From: virtualization networking deep dive.pdf

I (Charlie Calvert) did not write this. I don’t know where it comes from.

Layer-3 networking, HSRP (Hot Swap Routing Protocol) or
VRRP (Virtual Routing Redundancy Protocol), link aggregation,

pile of gigabit copper ports or a smaller number of 10G
copper or fiber Ethernet ports.

If you have the
budget to deliver multiple 10G links to each virtualization
host, then by all means, go that route

The use of VLANs in a virtualized infrastructure is a must.You can also use the enhanced control afforded by VLANs
to constrain certain VMs to their own specific network, and
in some cases, create airlocked VLANs that can be used in
development environments. There’s

There are three main methods
of delivering shared storage to a virtualization host: iSCSI,
NFS, or Fibre Channel.

If NFS is the choice, then there isn’t much to do on the
host side, as the storage array will be busy handling the
NFS serving, with the virtualization host acting as the client.
There are definitely benefits to using NFS as a VM store,
such as ease of backup and restore. But there are detriments
as well – notably, the inability for some virtualization solutions
to create raw disk mappings on NFS-based storage.

If it’s 10G, then in most cases it’s as simple
as connecting two 10G links to the core switches with
VLAN trunking and link aggregation.

To sum up the basic host configuration: six 1G interfaces
in bonded pairs for front-end, back-end, and storage
links. For a 10G-equipped host, we’ll have just the
pair of 10G links configured in a failover or bonded pair.