Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Announcements

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. And see here for current known issues.

New Member

Connecting three separate networks with ethernet fiber

I want to connect three separate locations with a 50MB fiber link.

The equipment is 4506/L3, 3550/L3, 2621.

I currently have them communicating on a common addresses of 192.168.101.2, .60 and .199. There are multiple VLANs at the first two locations.

What is the best method to use between them?

Could/should they trunked together?

I can provide what ever configuration information that would be helpful.

Thank you for any assistance.

Lou

7 REPLIES
New Member

Re: Connecting three separate networks with ethernet fiber

Do they same vlans exist a multiple locations, i/.e do you vlan 10 on the 4506 to be the same vlan 10 on the 3550 then I would use a dot1q trunk.

A trunk will allow you to access multiple vlans across the fiber using 1 port at each location.

The common subnet is that using vlan 1 for your management vlan ?

New Member

Re: Connecting three separate networks with ethernet fiber

Each location has separate distinct vlans. I want to pass traffic across the link to different vlans using EIGRP to manage the routing.

For example: location A(vlan 10 / 192.168.10.17) to Location B (vlan 190 / 192.168.190.88)

If this is not clear I can post a drawing.

Thank you,

Lou

New Member

Re: Connecting three separate networks with ethernet fiber

Sounds like distinct subnets that are totally segregated, The routing should be fine, trunk only if you need higher aggregated bandwidth by using a etherchannel will 50mb across the fiber meet your needs.

New Member

Re: Connecting three separate networks with ethernet fiber

I think you should post some diagrams, I'm unsure of what you are trying to acheive.

Some ppl have suggested trunking , while you wish to use EIGRP. Please post a diagram and VLAN assignemts at each site.

When you say connect the three sites, do you mean connect them into a triangle? Or do you want to connect to all three locations from one central site?

New Member

Re: Connecting three separate networks with ethernet fiber

Here is a diagram I hope helps. The ip addresses 192.168.101.x are assigned at each location.

I am open to suggestions on the best way to configure this arrangement.

If you need more information let me know

Thanks,

Lou

New Member

Re: Connecting three separate networks with ethernet fiber

Other more experienced readers should correct me if I am wrong.

--------------------

How does the traffic flow? Since there are only 3 sites, I would personally go for simplicity and that is to use the Primary location as the distribution L3 switch. Create all the VLANs there and trunk them across to the two sites.

The disadvantages of this design is that traffic going from the third site to second site and vice versa will need to travel back to the primary.

If this happens alot, then dont use this design..

New Member

Re: Connecting three separate networks with ethernet fiber

Thank you for the suggestion.

Most of the traffic will flow from the primary to the backup. The third site is our Internet access location. So the backup site will need to access it directly for best response.

Lou

202
Views
0
Helpful
7
Replies
CreatePlease to create content