Home > Networking Solutions > Enterprise/Data Center Networking Solutions > Enterprise SONiC Networking Solutions > Guides > Dell Enterprise SONiC Deployment for VxRail > Fabric planning
Several items must be planned before the environment is deployed, including hostnames, management IP addresses, loopback devices, virtual networks, and network services such as DNS and NTP. The single-rack and multirack deployment leverage the same settings. Notes are added that apply to single rack implementation.
To start the infrastructure configuration process, determine the switch hostname configuration structure. This deployment uses Leaf1A, Leaf1B, Leaf2A, Leaf2B, Spine1, and Spine2 as needed.
The switch hostnames should be specific and descriptive. Dell Technologies recommends starting with each switch’s role in the fabric, as shown in the following table:
S5248F Leaf1A | S5248F Leaf1B | S5248F Leaf2A | S5248F Leaf2B | Z9264 Spine1 | Z9264 Spine2 | |
Hostname | Leaf1A | Leaf1B | Leaf2A | Leaf2B | Spine1 | Spine2 |
Apply the hostnames in the table on the respective switches.
Each switch in the fabric needs an out of band (OOB) management IP address. This interface is used for firmware switch upgrades and overall management access. The switches can provide console or SSH access. Assign IP addresses according to your network requirements.
Setting | S5248F Leaf1A | S5248F Leaf1B | S5248F Leaf2A | S5248F Leaf2B | Z9264 Spine1 | Z9264 Spine2 | External network |
Address | 100.67.xx.y1 | 100.67.xx.y2 | 100.67.xx.y3 | 100.67.xx.y4 | 100.67.xx.y5 | 100.67.xx.y6 | 100.67.xx.y7/.y8 |
The fabric is based on BGP EVPN VXLAN. The following table provides the Autonomous System Number (ASN) to be configured for each switch leaf pair, spine, and border router devices.
Setting | S5248F Leaf1A | S5248F Leaf1B | S5248F Leaf2A | S5248F Leaf2B | Z9264 Spine1 | Z9264 Spine2 | External network |
ASN | 65101 | 65101 | 65102 | 65102 | 65100 | 65100 | 65011 |
The loopback 0 configuration is used as the router ID parameter, as required by the routing protocol BGP. This parameter is one of many that are used by BGP to establish connectivity between the different routers participating in the routing protocol.
Setting | S5248F Leaf1A | S5248F Leaf1B | S5248F Leaf2A | S5248F Leaf2B | Z9264 Spine1 | Z9264 Spine2 | External network |
Rtr_ID (Lo0) | 10.0.2.1/32 | 10.0.2.2/32 | 10.0.2.3/32 | 10.0.2.4/32 | 1.1.1.1/32 | 1.1.1.2/32 | 10.0.2.5, 10.0.2.6/32 |
Note: For Single Leaf-Pair single rack, the MC-LAG uses the IP assigned to VLAN 1000.
The loopback 1 configuration is be used as the VXLAN tunnel end-point IP interfaces (VTEP). Each pair of devices has an identical NVE configured. The tunnels are established between all the leaf pairs. The following table shows the NVEs to be applied during the fabric deployment phase.
S5248F Leaf1A | S5248F Leaf1B | S5248F Leaf2A | S5248F Leaf2B | Z9264 Spine1/2 | External network | |
NVE (Lo1) | 10.222.222.1/32 | 10.222.222.1/32 | 10.222.222.2/32 | 10.222.222.2/32 | N/A | N/A |
Several virtual networks are needed on the leaf pairs to bring the VxRail cluster online. For this deployment, five different virtual networks are created:
For the initial deployment of the VxRail cluster, configure the default network (VLAN 1). For default and tenant VRF VNI and forwarding, VLAN 2001 is created for L3 VNI routing on the infrastructure and stretched across the different racks.
Setting | Virtual Networks |
S5248F Leaf1A | 1811,1812,1813,1814,3939,2001,1 |
S5248F Leaf1B | 1811,1812,1813,1814,3939,2001,1 |
S5248F Leaf2A | 1811,1812,1813,1814,3939,2001,1 |
S5248F Leaf2B | 1811,1812,1813,1814,3939,2001,1 |
Z9264 Spine1 | N/A |
Z9264 Spine2 | N/A |
These virtual networks are configured only on the leaf switches whereas the spine switches route these networks.
Setting | S5248F Leaf1A | S5248F Leaf1B | S5248F Leaf2A | S5248F Leaf2B | Z9264 Spine1 | Z9264 Spine2 |
1811 | 172.18.11.254/24 | 172.18.11.254/24 | 172.18.11.254/24 | 172.18.11.254/24 | N/A | N/A |
1812 | N/A | N/A | N/A | N/A | N/A | N/A |
1813 | N/A | N/A | N/A | N/A | N/A | N/A |
1814 | 172.18.14.254/24 | 172.18.14.254/24 | 172.18.14.254/24 | 172.18.14.254/24 | N/A | N/A |
S5248F Leaf1A | S5248F Leaf1B | S5248F Leaf2A | S5248F Leaf2B | |
VTEP1 | 10.222.222.1 | 10.222.222.1 |
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VTEP2 |
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| 10.222.222.2 | 10.222.222.2 |
L2 and L3 uplinks are references used for DNS, NTP services for each uplink setup. L2 port channel uplink examples are used for single leaf-pair to DNS and NTP services. L3 point-to-point uplink examples are used for the two leaf-pair deployment to DNS/NTP services.
Setting | DNS | NTP | VLAN | Leaf1A | Leaf1B |
L2 uplinks | 172.18.11.50 | 172.18.11.50 | 1811 | PortChannel 100 | PortChannel 100 |
L3 uplinks | 172.19.11.50 | 172.19.11.50 | 1911 | 192.168.1.1/31 192.168.2.1/31 | 192.168.1.3/31 192.168.2.3/31 |
Note: VLAN 1000 is configured for MC-LAG Peer-llink purposes when using L2 uplink and Single Leaf-Pair.