Objective 5.3 – Configure and Manage Layer 2 Bridging

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Knowledge

  • Identify High Availability requirements for Layer 2 Bridging
    • If High Availability is enabled on the Logical Router and the primary NSX Edge virtual machine goes down, the bridge is automatically moved over to the host with the secondary virtual machine. For this seamless migration to happen, the VLAN must have been configured on the host that has the secondary NSX Edge virtual machine.

      Therefore, to enable HA for L2 Bridging, you need to enable HA for the Logical Router to which it is attached.

  • Add a Layer 2 Bridge to an NSX Edge device
    • Log in to the vSphere Web Client.
    • Click Networking & Security and then click NSX Edges.
    • Double-click the NSX Edge to which you are adding the Bridge.
    • Click Manage and then click Bridging.
    • Click the Add icon.
    • Type a name for the bridge.
    • Select the logical switch that you want to create a bridge for.
    • Select the distributed virtual port group that you want to bridge the logical switch to.
    • Click OK.
  • Determine when Layer 2 Bridging would be required for a given NSX implementation
    • You can create an L2 bridge between a logical switch and a VLAN, which enables you to migrate virtual workloads to physical devices with no impact on IP addresses. A logical network can leverage a physical gateway and access existing physical network and security resources by bridging the logical switch broadcast domain to the VLAN broadcast domain.
  • Determine when multiple Layer 2 Bridges are required for a given NSX implementation
    • The L2 bridge runs on the host that has the NSX Edge logical router virtual machine. An L2 bridge instance maps to a single VLAN, but there can be multiple bridge instances. This means that you need multiple L2 Bridges if you need to bridge multiple VLANs into NSX.

Tools

  • NSX Installation and Upgrade Guide
  • NSX Administration Guide
  • NSX Manager
  • vSphere Web Client

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