Toastmaster’s speech 1 – Virtual Networks
Speech contents are below:
Speech – Virtual Networks
1. What is Virtualization?
a. Benefits: Run multiple OS on single server (hardware consolidation – 80% greater utilization), power savings, rack space saving, efficiency in maintenance and deploying patches, HA
b. Savings - > $1500 per server virtualized.
c. Types – Server, Storage (VMFS datastore), Network
2. Software Defined Datacenters – caters to capacity elasticity, on-demand application provisioning, policy based provisioning and automated operations management.
3. Types of Hypervisors
a. Type 1- Bare metal (ESXi, Hyper-v, XenServer)
b. Type 2 – Hypervisor within OS (VMware Workstation, MS VirtualServer)
c. ESXi – 32 MB footprint.
4. Virtual Network Components:
c. Port/Port group – VM Kernel, VM Port group
e. Trunk port
f. Access port
g. Network Interface card team
h. Virtual network adapters – vmxnet adapters 1Gbps – inside guest OS.
5. Virtual Switch functions –
a. VM to VM on same host
b. Vmknic for vMotion, iSCSI/NFS storage access etc
c. VM to VM on different hosts
d. VM to physical host
6. Similarities to a physical switch –
a. L2 switch
b. MAC table
c. Supports VLAN
d. Supports trunking
e. Fixed number of ports (as specified) - 8, 24 … 4088
7. Dissimilarities to a physical switch –
a. vSwitch cannot be connected to vSwitch – so no looping – so no need for STP
b. vSwitch knows the MACs of VMs connected – so no need to learn MACs.
c. vSwitch cannot route traffic from one NIC to another NIC.
d. No telnet service.
8. Port groups –
a. VM Kernel port – traffic from vmknics on host
b. VM Port groups – traffic of VMs
9. Uplinks –
a. Required to connect to physical switch.
b. vSwitch can have multiple uplinks.
c. No uplink can be shared by 2 vSwitches.
d. Max 32 uplinks on host
e. vSwitch without uplink – internal-only vSwitch
10. NIC Team – 2 or more uplinks on a vSwitch. Provides load balancing and failover (Active/passive)
11. VM Port group – multiple vNICs, does not have IP addresses.
12. VLAN – can reduce number of vSwitches and uplinks required. ID 0 – 4094.
13. Switch port connected to uplink using multiple VLANs must be trunk port.
14. Distributed vSwitches – spans hosts, config change on dvPort group will be pushed to all member hosts by vCenter.
15. Conclusion – Virtual networking aids server virtualization initiatives and thus contributes to the benefits incurred from adopting virtualization.
I was only able to cover up to 4.a and then 15 and that itself put me in red @ 6 min+.