[Last Call] Learn how to a build a cloud-first strategyRegister Now

x
?
Solved

OSFP Design Considerations for 3-site network across MPLS

Posted on 2013-06-23
6
Medium Priority
?
543 Views
Last Modified: 2013-06-24
Hi Experts,

We have three sites joined by T1s. We are migrating to an MPLS cloud. We currently run OSPF with multiple areas, and our MPLS provider asked us to simplify our OSFP configuration by using a single zone across all sites. From a network perspective, every site will be the same. Starting at the internet and working in, each site will look like this:

Internet --> Internet Provider Router --> Firewall --> LAN Router --> MPLS Provider Router --> MPLS Cloud

We aren't very familiar with OSPF, and we'd like to verify that it's possible to have a single OSFP area (Area 0) across all three sites. The devices participating in this would be:

- Firewall (inside interface)
- LAN Router (all interfaces)
- MPLS ROuter (Lan-side interface)

Note: We plan to inject OSPF into BGP for routing in the MPLS cloud.

Thank you!
0
Comment
Question by:meade470
  • 3
  • 3
6 Comments
 
LVL 50

Expert Comment

by:Don Johnston
ID: 39271135
How many routers and how many networks?
0
 
LVL 2

Author Comment

by:meade470
ID: 39271461
We are a small organization. Each site has only one router that we manage (not including the internet and MPLS routers, which we don't manage). And our ASAs (one per site) participate with OSFP. We have about 2 - 5 networks per site.
0
 
LVL 50

Expert Comment

by:Don Johnston
ID: 39271506
Then a single area is fine.
0
Free recovery tool for Microsoft Active Directory

Veeam Explorer for Microsoft Active Directory provides fast and reliable object-level recovery for Active Directory from a single-pass, agentless backup or storage snapshot — without the need to restore an entire virtual machine or use third-party tools.

 
LVL 2

Author Comment

by:meade470
ID: 39271579
Thanks! I have a couple of quick follow-ups, if you don't mind.

1.) We'd like all networks on each router to participate with OSPF (we have several networks on subinterfaces). Would the command for this be:

router ospf 1
 network 0.0.0.0 255.255.255.255 area 0

2.) Our current OSPF configuration has "area ranges" defined, such as this:

router ospf 1
 area 1 range 192.168.24.0 255.255.248.0

Is this necessary given our small network? Would you advise continuing with this command?
0
 
LVL 50

Accepted Solution

by:
Don Johnston earned 2000 total points
ID: 39271700
router ospf 1
 network 0.0.0.0 255.255.255.255 area 0
That's one approach (and it works). Personally, I prefer a separate network statement for each interface.

router ospf 1
 network 192.168.1.1 0.0.0.0 area 0
 network 192.168.2.1 0.0.0.0 area 0
 network 172.16.12.1 0.0.0.0 area 0
 etc...

Open in new window


area 1 range 192.168.24.0 255.255.248.0

Is this necessary given our small network? Would you advise continuing with this command?
The area range command is used to summarize routes on an area border router. Since you'll be a single area environment, there is no summarization. So it unnecessary and will not accomplish anything.
0
 
LVL 2

Author Closing Comment

by:meade470
ID: 39271715
Awesome. Thanks for all your help!
0

Featured Post

Free Tool: Path Explorer

An intuitive utility to help find the CSS path to UI elements on a webpage. These paths are used frequently in a variety of front-end development and QA automation tasks.

One of a set of tools we're offering as a way of saying thank you for being a part of the community.

Question has a verified solution.

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

AWS has developed and created its highly available global infrastructure allowing users to deploy and manage their estates all across the world through the use of the following geographical components   RegionsAvailability ZonesEdge Locations  Wh…
Microservice architecture adoption brings many advantages, but can add intricacy. Selecting the right orchestration tool is most important for business specific needs.
This video gives you a great overview about bandwidth monitoring with SNMP and WMI with our network monitoring solution PRTG Network Monitor (https://www.paessler.com/prtg). If you're looking for how to monitor bandwidth using netflow or packet s…
There's a multitude of different network monitoring solutions out there, and you're probably wondering what makes NetCrunch so special. It's completely agentless, but does let you create an agent, if you desire. It offers powerful scalability …

830 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