Solved

VLan's for LAN Extension

Posted on 2006-10-26
8
252 Views
Last Modified: 2008-02-01
Hi Experts,

We have just gotton a WAN link upgrade to a 100MB FDX LAN extension which is connecting two geographically seperated offices and am trying to figure out if I could use VLANs instead of routers to connect the offices. Here's my network setup.

The offices are on seperate subnets and are part of the same domain.
We have a 10mg WAN link now connecting the offices which we will be decomissioning after we complet the transition to the LAN extension.
There are 2 DC's per office and of course DHCP servers in each office. Each office has it's own Gateway.
We have VLAN compatible switches on each end.

Basically I know I can use routers on each end to establish the WAN link. But Can this be done with VLAN's?
Some setup tips would be greatly appriciated, I can't figure out how traffic from 1 subnet would know to get to the other subnet without routing.

Thanks in advance

0
Comment
Question by:mike0107
  • 5
  • 3
8 Comments
 
LVL 79

Expert Comment

by:lrmoore
Comment Utility
>I can't figure out how traffic from 1 subnet would know to get to the other subnet without routing.
That's the problem with using switches. As long as they are separte subnets or VLAN's, then you must have some routing in the mix. Either a single "router-on-a-stick" or a router at each end to create the WAN link and do the routing.
A Layer3 switch would be most advantagous and best performing.

0
 

Author Comment

by:mike0107
Comment Utility
Thank you for your comment Irmoore, let me ask you this in a Router on a stick setup would the router connect to one interface in one city? Also I'm thinking that we will just go with two Routers 1 per city and do it the old fasion way. Would you be so kind as to recomend what routers you would use. There are 100+ users in one city and 50 users in the other. We would just want a simple routing setup.  
0
 

Author Comment

by:mike0107
Comment Utility
One more addition to this question.

If we had a layer 3 switch in one of the city's would it be setup so that the gateway for one city would actually reside accross the wan link.  
0
 
LVL 79

Expert Comment

by:lrmoore
Comment Utility
>in a Router on a stick setup would the router connect to one interface in one city?
Yes.

>Would you be so kind as to recomend what routers you would use.
Most anything with 100Mb interface. Cisco 2801 should be adequate. Create vlans on the switches, trunk an uplink to the router and create a sub-interface on the router. That's about as simple as it gets.

>If we had a layer 3 switch in one of the city's would it be setup so that the gateway for one city would actually reside accross the wan link.  
Yep. Same if you have a router on a stick.
0
Enabling OSINT in Activity Based Intelligence

Activity based intelligence (ABI) requires access to all available sources of data. Recorded Future allows analysts to observe structured data on the open, deep, and dark web.

 

Author Comment

by:mike0107
Comment Utility
Last addition IRmoore.

If we decide to put a CISCO router in each office would the 2801 be powerful enough. The WAN link is a 100MB FDX connection,
0
 

Author Comment

by:mike0107
Comment Utility
I guess we could also have one router in one office. HAve the lan EXt plug into one port and the other port plugs into the network of whatever city it resides in. Some of my fellow IT guys seem to favor one router one city. But I wonder how much Broadcast traffic would come accross the LAN ext. I like 2 routers 1 per city, maby thats because this is the usual WAN config.
0
 
LVL 79

Accepted Solution

by:
lrmoore earned 500 total points
Comment Utility
You can go either way. I'd start with 1x 2801 dual-Ethernet router at one end. If it becomes an issue, you can always put one on the other end..
0
 

Author Comment

by:mike0107
Comment Utility
Sounds great here's the points.
0

Featured Post

IT, Stop Being Called Into Every Meeting

Highfive is so simple that setting up every meeting room takes just minutes and every employee will be able to start or join a call from any room with ease. Never be called into a meeting just to get it started again. This is how video conferencing should work!

Join & Write a Comment

Suggested Solutions

Managing 24/7 IT Operations is a hands-on job and indeed a difficult one. Over the years I have found some simple tips and techniques to increase the efficiency of the overall operations. The core concept has always been on continuous improvement; a…
Even if you have implemented a Mobile Device Management solution company wide, it is a good idea to make sure you are taking into account all of the major risks to your electronic protected health information (ePHI).
Get a first impression of how PRTG looks and learn how it works.   This video is a short introduction to PRTG, as an initial overview or as a quick start for new PRTG users.
In this tutorial you'll learn about bandwidth monitoring with flows and packet sniffing with our network monitoring solution PRTG Network Monitor (https://www.paessler.com/prtg). If you're interested in additional methods for monitoring bandwidt…

763 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

Need Help in Real-Time?

Connect with top rated Experts

7 Experts available now in Live!

Get 1:1 Help Now