Hello,
ill try to answer in the Order of the Questions.
1). What is the maximum vSphere standard switch can be created on a host ?
Ans : you can create 127 virtual switches on a single ESXi . But again it depends on Number of port groups your creating , On one ESXi Host is going to be 4096 Max. So we can have multiple vSwitches but the total number of ports that add up can only be 4096.
Source : vSphere Documentation Center
2). Configuration maximum for = Total virtual network switch ports per host (VDS and VSS ports) - 4096
My understanding on the question no 2 is maximum port on a host is 4096 and per vSwitch we can create 4088.
I am adding two virtual switch on a host and each switch with 4088 port. My question is maximum port per host is 4096 so how i am able to add 2 switch with 4088.
Ans : you Cannot add two vSwitches with 4088, Only one can be created since you can have a Max of only 4096 ports on ESXi, Irrelevant of number of switches. so if your having one switch with 4088 ports, the second vSS cannot be created with more than 8 ports.
3) what is the actual purpose of overhead or reserved port for virutual switch ? still confused after red the KB 1008040.
Ans : I don't understand the question, Since the KB clearly states
To account for overheads such as physical NIC ports (uplinks), CDP traffic, and network discovery, ESX 3.x, ESX/ESXi3.5.x, and ESX/ESXi 4.x allocate and reserve an additional eight ports per virtual switch beyond what is available for virtual machine use.
Thanks,
Avinash
