment.

"I did try a different, known good cable from cable modem; and, it does work with the laptop"

but it still dosent work between the router and modem?

how long did you leave the modem shutdown before turning it back on. I have seen modems need at least 45 sec before restart to reset the mac its looking for.
0
VIDEO: THE CONCERTO CLOUD FOR HEALTHCARE

Modern healthcare requires a modern cloud. View this brief video to understand how the Concerto Cloud for Healthcare can help your organization.

 

Author Comment

by:tmckinney01
ID: 22769934
No, the new cable does not make a difference with the router.  I can't say for sure, but I would guess a couple of the times th emodem was off for over a minute.
0
 
LVL 23

Expert Comment

by:that1guy15
ID: 22769965
Try this:

Shutdown both modem and router for about 1.5 minutes. First power on the modem and let run for about 45 seconds. Then power on the router.

I have also seen in the past the order the devices come online will matter.
0
 

Accepted Solution

by:
tmckinney01 earned 0 total points
ID: 22776523
I tried shutting both down for 20 minutes, resatrting the router and letting it sit for 20 minuttes and thenrestarting the router.  It still did not work, so as a next step, I reset the router to by pushing the reset button on the back.  As soon as it came up everything worked fine.  Now I just have to redo all the settings and filters and I will be back to where I was before all of this.
0
 
LVL 23

Expert Comment

by:that1guy15
ID: 22776853
Im glade you got your issue resolve do you mind posting what you did to resolve the issue for further reference?
0
 

Author Comment

by:tmckinney01
ID: 22776883
Sure, but I don't know how to do that.
0
 
LVL 23

Expert Comment

by:that1guy15
ID: 22776940
?????

just explain the steps you did or what solved the issue.
0
 

Author Comment

by:tmckinney01
ID: 22777079
Oh, sorry, I thought it had to be posted somewhere.

If you read the post again you will see that I did describe exactly what I did to solve it.
0
 
LVL 23

Expert Comment

by:that1guy15
ID: 22777109
Sorry i did not see your final post.
0

Featured Post

How to Use the Help Bell

Need to boost the visibility of your question for solutions? Use the Experts Exchange Help Bell to confirm priority levels and contact subject-matter experts for question attention.  Check out this how-to article for more information.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

It happens many times that access list (ACL) have to be applied to outgoing router interface in order to limit some traffic.This article is about how to test ACL from the router which is not very intuitive for everyone. Below scenario shows simple s…
Quality of Service (QoS) options are nearly endless when it comes to networks today. This article is merely one example of how it can be handled in a hub-n-spoke design using a 3-tier configuration.
After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…
After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…

916 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question