Deployment Guide

19 VCF on VxRail Multirack Deployment using BGP EVPN

4.2 Underlay network connections

Figure 14 shows the wiring configuration for the six switches that include the leaf-spine network. The solid

colored lines are 100 GbE links, and the light blue dashed lines are two QSFP28-DD 200 GbE cable pairs

that are used for the VLT interconnect (VLTi). The use of QSFP28-DD offers a 400 GbE VLTi to handle any

potential traffic increases resulting from failed interconnects to the spine layers. As a rule, it is suggested to

maintain at minimum a 1:1 ratio between available bandwidth to the spine and bandwidth for the VLTi.

Rack 2

Stack ID

Reset

Stack ID

Reset

Stack ID

S5248F-ON

sfo01-leaf01a

S5248F-ON

sfo01-leaf01b

S5248F-ON

sfo01-leaf02a

S5248F-ON

sfo01-leaf02b

Z9264F-ON

sfo01-spine01

Z9264F-ON

sfo01-spine02

Rack 1

Physical switch topology

Note: All switch configuration commands are provided in the file attachments. See Section 1.7 for instructions

on accessing the attachments.