BGP Load Balancing

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By Ivan Pepelnjak

Early Cisco IOS releases did not support load balancing in networks using Border Gateway Protocol (BGP) as their core routing protocol. The BGP implementation in Cisco IOS has evolved since then, resulting in a number of load balancing options for BGP-based networks. These options include:

  • IGP-based load balancing toward BGP next hops
  • EBGP load balancing between a pair of routers
  • EBGP load balancing between multiple EBGP neighbors of the same router
  • IBGP load balancing between alternate IBGP paths
  • Unequal-bandwidth EBGP load balancing with BGP link bandwidth feature

Read more in the "Load balancing in BGP networks" IP corner article ...

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