| LEGACY | CAMPUS FABRIC |
| Flexible Connectivity | Need to change physical connections and move VLANs | VXLAN overlay provides Layer2, Layer3 extension across campuses without any changes to the underlay network. |
| Loop Avoidance | Need Spanning Tree to mitigate flooding | Layer 2 span is decreased and Optimized Flooding as needed in case of Layer2 extension. |
| Reduced flooding and learning | Flood and Learn mechanism | Control plane based L2 and L3 learning with BUM(Broadcast, Unicast, Multicast) traffic suppression reduces the flood and learn issues associated with data plane learning. |
| Scalability | Network devices needs to scale based on number of endpoints in the campus. | Campus Fabrics can easily scale to accommodate a growing number of devices and users. Eg: In a Campus Fabric, core switches only learn the access layer switches addresses instead of the device endpoint addresses. |
| Security | Every device needs to have a role and ACL associated to it. | Unified policy for Wired and Wireless using Role Based ACL. Same roles on LAN segments can be used in WAN policies. Efficient ACL usage leveraging Group based policy across network. Can define role to role/application/service policy. |
| Segmentation | Limited Micro Segmentation Capability | Can do Macro Segmentation using VRFs and Micro Segmentation using roles. In Micro Segmentation it can do North-South(Role to Application) and East West(Role to Role) Segmentation. |
| Simplified Network Deployment and Management | Too many touch points and haphazard configuration | A Fabric operates as a single entity, simplifying network administration and reducing operational complexity. Standardize your configuration. |
| Consistency | Different solutions for different use cases | A universal EVPN-VXLAN-based architecture across disparate campus and data center deployments enables a seamless end-to-end network for endpoints and applications. |
Networking & Security 