load balance on WAN interfaces

5 pts.
Tags:
Cisco 2811
Cisco router configuration
Cisco Routers
Load balancing
WAN
How can I set up two 2811 routers coneected together with two leased lines with load balance. There are two 2M leased lines to form a 4M leased line for operation.
ASKED: February 2, 2009  3:52 PM
UPDATED: February 9, 2009  9:43 AM

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hi,
please enable “cef” on the router and it will take care of loadbalancing.

refer to the below link for details:

http://www.cisco.com/en/US/products/hw/modules/ps2033/prod_technical_reference09186a00800afeb7.html

Thanks
Nishant

There are a few ways to accomplish this task, and that will depend on what type of routing you are going to have between both sites. Also, I am assuming that your hand-off will be copper r-j5 connected to the ethernet ports on your routers, since you have a 2mb leased line. If you where to have serial connections, you could use multilink PPP

If you plan on using static routes:
- by default load-balancing will occur per-destination on equal cost routes, you will only see 2mb if you are using a bandwith tool
- you can enable load balancing per-packet on the interfaces and you will set 4mb, this is not recommened if you have real time traffic such as voice or video, since there is no mechanism in place for the packets to be sequenced and can arrive out of order

If you plan on using a rouing protocol
- all routing protocol load balancer per session for equal cost routes
- you can enable load balancing per-packet on the interfaces and you will set 4mb, this is not recommened if you have real time traffic such as voice or video, since there is no mechanism in place for the packets to be sequenced and can arrive out of order
- EIGRP will load balancer on un-equal cost routes by modifiying the variance

If there are only a few networks between both sites, there isnt a need for a routing protocol. If you have or plan on having a large amount of network between the two sites, I would implement a routing protocol.

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