Solved

T1 Load Balancing

Posted on 2004-08-09
12
337 Views
Last Modified: 2010-04-11
I have a Cisco 2610 with one Full T and one half T.  Both with different IP spaces from the ISP.  (Could they have the same IP space?)  How could the load balancing be done with a full and a fractional T?
0
Comment
Question by:GentooOS
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 4
  • 2
  • 2
  • +1
12 Comments
 
LVL 43

Expert Comment

by:JFrederick29
ID: 11752895
As long as it's the same ISP, you can use two equal cost default routes to your provider.

ip route 0.0.0.0 0.0.0.0 68.x.x.1
ip route 0.0.0.0 0.0.0.0 68.x.x.2

This will essentially load balance between the two T1's.
0
 

Author Comment

by:GentooOS
ID: 11753020
But one is only a fractional T.  Doesn't that matter?
0
 
LVL 43

Expert Comment

by:JFrederick29
ID: 11753140
No, it doesn't matter with static routes.  One link will be faster than the other, thats all.  If you were running a routing protocol with your ISP, it would matter as the full T1 would be used first, the second would be used as a backup link, unless you manipulated the route cost.
0
Easy, flexible multimedia distribution & control

Coming soon!  Ideal for large-scale A/V applications, ATEN's VM3200 Modular Matrix Switch is an all-in-one solution that simplifies video wall integration. Easily customize display layouts to see what you want, how you want it in 4k.

 

Author Comment

by:GentooOS
ID: 11753215
If one packet is sent to each T, the frac T will "run out" of bandwidth first but packet will still be sent to that T, correct?
0
 
LVL 43

Accepted Solution

by:
JFrederick29 earned 168 total points
ID: 11753306
It will simply send the packets round robin with no regard to network status.  If you are experiencing congestion on the fractional T1, yes, latency will be higher for those packets.  Ideally, you want to have equal size links.

If you want to simply use the fractional T1 for backup purposes only, use the same two default routes but add a higher administrative distance to the fractional T1 route:

ip route 0.0.0.0 0.0.0.0 68.x.x.1       <--- Full T1 (preferred route)
ip route 0.0.0.0 0.0.0.0 68.x.x.2 10  <--- Fractional T1 (backup route)
0
 
LVL 79

Assisted Solution

by:lrmoore
lrmoore earned 166 total points
ID: 11753459
If you want some load-sharing, enable CEF. The default load-sharing behavior is for per-connection instead of per-packet.

See more discussion here:
http://www.experts-exchange.com/Networking/Q_21085644.html
0
 
LVL 3

Assisted Solution

by:cmsJustin
cmsJustin earned 166 total points
ID: 11755693
CEF is defiantly the way to go. You will need to configure it on your router as well as call your ISP and have them set it up on their end. Their will be a momentary loss of service while they cofigure it. You get both lines out and one line in, and the one line in depends on the IP address used.
0
 
LVL 3

Expert Comment

by:cmsJustin
ID: 12559067
I think that points should be split between:

jfredrick
lrmoore

Both methods would work, and are equally valid answers.

-Justin
0
 
LVL 43

Expert Comment

by:JFrederick29
ID: 12559126
Very gracious Justin but I think it should be split 3 ways between:

lrmoore
cmsJustin
JFrederick29

We all contributed to the answer and had good information.
0

Featured Post

Technology Partners: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

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

Suggested Solutions

In this article, I am going to show you how to simulate a multi-site Lab environment on a single Hyper-V host. I use this method successfully in my own lab to simulate three fully routed global AD Sites on a Windows 10 Hyper-V host.
Most of the applications these days are on Cloud. Cloud is ubiquitous with many service providers in the market. Since it has many benefits such as cost reduction, software updates, remote access, disaster recovery and much more.
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…
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…

749 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