Networking & wireless forum: 2 modem 2 router 2 switch 1 network ( is it posible?)

... network two private networks ? And the two share resources ? How far apart are the two shops ?

[Some may find it hard to understand your diagram. Most, if not all, are not experts here.]

Hi.
I am afraid I was unable to interpret the diagram that you had provided. However, based on your narration I drew the following conclusions and my solution is based on the same:

Assumptions:

1. There are two shops, each with an individual router connected to the internet.
2. Each of the router is connected to the switch in the respective shop.
3. The computers in the shops are connected to the respective switch.

If this is correct then read on, otherwise, please explain the network again.

Solution:

We will need to reconfigure both networks with separate Ip addressing schemes. Two Ip ranges are necessary as two separate routers are used. One router will allow 'Network 1' to connect to the internet through it.
Second router will allow 'Network 2' to connect to the internet through it.
We will use a third Ip addressing scheme common to both the networks to allow them to act as a single LAN.

Shop number 1:

1. You need to reconfigure the networks Ip addressing scheme.

Set the routers Ip address as 172.16.1.1/255.255.255.0.

2. Use the appropriate Ip address' with the computers, ie. 172.16.1.3, 172.16.1.4, 172.16.1.5, ... Use the mask 255.255.255.0

3. The gateway address on computers will be routers Ip - 172.16.1.1

4. DNS addresses I use are 156.154.70.22 and 156.154.71.22. These are provided by 'Comodo' so I trust them. You can also use these.
Or you can set the DNS to a simple 172.16.1.1

Shop number 2:

(Copy of the above with the changes)

1. You need to reconfigure the networks Ip addressing scheme.

Set the routers Ip address as 172.17.1.1/255.255.255.0.

2. Use the appropriate Ip address' with the computers, ie. 172.17.1.3, 172.17.1.4, 172.17.1.5, ... Use the mask 255.255.255.0

3. The gateway address on computers will be 172.17.1.1

4. DNS address' I use are 156.154.70.22 and 156.154.71.22. These are provided by 'Comodo' so I trust them. You can also use these.
Or you can set the DNS to a simple 172.17.1.1

Final step:

Configure an additional Ip addresses on all the computers of both the shops.

Implement the following steps on all the computers:

Assuming you are using 'Windows' operating system:

a. Open control-panel

b. Double Click on network connections

c. Right click on the appropriate 'Network Interfaces' - local area connection - icon and select 'Properties'

d. From the list in the general tab, select and highlight 'Internet Protocol TCP/IP'

e. Click on properties.

f. Click on 'Advanced'

g. Now in the 'IP Settings' page, There is a heading 'Ip Addresses' with
a button titled 'Add'.

h. Click on the button 'Add' and enter the following Ip address applicable to each computer -

Ip - 172.18.1.3 Mask - 255.255.255.0 for the first computer,
Ip - 172.18.1.4 Mask - 255.255.255.0 for the second computer,
Ip - 172.18.1.5 Mask - 255.255.255.0 for the third computer,

and so on.

i. When connecting for the purpose of using the games, use the last range of Ip addresses, the network will work as a single LAN.

j. Also use a cross cable to connect the switches within the shops. If you may be able to provide me with the model number of the switches I may be able to provide further information on the cabling.

k. I have a habit of leaving first two Ip addresses as they are required at times for other purposes. You may use them, but that might complicate the numbering.

I hope this will be of some help.
Take care.

This is 3 years old and you've hijacked an old thread.

Research this -> MODEM BONDING.
Bob

Thanks navneetgaur.... and also to those who post suggestion thanks a lot... i will try this today and will let you know if it works...

ok heres the thing. I got 2 modems, 2 routers, plugging into 1 switch, with 6 computers coming off of the switch... soon to be 10

modem modem
| |
router router
| |
\----------SWITCH------------/
| | | | | |
PC PC PC PC PC PC


using ip scheme
192.168.0.1 DG
192.168.0.11-16 as static for PC's
255.255.255.0 as subnet mask
192.168.0.1 as DNS

Periodically the computers completely lose internet connection. Sometimes for 10+ minutes. I am thinking that the 2 routers have the same ip address. Could that be the problem and all I have to do is change one of the routers to 192.168.0.2 ?

Also 156.154.70.22 and 156.154.71.22 are through comodo?
Have you tried open DNS ones at 208.67.220.220 and 208.67.222.222?

What do you thinks better and why?

The reason I designed it that way is because the 6 computers are used to for family members to contact their loved ones currently deployed in our US military.

Thank You

Hi.

1. You have mentioned that you have two modems and two routers.
2. Please provide the manufacturer company's names and model numbers for all "four ?" of them.
3. You will be able to work with a single switch, so do not be concerned about that. However please provide its model number too.
4. You might have already found a solution, however if not, disconnect and disable one of the "modem + router ?" combinations.

