Deployment Guide

16 Dell EMC Networking Layer 3 Leaf-Spine Deployment and Best Practices with OS10 | Version 1.0
Internal Use - Confidential
6 Example 1: Layer 3 with Dell EMC leaf and spine switches
using OSPF
This section covers deploying a leaf-spine environment using OSPF with S4148F-ON and S4248FB-ON
switches at the leaf layer and Z9100-ON switches used at the spine layer. While the S4148F-ON
configuration is shown in this section the configuration provides OSPF configuration examples to build the
layer 3 leaf-spine topology shown in Figure 12. While the S4148F-ON configuration is shown in this section
the configuration details for the S4248FB-ON switches are attached.
Rack 2Rack 1
S4248-Leaf4
Z9100-Spine1 Z9100-Spine2
S4248-Leaf3
VLTi
S4148-Leaf2
S4148-Leaf1
VLTi
Server 2
Server 1
L3 Connection
L2 Connection
ECMP
Eth 1/1/1-1/1/4
Eth 1/1/29-1/1/30
Eth 1/1/1Eth 1/1/1
Po 1
Po 1
Switch uplinks
Eth 1/1/25-1/1/26
IP Address 10.60.1.7/24
Gateway 10.60.1.1
Leaf 3
VLAN 60:
10.60.1.1/24
Leaf 4
VLAN 60:
10.60.1.2/24
IP Address 172.16.1.7/24
Gateway 172.16.1.1
Leaf 1
VLAN 50:
172.16.1.1/24
Leaf 2
VLAN 50:
172.16.1.2/24
Eth 1/1/47-1/1/48
Eth 1/1/1Eth 1/1/1
Eth 1/1/1-1/1/4
Switch uplinks
Eth 1/1/43-1/1/44
Example 1: Layer 3 leaf-spine topology
In Rack 1, VLAN 50 is used and devices in VLAN 50 are assigned IP addresses on the 172.16.1.0/24
network. Because VRRP with VLT is configured on S4148F-Leaf1 and S4148F-Leaf2, Server 1 may specify
the virtual IP address (VIP) assigned to VLAN 50 on both leaf switch, 172.16.1.254, as its default gateway.
Traffic is load balanced across both leaf switches.
Rack 2 is configured in an identical manner, except VLAN 60 is used and devices in VLAN 60 are assigned IP
addresses on the 10.60.1.0/24 network. Server 2 may specify the VLAN 60 VIP address configured on the
leaf switches 10.60.1.254, as its default gateway.