VDS

Question 1

What kind of traffic can a distributed switch shape?

Answer 1

Inbound and outbound

Question 2

What are some features of VDS’ that are not found in VSS’?

Answer 2

Cisco Nexus 1000v

Load based NIC teaming

Enhanced Security and Monitoring for vMotion Traffic

802.1p tagging (QoS traffic)

LLDP

Netflow

Network IO Control

Port Mirroring

Private VLAN Support

Management Network Rollback and Recovery

Network Health Check

LACP

Question 3

What features does the dvSwitch 5.0 introduce?

Answer 3

Resource Pools in Network IO Control,

Netflow

Port Mirroring

Question 4

What features does dvSwitch 5.1 introduce?

Answer 4

Management Network Rollback/Recovery

Health Check

Enhanced Port Mirroring

LACP

Question 5

What features does dvSwitch 5.5 introduce?

Answer 5

Traffic filtering/marking

Enhanced LACP

Question 6

What features does dvSwitch 4.1 introduce?

Answer 6

Load-based NIC teaming

Network I/O Control

Question 7

What are the three port binding modes?

Answer 7

Static Binding

Dynamic Binding

Ephemeral Binding

Question 8

What is another name for a VMKernel Adapter

Answer 8

Virtual Adapter

Question 9

What are requirements for beacon probing

Answer 9

Should not be used with route based on IP hash and should be used with 3 or more adapters

Question 10

When should a notify switch option of no be used?

Answer 10

When connected virtual machines are using NLB in unicast mode

Question 11

Can peak bandwidth be smaller than the average bandwidth?

Answer 11

No

Question 12

What are the three configuration modes for virtual switch tagging?

Answer 12

External Switch Tagging (EST) - physical switch does all tagging, nics are connected to access ports

Virtual Switch Tagging (VST) - the vswitch does all the tagging, NICs are connected to trunk ports on physical switch

Virtual Guest Tagging (VGT) - driver enables guest to perform tagging, if using on a VSS, vlan 4095 must be used

Question 13

What are the requirements for enabling jumbo frames on a guest VM

Answer 13

• The VMXNET 2 or VMXNET 3 network adapter must be connected to a virtual machine port group on a virtual switch with jumbo frames enabled.

■ All physical switches and other devices connected to the virtual machine must support jumbo frames. Remember that jumbo frames must be supported end to end. ■ The guest OS must also be configured to support jumbo frames. In Windows guests, this is accomplished by changing the MTU setting in the network adapter properties, as shown in Figure 4.18.