5. Comodo is a company that provides security solutions such as firewall and antivirus. Its firewall is a very efficient and powerful product and one of the best software firewalls in my knowledge.
When we connect to internet, our requested address', for example www.google.com, is sent to DNS server so that its final IP address can be found.
This IP address is sent back to our computer and our computer connects to the IP address.

Here are a couple of problems:

a. If these IP address are manipulated,your computer will send the message to the "IP" it thinks is google.com, because DNS server told it so.

That is not the problem with OpenDNS.
It is called DNS poisoning.

b. However, Comodo maintains an updated list of phishing, malware and such sites and if your requested sites IP matches that list it actively warns you about the site instead of opening the infected page on your computer. Saves a lot of trouble, for me at least.

Take care.

Hi.

1. I will need the model numbers along with company names of all the switches and routers. That will include the switches used for LAN and thin clients too.

2. I am under the impression that the internet speed would have been slow in two to three segments of your original network, not all.

3. Please let me know the segments that have the slowest internet speed compared to others.

4. You can check that using bandwidth monitor with in Cnet "http://reviews.cnet.com/internet-speed-test/?tag=contentMain;contentBody", on each of the four segments. First wired LAN, then each of the thin clients cluster and finally the wireless lan.
5. Please provide the details accordingly.

Take care.

Hi.

1. I am working on it and it may take a couple of days.

2. However this is what is evident:
a. Bandwidth does not seem to be the problem as all the segments are receiving sufficient throughput.
b. At this stage I can think of two probable causes for the request timed out problem:
i. dns server issue.
ii. Problem with D-link switches, they are always problematic.

3. Disable IPv6 on the computers, remove the tick mark along its side in the network card properties.

I will get back to you with further suggestions. However, in the meanwhile, change the dns server address to 156.154.70.22 and 156.154.71.22. Also try to use switches from another company.

I need to work on the new layout, so I will be able to help you once I have gone through the operational manuals of the routers.

Take care.

With all that double NAT going on this must be a painful system to configure. Not to mention other issues.

I would not have used the WAN ports on the second routers down the line. But it's a business so they may need to get some help from Cisco engineers.
Bob

I'm right behind you. Literally. Not long ago I was on a team writing routing code inside a little box that did many interesting other things plus routing.

So while I don't do the CCNP this setup looks over complicated to me. There is that other configuration where we don't use the WAN ports downstream and it sidesteps a lot of issues.

Just thinking.
Bob

As to item 3 (reduced traffic) I found since the hubs were switching hubs, only traffic that needed to go to another place actually went there.

Every once in awhile you find an old school network person that needs an update about that.
Bob

1. I work as a CCNP - Routing & Switching Instructor and a network consultant.

2.
That's why I am working on it even with the complications of using home
segment oriented routers in this manner. If anything, it is an
interesting setup.

actually sir when i got here in the office i've already questioned the equipment used in our network..because of cost cutting they ended up buying those and at that time we have only 20 staff..right now we have tripled so as the pcs and thin clients..i just do what i know is best for us with the existing equipment and what is provided sir..

3. Came to think of it, lakay_ibanag, what it
the final network layout that you want to establish? I understand the
requirement and you are working in the right direction, but anything
else you may need to point out.

i've change the previous setup due to reasons i've posted earlier sir..i came into this design to maximize the use of the static IP addreses and bandwidth provided by our ISP and to segregate the 3 servers (desktop & thin clients)..for the ease of troubleshooting, monitoring & maintenance..i've always wanted to solved our staff's complaints regarding those issues with our emails (godaddy), internet connection (resets/time outs), file and printer sharing of the 3 networks..

thanks sir..(",)

Hi.

1. I am sorry but I have not been able to take out time to analyze the devices of your network as yet. Occupied with some work.

2. No, I am not suggesting anything as yet. Personally I like the setup that you have established. Leave it as it is for the while.

3. I will send a diagram to you, so that you can complete the IP addressing with in that diagram.

4. The major issue right now is file and print sharing - as far as I can make out. That is an easy thing to tackle, one way or the other (I hope I don't have to eat my words), so do not worry about it too much.

5. The reason I am taking time is I really need to familiarize my self with your equipment.

Bob.

1. As I said I did not go through the devices as yet. Thankfully you did.

2. If there are switched hubs, then they will definitely be a reason for request timed out errors.

Just give me a days time. I have to wind up a seminar tomorrow at one of the local institutes, then I will be able to give time to this network.

Take care.

Hi.

1. Here is suggestion number one.

a. For file sharing, create an FTP server using Linux - if cost is an issue or otherwise. Place it on dlink des-1008a 8port switch1 - the one that is attached to the modem. Assign it an IP address from the range assigned to you - aaa.bb.cc.xx. Do not assign a gateway and DNS server address to it.
b. This server will be accessible to all the computers with in the network.
c. It will also simplify file sharing. Everyone will need to know one IP address - that of the server. They will be able to open the 'ftp://aaa.bb.cc.xx' on their browser, paste the files or copy them from the site.

d. It will be easier if you placed the shared printer along with the FTP server too.
e. Let me know if this suites your requirements.

Take care.