== =U R G E N T H E L P ===

[johan123]

Hi,

I am working in an ISP. We have two internet duplex serial links from two different service providers via satellite. One is 128kbps and one is 64kbps. I am using static routes.
Now I start my question. I want special configuration in such a way that when my one link get congested all traffic should divert to another serial link. If you people remember we do like this in dial backup where when our primary link get congested router dials and do a load balance. ( I read this scenario in BCRAN 2.0).
Any help in this regard would be highly appreciated.
Actually I am using transparent proxy whose default gateway is 128kbps link and where i implement a route map which uploads all traffice from my proxy machine to 128 kbps link. One more thing I am using recieve only service for http traffic and I exactly want that when my 128kbps link get congested the packets coming from my proxy machine should uploaded using 64kbps link. I have cisco 2621 router with two smart serial and ehternet interface and I configured both the interfaces ip address based on two different ip class blongs to my two service provider.
Thanks and Regards,
Johan

 

[wybnormal]

There are many way to do this.. overhead birds have the added disavantage of latency. You need to allow for this no matter what you choose.

You can do a "round robin" per packet load balancing by turning off route switching. This forces the router to send one packet to one link and the next packet to the second link. The tradeoff is a high CPU utilization since you are processing the packets one at a time.

Routing protocol like EIGRP can load balance based on traffic load.

http://www.cisco.com/warp/public/103/eigrp9.html

OSPF can offer the same thing with a slightly different twist to it.

You can do policy routing and force certain types of traffic OR certain ranges of IPs ( by access list) to use a certain a certain port.

http://www.cisco.com/warp/public/105/36.html

More then likely you will use a mix of this.

MikeS
"Diplomacy; the art of saying 'nice doggie' till you can find a rock" Wynn Catlin

 

[jeter]

I agree with Mike. Now the question that i have if your working as an Isp. Then why don't you go with a higher bandwidth? 128K and a backup 64 is just not going to be very stable. Jeter@LasVegas.com
J.Fisher CCNA

 

[johan123]

Thanks for your kind advise.
I appreciate your way of thinking but my original question was that can we do like we did in case of dial bakup where our router dials and divert all traffic to that backup link in the event of excessive load. Since we are in asia and the bandwidh is very costly here that's why we are using 128k and 64k but we are using downlink receive only service of 1MB.

Thanks and Regards
Johan