13
Dell EMC VxRail Multirack Deployment Guide
3.2
Underlay network design
In this Deployment Guide, a leaf-spine network has already been established as the underlay for the data
center. Figure 10 shows that a single OSPFv2 area has been configured using point-to-point interfaces to
establish router adjacency.
Changing the interface type to point-to-point avoids DR/BDR election process, reducing the time required to
bring up the OSPF adjacency between the leaf switches and spines. In addition, with point-to-point interface
mode, there are no Type 2 link-state advertisements (LSAs). Only type 1 LSAs are needed and this
configuration model keeps the OSPF LSA database at a minimum size.
Note:
For detail instructions on creating a leaf-spine underlay, including considerations and alternative
configurations, see
Dell EMC Networking Layer 3 Leaf-Spine Deployment and Best Practices with OS10EE
.
OSPF Area 0
Leaf 2B
S5248F-ON
Leaf 2A
S5248F-ON
Leaf 1B
S5248F-ON
Leaf 1A
S5248F-ON
Spine 1
Z9264-ON
Spine 2
Z9264-ON
V
L
T
V
L
T
Leaf-spine OSPF IP underlay network diagram
