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Needing Instructions for Configuring IP Address Range within a Linksys 802.11 G Broadband Wireless Router (Model WRT54G)

Posted on 2007-11-23
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Last Modified: 2013-11-09
Hi Everyone:

        This question is basically an extension of an already opened post regarding possible solutions to resolving IP address conflicts among network devices.  One suggestion given was to expand the IP Address range within the router.  I understand I will of course need to log into the router given the router's IP address of 192.168.1.1.  However, I am uncertain with respect to other steps to execute after that point.  

         The router is a Linksys 802.11-G Broadband Wireless Router (Model WRT54G).  At the present time the last set of digits for each pc has different IP addresses, but, occasionally we do randomly get the IP address conflict.  But, all pc's at this time do have internet access, so, this problem seems self-correcting.  However, I would still like to know what the steps are involved in configuring the IP Address Range.

          Thanks in advance for any attention given to this post.

          George
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Question by:GMartin
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by:dlan75
dlan75 earned 500 total points
ID: 20340905
Hi,
Can you tell us if you have DHCP enabled, if there are any computers with static IP addresses?
To configure IP ranges, you have to go on the admin page of your router (192?168.1.1) and if DHCP is enabled, you can changed the distributed IP range just below.
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Author Comment

by:GMartin
ID: 20340936
Hi

         Thank you so much for your prompt reply.  With respect to determining whether DHCP is enabled on each pc, I am unsure how to determine that.  With regards to static IP addresses, I noticed each pc has a check mark by Obtain an IP address automatically.  However, underneath that, there is an option to either check Obtain DNS server address automatically or manually configure.  It has been configured manually with two separate numbers, one for Primary DNS and one for Alternate DNS.  The numbers are identical with the exception of the third set of digits.  And, these numbers are static DNS addresses as well.  

           The broadband connection being used here is DSL.  Any further comments regarding how to determine if DHCP is enabled on each pc will greatly be appreciated.

           Thank you.

           George
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by:dlan75
dlan75 earned 500 total points
ID: 20340956
Hi,
Ok if it says that ip addresses are obtained automatically, this means you have dhcp enabled but you should normally have the same for dns ! MAke sure you your router gives you dns settings as well.
Look on your router now :-)
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Author Comment

by:GMartin
ID: 20340966
Hi There:

       I am in the Administration area of the router.  However, I am unsure where to go next.  The options I see here are as follows:  Local Router Access which contains the router's password., Web Access with checks by HTTP as Access Server and Wireless Access Web is Enabled., Remote Router Access is disabled., and UPnP is enabled.  

       Thank you

       George
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Accepted Solution

by:
dlan75 earned 500 total points
ID: 20341000
Hi,
On one of the pages (probably where you have your http settings), you should see DHCP enabled. Just below that you can select the start IP adress which is given to computers on your networks and the last one given (you can then change the last one to a bigger number but less than 255). All IP adresses have to be in the same subnet (192.168.1.xxx and not 192.168.0.xxx for ex)
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Author Comment

by:GMartin
ID: 20341004
Hi

      How can I determine if the router has DNS settings?  To help clarify why there are numbers within the DNS settings of the TCP/IP stack of the network adapter for each pc is related to each pc being unable to load any web page.  From an earlier closed post, I addressed the issue of being unable to ping a domain address, like yahoo.com, however, I was able to ping the corresponding DNS address.
The conclusion drawn from this which resolved the problem is as follows:  The router had difficulty with DNS relaying.  Therefore, the server addresses given to the DSL modem which is normally distributed to each pc by the router was manually configured into the TCP/IP stack of each pc's network adapter.  

          George

     
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by:dlan75
dlan75 earned 500 total points
ID: 20341019
Hi,
It is possible, in that cas you should contact linksys (they give free support normally) to see why your router is having troubles relaying dns. Maybe it has some problems and it has to be changed (happened once to me).
When your router is connected to the net, if you look at the connexion status (don't remember exaclty where it is but you should find it easily), it should display the dns.
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Author Comment

by:GMartin
ID: 20341044
Hi

      Ok.. I think I am in the right place now.  I see a starting IP Address of 192.168.1.100.  The maximum number of DHCP users is 50.  However, I do not see an are for ending IP address.  However, I see empty areas for Static DNS 1, Static DNS 2, Static DNS 3, and WINS.  

       George
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by:dlan75
dlan75 earned 500 total points
ID: 20341086
Ok that seems fine to me. Normally your computers should get an ip from the router and be able to connect to the internet and see eachother.
Can you check that it is working? If not, I really suggest you contact linksys to get them to see why you have dns problems and eventually why you have ip conflict which should not be the case in this config.
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Author Comment

by:GMartin
ID: 20341178
Hi

        Apparently, each pc is getting an IP number from the router because all of the pc's have internet access and have a unique IP Address as indicated by results of the ipconfig test.  As far as each pc seeing each other, I really do not have any kind of network set up.  Basically, each pc is connecting to the internet through the router and that is about it.  We do not have file or printer sharing set up.  

         George
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Expert Comment

by:dlan75
ID: 20341191
Hi, then so far if everything is working, your problem might be solved.
If from now on you get problems connecting to the net or if you have IP conflicts, do as I suggested : contact linksys as it might be a problem with the router
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Author Closing Comment

by:GMartin
ID: 31427337
Hi There;

       Thank you so much for your replies.  I certainly learned much from each of your thought provoking suggestions.  Especially interesting was the point your made that each IP address assigned must be within the same subnet, like 192.168.1.xxx in this particular scenario.  

        After visually inspecting the configuration of the router. I noticed the starting IP address is 192.168.1.100 with the maximum number of DHCP users set to 50.  The last set of digits could be edited or changed as well as long as it does not exceed 255 which I assume represents the total number of computers which can occupy the subnet of 192.168.1.xxx at the same time.  Given the starting IP address of 192.168.1.100 with a maximum number of DHCP users being 50, it is logical to conclude the IP address range for the current router configuration is 192.168.1.100 to 192.168.1.150.  Hopefully, I am drawing the correct conclusions here.

         In closing, thank you so much for helping to break all of this down for me.  Not only am I troubleshooting, but,  am learning newer information and skills as I go too.  

          Great job on this one!!!!   And, many thanks once again.

           George
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Expert Comment

by:dlan75
ID: 20390922
Hi,
I am happy that I could help you resolve your problem and that I could help you learn something :-)
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