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Cisco Nexus Fabric Manager Configuration Guide, Release 1.x

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Book Title

Cisco Nexus Fabric Manager Configuration Guide, Release 1.x

Chapter Title

Tenant VRF Management

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Updated:
June 19, 2017

Chapter: Tenant VRF Management

Tenant VRF Management

Tenant VRFs can be assigned to gateways. Routing is automatically enabled among broadcast domains associated to gateways that share the same tenant VRF.


Note

Tenant VRFs can be created and assigned to broadcast domain gateways and any layer 3 host-facing or border port channels and interfaces. Routing is automatically available among broadcast domain gateways within a given VRF as each leaf switch participates in each broadcast domain. As such, every leaf switch is directly connected to every VRF and the layer 3 networks within them. This includes the number of VRF members. Clicking the members link in the tile opens up the MEMBERS tab to display the VRF member tiles. The number displayed in the VRF tile can be larger than the number of member tiles because logical interfaces (port channels and gateways) are backed by physical interfaces (physical port channels and SVIs) when deployed. The Cisco Nexus Fabric Manager hides these physical interfaces and shows only the aggregated (logical) interface. These objects exist as read-only entities and must be accounted for in the total VRF members.

This chapter has the following sections:

Creating a VRF

This section explains how to create a VRF.

    Step 1   From the Navigation drop-down list, choose VRFs.
    Step 2   From the Settings drop-down list, choose Create new VRF. The ADD VRF dialog box appears.
    Note    To view the ADVANCED tab, press and hold Ctrl-Shift-A. To close the ADVANCED tab, press Ctrl-Shift-A again at any time. If you press it while the editor is opened, the ADVANCED tab won't go away immediately. It will only disappear for the next time the editor is opened (and the current changes will still be pushed).
    Step 3   Enter the appropriate values in the fields as listed in the ADD VRF Dialog Box Fields table below then continue to step 4.
    Table 1 ADD VRF Dialog Box Fields

    Field

    Description

    Name

    Enter a name for the VRF.

    Description

    Enter a description for the VRF.

    State

    Choose enable/disable to change the state of the VRF.

    vPC L3 peering

    vPC L3 peering

    Enable/disable L3 routing over vPC peer links for this VRF.

    Routing VLAN ID

    Set the VLAN ID to use for creating SVIs to establish point-to-point routed links between vPC switch pairs in this VRF. If no VLAN ID is provided, an available VLAN ID is automatically chosen from the switchpool wide vPC L3 peering VLANs pool. This pool can be configured from the switchpool settings General tab.

    IP address pool

    Set the IP address pool for allocating IP addresses to the routed point-to-point links between vPC switch pairs in this VRF. The pool must be large enough to assign addresses for all vPC switch pair links. The routing prefix length below defines the per-link subnet size requirement. For example, with a routing prefix length of 30 and 5 vPC switch pairs, the pool must be at least /27 or larger.

    Routing prefix

    The routing prefix length defines the subnet size to allocate for each point-to-point link between vPC switch pairs. This length should typically be 30 in order to provide one IP address for each SVI endpoint of a link.

    ADVANCED tab

    Layer 3 VNI

    Set the administrative Layer 3 VNI for VXLAN routing.
    Step 4   Click SAVE CHANGES.

    Editing a VRF

    This section explains how to edit a VRF.

    Before You Begin

    At least one VRF has been added.

      Step 1   From the Navigation drop-down list, choose VRFs. The VRF tiles appear.
      Step 2   Click in the whitespace of the VRF tile you want to edit. A VRF-specific window appears with a summary pane on the right that contains the EDIT option.
      Step 3   Click EDIT. The EDIT VRF dialog box appears.
      Step 4   Enter the appropriate values in the fields listed in the Edit VRF Dialog Box Fields table below then continue to step 6.
      Table 2 EDIT VRF Dialog Box Fields

      Field

      Description

      Name

      Enter a name for the VRF.

      Description

      Enter a description for the VRF.

      State

      Choose enable/disable to change the state of the VRF.

      Step 5   Click SAVE CHANGES.

      Deleting a VRF

      Before You Begin

      At least one VRF has been added.

        Step 1   From the Navigation drop-down list, choose VRFs. The VRF tiles appear.
        Step 2   Click the name in the VRF tile you want to delete. A VRF-specific window appears with a summary pane on the right that contains the DELETE option.
        Step 3   Click DELETE. The DELETE VRF dialog box appears.
        Step 4   Click DELETE.

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