Facing problem with load balancing

[niceshani]

I m using 2950,2960 and 3560 for redundancy b/w layer 2 switches and i have 3 2811 routers which using the three different internet connections of different isp's .I m facing the issue that when traffic comes on layer 3 switches from here i want load balancing with internet routers but i only able to access one router by entering the default route of only one router . . . So how can i load balance b/w internet routers when i m coming from layer3 switches . . . The topology is attached with this post . . . Thanx in advance

 

[burtsbees]

HSRP/GLBP/VRRP

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tim@tim-laptop ~ $ sudo apt-get install windows
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Couldn't find package windows...Thank Goodness!

 

[North323]

not sure your budget but check out the F5 or Big IP

 

[unclerico]

you should have hsrp or vrrp running on your L3 switches so that the access-layer has redundant paths up into your "core". From there I would use IP SLA monitoring with interface tracking for three equal-cost default routes on the 3560's. As long as you have CEF running on the 3560's it will distribute the traffic amongst the three default routes (per destination load sharing by default so it isn't necessarily true load balancing). You could also run performance routing/OER on the three 2811's so that circuit load, response times, and other metrics can be taken into account before choosing which link to forward the traffic.

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