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Dell Networking Layer 3 Leaf-Spine Deployment and Best Practices with OS10 release 10.5.3.0.44
Introduction Hardware overview Leaf-spine overview Protocols in the leaf-spine example
Protocols used in the leaf-spine examples
Link Aggregation Control Protocol (LACP) overview
Uplink Failure Detection (UFD)
UFD vs. iBGP at the leaf layer
Rapid Spanning Tree Protocol (RSTP)
Routing protocols
Border Gateway Protocol (BGP)
Open Shortest Path First (OSPF)
Virtual Router Redundancy Protocol (VRRP)
Equal Cost MultiPath (ECMP)
Bi-directional forwarding detection
BFD in VLT Domain
BFD for BGP and OSPF
BFD tracking support in VRRP groups
VRRP interface state object tracking
Layer 3 configuration planning Layer 3 with Dell leaf and spine switches OSPF and eBGP Alternate use case scenario Demonstration Appendix A

Equal Cost MultiPath (ECMP)

Home > Networking Solutions > Enterprise/Data Center Networking Solutions > SmartFabric OS10 Networking Solutions > Guides > Dell Networking Layer 3 Leaf-Spine Deployment and Best Practices with OS10 release 10.5.3.0.44 > Equal Cost MultiPath (ECMP)

Equal Cost MultiPath (ECMP)

  • The nature of a leaf-spine topology is that leaf switches are no more than one hop distance from each other. Leaf 1 has two equal cost paths to Leaf 4, one through each spine, as shown in Figure 8. This topology applies to all leaf switches. ECMP is a routing technique used in a Layer 3 leaf-spine topology for load-balancing packets along these multiple equal cost paths. ECMP is enabled on all leaf and spine switches, allowing traffic between leaf switches to be load balanced across the spine switches.

    Figure 9.            Use of ECMP in a layer 3 topology