Solved

Cisco 3750 stack switch between multiple buildings route as distribution layer to core with multiple distribution layers routed

Posted on 2008-10-14
3
2,544 Views
Last Modified: 2009-12-16
I have multiple buildings and would like to route at the distribution layer from each building.   I have two stacked 3750 switches at each building for redundancy.   There is fiber between each building.  Total of three buildings.  We will call them building 1, 2 , and 3.  Building 3 has the distribution switch that goes through building 2 via Fiber.  Building 2 traffic is aggregated with building 3 traffic which eventually makes it to the core at building 1.   This is the Fiber layout.  The buildings are close together.   I need to route from building 3 to building 2.  The access layer switches are 3com with no Vlan support they will just connect to the distribution switches.  Then I want to route the traffic from there.  I am not sure about layer 3 design routing with multiple Vlan's that represent subnets.  How do you get the routing to go from one end say building 3 to building 2 and then to building 3 and visa versa.  Say I use 10.0.1.x through 10.0.10.x at a class C subnet mask.    Could I create all static routes between the stacked switches?  But if I have more than one subnet on a switch how do you route traffic between the two.  The master 3750 switch in the stack acts as a single router as far as the mac address is concerned.   So I think for every IP addres default gateway per subnet it will us the mac address with the different default gateway.  For example;  10.0.1.1    and  10.0.;2.1   and on the other side would I setup the same vlans and different IP address combinations?  For example 10.0.1.2  and 10.0.2.2.  If I have two fiber connections between the stacked switches how does routing work?
0
Comment
Question by:asmusjer1
  • 2
3 Comments
 
LVL 33

Expert Comment

by:MikeKane
ID: 22716202
If you want to isolate broadcast traffic from each building, then, depending on your specific needs, you would create a VLAN to represent each logical network.   From what I understand each building would be a VLAN.   On each switch you would create the VLAN and since you have a Fiber uplink between the buildings, you would use the FIBER as your tunking port between the switches.     You can then route using static commands, or EIGRP between each VLAN  point.  

You can use one single master switch if you want to use statics routing....  it would work, especially if the one uplinks all the other fiber leads....  

Hope that helps.
0
 

Author Comment

by:asmusjer1
ID: 22716809
I am confused about the specifics of setting up the routes.  For example if each switch represented two vlans with a 3750 switch then you need two static routes.  A stack design makes it complex because you need to route each vlan in some form.  That is if you routed from the distribution layer at each building.  You really can't use a default route or an ip default gateway between the two seperate distribution switch racks because again two many routes.  Maybe a need to look at this like a router with multiple network cards.  You would have to setup each Vlan on all of the switches with the routing but the default gateway routes would be different on each switch stack for the vlans.
I guess I am confused with Routing when redundancy comes into play.   If I could get a traditional routing example maybe with multiple ethernet cards per each router.  Then corolate this to 3750 stack switch design.  Not sure if any one can help.
0
 
LVL 33

Accepted Solution

by:
MikeKane earned 500 total points
ID: 22933432
0

Featured Post

PRTG Network Monitor: Intuitive Network Monitoring

Network Monitoring is essential to ensure that computer systems and network devices are running. Use PRTG to monitor LANs, servers, websites, applications and devices, bandwidth, virtual environments, remote systems, IoT, and many more. PRTG is easy to set up & use.

Question has a verified solution.

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

I recently attended Cisco Live! in Las Vegas, a conference that boasted over 28,000 techies in attendance, and a week of hands-on learning hosted by a solid partner with which Concerto goes to market.  Every year, Cisco displays cutting-edge technol…
David Varnum recently wrote up his impressions of PRTG, based on a presentation by my colleague Christian at Tech Field Day at VMworld in Barcelona. Thanks David, for your detailed and honest evaluation!
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…
As a trusted technology advisor to your customers you are likely getting the daily question of, ‘should I put this in the cloud?’ As customer demands for cloud services increases, companies will see a shift from traditional buying patterns to new…

840 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