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Load Balance between 2 Cisco 3750 switches with equal-cost paths

Hi,

I have two offices in rural area with a quite distance between them. Offices are connected with private wireless 100Mbps and cooper 100Mbps links provided by different ISP. Wireless connections are delivered as a private L3 Ethernet link but cooper as private L2 Ethernet trunk link. In both offices I have Cisco 3750 L3 switches. I would like to use both link (equal-cost paths) in load balanced configuration but not sure how. Both switches running EIGRP. Asymmetric routing is not an option. Per-destination load-balancing or something else?

Any help is appreciate

Thanks

5 REPLIES
Super Bronze

Load Balance between 2 Cisco 3750 switches with equal-cost paths

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Not quite sure how you avoid asymmetrical routing when load balancing.  Could you clarify this requirement?

Community Member

Load Balance between 2 Cisco 3750 switches with equal-cost paths

I'll be sending voice traffic via these links. Can somehow load balancing be symmetric or do I have any other solution to aggregate these two links?

Re: Load Balance between 2 Cisco 3750 switches with equal-cost p

could you route the copper Ethernet link? If so you could adjust the metrics to be equal cost at which point load balancing would be automatic.

Sent from Cisco Technical Support iPad App

Load Balance between 2 Cisco 3750 switches with equal-cost paths

If on both link cost are equal (as per EIGRP resulted metric from both links) then EIGRP will do load-balancing by default.

However if both links cost are resulted in not equal metrics, then you can enable unequal cost load-balancing, please follow the Cisco documentation.

http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a008009437d.shtml

I assume this is how your offices are connected.

               |-------wireless------ |           __  

| Office A  |                          | Office B |

|               |______wired____|             |

Thanks

Rizwan Rafeek

Hall of Fame Super Gold

Load Balance between 2 Cisco 3750 switches with equal-cost paths

I don't think that 3750 switches can do unequal cost load balacing.

One would need a true router for that, an is not a good idea anyway.

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