Infrastructure Virtualization - 6

a CCNA Cloud CLDFND 210-451 summary

  1. Following are applicable to virtual switching in general,

    virtual switch is a software program that enables one VM to communicate with another. Also establish connections between virtual and physical networks. image.png

    • Responsible for virtual machine Layer 2 connectivity
    • Can be configured per host, without use of a VM manager
    • Supports LACP(Link aggregation control protocol)
    • Can belong to more than one host
    • Allow live migration of VM
  2. Differences between VMware vNetwork Standard Switch and VMware vNetwork Distributed Switch (vDS or distributed virtual switch i.e DVS)?

    image.png

    • VMware vCenter requirement
    • Uplink Port Groups
    • Resides in more than one host
    • Supports LACP(Link aggregation control protocol)
  3. Following virtual devices can be considered distributed virtual switches,

    • Open vSwitch
    • VMware vDS
    • Cisco Nexus 1000V
  4. Facts about Cisco Nexus 1000V Switch for VMware vSphere

    • Cisco Nexus 1000V can coexist with other virtual switches in the same host
    • The communication between VSM (Virtual Supervisor Module) and VEM (Virtual Ethernet Module) requires Layer 3 connectivity
    • The VEM runs inside the VMware vSphere kernel
    • The communication between active and standby VSMs requires Layer 2 connectivity
  5. Correct associations of Cisco Nexus 1000V interfaces and VMware vSphere interfaces,

    • vEthernet and vmk
    • Ethernet and vmnic (vm network interface controller)
  6. Cisco Nexus 1000V features

    image.png

    • vTracker
    • PortChannel
    • Private VLAN
    • TrustSec
  7. Hypervisors that support Cisco Nexus 1000V,

    • VMware vSphere
    • KVM
    • Microsoft Hyper-V for Windows 2012
  8. Protocols used in VXLAN (Virtual eXtensible LANs) encapsulation header,

    • UDP
    • IP
  9. Advantages of VXLANs over VLANs,

    • Avoid MAC address table overflow in physical switches
    • Offers easier provisioning of broadcast domains for virtual machines
    • Provides more segment (are assigned to the range 4096 to 16,777,215)

      image.png image.png

  10. Improvements of Cisco Nexus 1000V Enhanced VXLAN over standard VXLAN deployments,

    • Does not require IP multicast
    • Eliminates flooding