Geneve

In the Ultra Transcenders books

2V0-13.25

Each book explains Geneve in context, with comparison tables and the common traps.

Terms in this definition

• NSX

  Software that handles networking and security across VCF, covering firewalling, load balancing, NAT, VPCs, overlay segments and Tier-0/1 gateways.

• FORMAT

  A DAX function that turns a value into text according to a format string, for instance "MMMM" to show a month's name. Since the output is text, numeric operations can't use it, and dynamic format strings were introduced to get around that.

• TEP

  Short for tunnel endpoint: the interface on an NSX Edge node or ESX host where Geneve overlay tunnels begin and end. Addresses can be static, from DHCP or from an IP pool.

• VLAN

  Layer 2 broadcast domain tagged using 802.1Q. In VCF they carry TEP, vSAN, vMotion and management traffic, and NSX can back segments with them.

• MTU

  Biggest frame an interface can carry. The physical fabric needs at least 1600 bytes for NSX overlay traffic, with 1700 recommended and 9000 preferred where jumbo frames run end to end.

• VMware Cloud Foundation

  Broadcom's platform for private cloud. It unifies management of NSX, vSAN, vSphere, VCF Automation and VCF Operations as one fleet; VVF, by contrast, lacks automation and cloud management.

Related terms

• RTEP

  Remote tunnel endpoint. VCF places this NSX Edge interface on its own VLAN, kept apart from the one used by edge overlay TEPs, and uses it to tunnel traffic with Geneve from one NSX Federation location to another; every Local Manager has an IP pool that supplies its addresses.

• VPC

  A separate, isolated IP address space in Flow Virtual Networking. It has its own overlay subnets, carried between AHV hosts in Geneve tunnels.