Deployment Guide

3 Leaf-Spine Deployment and Best Practices Guide | Version 1.0
Table of contents
Revisions............................................................................................................................................................................. 2
1 Introduction ................................................................................................................................................................... 6
1.1 Typographical Conventions ................................................................................................................................ 7
2 Hardware overview ....................................................................................................................................................... 8
2.1 Dell EMC Networking S3048-ON ....................................................................................................................... 8
2.2 Dell EMC Networking S4048-ON ....................................................................................................................... 8
2.3 Dell EMC Networking S6010-ON ....................................................................................................................... 8
2.4 Dell EMC Networking Z9100-ON ........................................................................................................................ 9
2.5 Cisco Nexus 5600 and 7000 series switches ..................................................................................................... 9
3 Leaf-spine overview ................................................................................................................................................... 10
3.1 Layer 3 leaf-spine topology .............................................................................................................................. 10
3.2 Layer 2 leaf-spine topology .............................................................................................................................. 11
3.3 Design considerations ...................................................................................................................................... 11
4 Management network ................................................................................................................................................. 12
5 Protocols used in the leaf-spine examples ................................................................................................................. 13
5.1 VLT ................................................................................................................................................................... 13
5.2 UFD .................................................................................................................................................................. 14
5.3 RSTP ................................................................................................................................................................ 14
5.4 Routing protocols .............................................................................................................................................. 14
5.4.1 BGP .................................................................................................................................................................. 14
5.4.2 OSPF ................................................................................................................................................................ 15
5.4.3 IS-IS .................................................................................................................................................................. 15
5.5 BFD ................................................................................................................................................................... 15
5.6 ECMP ............................................................................................................................................................... 16
6 Layer 3 configuration planning ................................................................................................................................... 17
6.1 BGP ASN configuration .................................................................................................................................... 17
6.2 IP addressing .................................................................................................................................................... 17
6.2.1 Loopback addresses ........................................................................................................................................ 17
6.2.2 Point-to-point addresses ................................................................................................................................... 18
7 Example 1: Layer 3 with Dell EMC leaf and spine switches ...................................................................................... 20
7.1 S4048-ON leaf switch configuration ................................................................................................................. 21
7.1.1 S4048-ON BGP configuration .......................................................................................................................... 25