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To connect a cisco router to another cisco router

Posted on 2014-07-24
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Last Modified: 2014-08-16
I am hoping that you are able to help me. To connect a cisco router to another cisco router I belief I will need module interface serial for both cisco router (cisco 2811) if this is true ????? my question is when two o more cisco router a far away from each other eg. 1,000 feet (one building to another building) I need to get a 1,100 feet serial cable to connect one router to another router?.
 
Thank you for your help and videos?
 
I am studying for CCNA.
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Question by:jamesbondky
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Expert Comment

by:Akinsd
ID: 40218635
It depends
- You can directly connect two routers with cables or over the internet.
- The connection does not have to be serial although serial connections are widely used for WAN connection; RJ45 cables, Coaxial, or Optical connections may also be used.

Do the buildings have their onw internet connection already or are these routers going to provide internet access?
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Author Comment

by:jamesbondky
ID: 40219422
Thank you for responding, I understand if two office are distance apart you can use the internet to communicate using the routers. Company ABC firm started with 20 users and all of them were in one building, during the years it grew from 20 to 110 employees and now the firm is using two building distance less than 1,000 feet. They are using fiber optic to connect from one building to the other and each building has it own server one primary the other secondary. In case the primary fail (Hardware) the secondary take over using heartbeat technology.  

My question is:
1)What is the benefit having two sub net ( or more) ?
2)If you want to have more than one sub net and the router are far away between 150 to 900 feet, what type of interface you will use to connect the router?

Thank you again
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Akinsd earned 500 total points
ID: 40236544
1)What is the benefit having two sub net ( or more) ?

Open in new window


The benefit of having multiple subnets depends on your goals. Subnets can be compared with classrooms in school. With that said, it is important to note that it is recommended not to have more than 500 hosts in one subnet to minimize congestion.
Why multiple subnet
- Security eg restricting access globally based on subnet
- Ease of management
- Quality of Service (eg VOIP vlan should be dedicated and not shared with data etc. VOIP traffic should also be prioritized over other traffic)

You can have a dedicated subnet to Sales, HR, Management, Accounting, Finance, etc if you desire depending on ease of management or security concerns.


 2)If you want to have more than one sub net and the router are far away between 150 to 900 feet, what type of interface you will use to connect the router?

Open in new window

Subnet is not a magical word as may have discovered.
Routers are used to link 2 networks together. If you have 2 routers, one in each site, you automatically have 2 subnets (sub networks). You will have to link both of them up with routes. To have 1 subnet span through multiple locations, you need switching technologies to make that happen. Once a router is introduced, the network is automatically broken.

eg 192.168.1.1 /24 and 192.168.2.1 /24 are two separate subnets
but 192.168.1.1 /23 and 192.168.2.1 /23 both belong to the same subnet

Subnetting is a matter of design or structure. America has 50 states. This is the same as having 50 subnets. It is just about division. There can't be a part of California both in West Coast and East Coast because they've been separated by a boundary. The City of Richmond in California is not the same as the City of Richmond in Virginia despite the fact that they have the same name. They are separated by state boundaries.

Subnets are separated by router boundaries within 1 router or between 2 or more routers.

I hope this helps
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Author Comment

by:jamesbondky
ID: 40253759
I've requested that this question be deleted for the following reason:

I am still confused
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Author Comment

by:jamesbondky
ID: 40251810
no
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Expert Comment

by:Akinsd
ID: 40253760
Apologies if the above is not clear enough.
 Please look up video tutorials on subnetting on youtube.com

 Your question is what are the benefits of subnetting and the answer is

- Security eg restricting access globally based on subnet
  - Ease of management
  - Quality of Service (eg VOIP vlan should be dedicated and not shared with data etc. VOIP traffic should also be prioritized over other traffic)


 I hope that clears your confusion
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