Go Premium for a chance to win a PS4. Enter to Win

x
?
Solved

Using Switched Ethernet & Keeping MPLS as a backup.

Posted on 2011-02-22
7
Medium Priority
?
414 Views
Last Modified: 2013-11-13
Hello, Our network currently consist of 30+ remote offices all using MPLS to connect to our Headquarters. We want to use Switched Ethernet & keep the existing MPLS as a backup. has anyone done this?   I am mainly wondering how we would maintain the routes for the MPLS network if that WAN link went down.  We use BGP and EIGRP.
0
Comment
Question by:wymanda
7 Comments
 
LVL 28

Accepted Solution

by:
asavener earned 2000 total points
ID: 34958661
As long as you have interfaces on your routers to support the additional connections, it shouldn't be a problem.

You will need to adjust the routing metrics so that the new switched ethernet connections are preferred above the MPLS connections.
0
 

Author Comment

by:wymanda
ID: 34960050
Thanks (asavener) I understand precisely what you have said in your reply.  That was already part of my design so the reassurance is great.  The issue that I really need to understand though is what happens to all the EIGRP learned routes from the MPLS connected interface if that link were to go down.  The Switched Ethernet WAN connection will become the primary, but lets assume that both interfaces are ok and that my routing table is complete.  Next lets assume the MPLS WAN link goes down long enough that the Routes are removed, then the Switched Ethernet Link goes down, and the MPLS connected interface comes back up.   The Router will need some time to repopulate the routing table with BGP neighbor associations and learned EIGRP routes.  This could take some time.  There must be a way to modify the config so that the time frame that the EIGRP routes remain in the routing table are sufficient enough to cover this scenario.
0
 
LVL 28

Assisted Solution

by:asavener
asavener earned 2000 total points
ID: 34960806
The process you are describing is called "convergence".  Every routing protocol takes some time to converge the routes when the topology changes.  If you need faster convergence, then you should probably consider a link-state routing protocol such as OSPF.

If site A has two connections to site B, then the topology table for the routing protocol should have both routes.  When the primary connection goes down, the routing protocol may wait briefly to see if it's just a missed hello packet, but it will then remove the failed route and start using the secondary route.
0
What does it mean to be "Always On"?

Is your cloud always on? With an Always On cloud you won't have to worry about downtime for maintenance or software application code updates, ensuring that your bottom line isn't affected.

 
LVL 32

Expert Comment

by:harbor235
ID: 34961550


So I understand, are you saying you will use a layer2 service like VPLS or L2TPv3?  

harbor235 ;}
0
 

Author Comment

by:wymanda
ID: 35027410
harbor235:
"So I understand, are you saying you will use a layer2 service like VPLS or L2TPv3?"  

(Yes) the Switched Ethernet Service provide by Verizon uses these services.  They refer to it as "EVPL" Ethernet Virtual Private Line.  Much like PVC's and Frame Relay, Verizon's EVPL Metro service uses "EVC's" Ethernet Virtual Circuits.
0
 
LVL 71

Expert Comment

by:Qlemo
ID: 35308520
This question has been classified as abandoned and is being closed as part of the Cleanup Program. See my comment at the end of the question for more details.
0

Featured Post

Microsoft Certification Exam 74-409

Veeam® is happy to provide the Microsoft community with a study guide prepared by MVP and MCT, Orin Thomas. This guide will take you through each of the exam objectives, helping you to prepare for and pass the examination.

Question has a verified solution.

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

During and after that shift to cloud, one area that still poses a struggle for many organizations is what to do with their department file shares.
This month, Experts Exchange’s free Course of the Month is focused on CompTIA IT Fundamentals.
Viewers will learn how to properly install and use Secure Shell (SSH) to work on projects or homework remotely. Download Secure Shell: Follow basic installation instructions: Open Secure Shell and use "Quick Connect" to enter credentials includi…
Internet Business Fax to Email Made Easy - With  eFax Corporate (http://www.enterprise.efax.com), you'll receive a dedicated online fax number, which is used the same way as a typical analog fax number. You'll receive secure faxes in your email, f…

926 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