Cisco on VXLAN For Logically Isolating Virtual Subnets At Scale

Scalability issues have overcome what VLANs were designed to provide.  In multi-tenant cloud computing environments with each tenant having many applications many of which require their own logical network segments, the 4k limit of VLANs does not scale.  And as cloud networks grow beyond data centers, logically isolated subnets have to be expanded to include geographic scale. Challenges include application mobility over very large resource pools that cover multiple sites, while ensuring the same consistency and logical network policy constraints.  Enter VXLAN, jointly announced last summer by industry heavy-weights Cisco Systems, VMware, Red Hat, Arista and others.  Han Yang Senior Product Manager at Cisco Systems joins me to discuss VXLAN in virtual networking and the challenge to logically isolate virtual subnets in highly scalable, multi-tenant data centers.