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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

UFD vs. iBGP at the leaf layer

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 > UFD vs. iBGP at the leaf layer

UFD vs. iBGP at the leaf layer

  • Some leaf and spine implementations use iBGP between leaf switches, instead of UFD. If UFD is not used, it is possible, due to hashing, for packets to enter a leaf switch without functioning uplinks. If iBGP is enabled between the leaf switches, it is possible for them to route packets to each other, provided there are valid routes. The examples presented in this document use UFD because it reduces network and configuration complexity and simplifies path determination.


    Figure 8.            Using iBGP between leaf switches vs UFD on leaf switches provides more path options at the cost of greater network and configuration complexity