Load balance on WAN interface using static router between two ISP

10 pts.
Tags:
Cisco 1841
Cisco router configuration
Cisco Routers
Failover
Leased line management
Load balancing
Network administration
Network design
Router configuration
Routers
WAN
By using static router, i need to configure two lease line of 3 mbps and failover
ASKED: March 31, 2009  6:12 AM
UPDATED: December 26, 2010  4:44 AM

Answer Wiki

Thanks. We'll let you know when a new response is added.

The protocol you need to use for that is the Border Gateway Protocol, or BGP. You’ll need at least a /24 (class C) address space from each provider. ISP’s don’t forward BGP for smaller address ranges than that. Normally, one ISP is the primary and the other is the backup. While it’s possible to propogate multiple routes to load balance inbound traffic, outbound is usually router to one ISP or the other, not both. You can only have one default route. Setting up BGP is not trivial and I’d recommend that you consult with a network professional to set it up, interface to the ISP’s and document it all for you.

@@@@@@@@@@@@@@@@@@@

To get load balancing to happen, you need equal cost routes pointing to the interfaces involved in the load balancing. For example, on Router A load balancing 2 T1′s, the show ip route output might include something like this:

S* 0.0.0.0/0 is directly connected, Serial0/1
is directly connected, Serial0/0

And on Router B the show ip route output might include something like this:

ip route 192.168.8.0 255.255.255.0 Serial1/3 10
ip route 192.168.8.0 255.255.255.0 Serial1/0 10

Discuss This Question: 1  Reply

 
There was an error processing your information. Please try again later.
Thanks. We'll let you know when a new response is added.
Send me notifications when members answer or reply to this question.

REGISTER or login:

Forgot Password?
By submitting you agree to receive email from TechTarget and its partners. If you reside outside of the United States, you consent to having your personal data transferred to and processed in the United States. Privacy
  • Hidayat
    If it is Lease Line(3Mbps) - ISP is not in picture both end's are under your control. 1) IF Route base FAILOVER is required - can be done with Administrative distance FYI/Suggested 1) If LOAD BALANCING & Failover is required - you can user MSHRP at both the end- and statically manage gateway to run static load balance the link. 2) BGP - is also good option as suggested above - Check the hardware requirement in terms of CPU cycles requirement.
    25 pointsBadges:
    report

Forgot Password

No problem! Submit your e-mail address below. We'll send you an e-mail containing your password.

Your password has been sent to:

To follow this tag...

There was an error processing your information. Please try again later.

REGISTER or login:

Forgot Password?
By submitting you agree to receive email from TechTarget and its partners. If you reside outside of the United States, you consent to having your personal data transferred to and processed in the United States. Privacy

Thanks! We'll email you when relevant content is added and updated.

Following