Solved

Load Sharing between Two links

Posted on 2009-05-17
3
270 Views
Last Modified: 2012-05-07
I have a CISCO 6500 with multiple SUP cards( for redundancy) peering with two diffrent ISP for BGP v4.

ISP1  ISP2
 |     |  
 |     |
Router1

I understand i can share the inbound traffic using AS prepnding but how do i make outbound sharing work ?

I need both lines configured for redundancy and increased throughput..

I am getting default routes from both isp's .


0
Comment
Question by:pehalwaan
[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
3 Comments
 
LVL 3

Author Comment

by:pehalwaan
ID: 24409208
Is this which is required ?

router bgp 50
neighbor 1.1.1.1 remote-as x
neighbor 1.1.1.1 prefix-list denyall in
neighbor 2.2.2.2 remote-as y
neighbor 2.2.2.2 prefix-list denyall in

ip route 0.0.0.0 0.0.0.0 1.1.1.1
ip route 0.0.0.0 0.0.0.0 2.2.2.2

ip prefix-list denyall 0.0.0.0/0 le 32
0
 
LVL 43

Accepted Solution

by:
JFrederick29 earned 500 total points
ID: 24411439
Try using this config:

router bgp 50
bgp bestpath as-path multipath-relax
maximum-paths 2
0
 
LVL 8

Expert Comment

by:Brain2000
ID: 24456778
These are both good solutions.  Let me add to them.

pehalwaan's way is good for equal lines and doesn't require BGP.  Just make sure CEF is enabled so it will do per-destination load balancing.  You will also want to make sure you add SLA Tracking onto the "ip route 0.0.0.0" commands or else you'll get a black hole to half your routes if one of the ISP's goes offline.  This method also does not offer you any control over how much it load balances or if the best gateway is used for a particular customer.

JFrederick29's BGP method will work for BGP outgoing.  I would also recommend a higher level of quality control by adding OER into the mix.  It can be configured to use netflow and ICMP pings (passive and active monitoring) and will adjust which gateway is used by injecting new BGP routes.

OER introductory documentation can be found here:

http://www.cisco.com/univercd/cc/td/doc/solution/tdprpdgx.pdf
http://www.cisco.com/en/US/docs/ios/12_4t/oer/configuration/guide/h_oerstr.html

It's a lot of pages, but don't let it get you down.  A final OER configuration usually isn't more than 20-30 lines of config.  Cisco is just very thorough in explaining it.
0

Featured Post

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.

Question has a verified solution.

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

In the world of WAN, QoS is a pretty important topic for most, if not all, networks. Some WAN technologies have QoS mechanisms built in, but others, such as some L2 WAN's, don't have QoS control in the provider cloud.
I recently attended Cisco Live! in Las Vegas, a conference that boasted over 28,000 techies in attendance, and a week of hands-on learning hosted by a solid partner with which Concerto goes to market.  Every year, Cisco displays cutting-edge technol…
After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…
After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…
Suggested Courses

707 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