Overlay

Selecting Dashboards → Overlay displays important information about Virtual Link Extensions  within the Fabric devices and/or between individual devices within the Fabric, within a topology map or multiple topology maps depending on the number and fabrics and the connectivity between fabrics.


Overlay Fabric (or Network) – This is a virtual fabric with its own tenant, isolated from other overlay fabrics.  Within the Overlay, there are isolated administrative capabilities such as building vlans, adding ports, etc.

 

Overlay Service – This is a virtual service that runs on a physical network, for example Virtual Link Extension (VLE).



Note: Selecting Dashboards → Overlay displays information about a Fabric assuming a fabric was created and added. For more information about creating and adding a Fabric please refer to the ZTP - Zero Touch Provisioning section in this manual.



A Virtual Link Extension (VLE) is a logical link or tunnel.  A VLE connect ports within a switch, or from a port on one switch to a port on a switch in another cluster.


The VLE feature requires that a Layer-3 fabric must be deployed from an UNUM Layer-3 Playbook.  If you have an existing Layer-3 fabric (i.e. built with the CLI or built prior to UNUM 5.0.0) where you wish to use VLE, the VXLAN tunnels will have to be built and configured.  Please contact Pluribus Networks technical support.

 

The workflow in building a VLE involves four basic steps:

 


Configuration Note: Whenever possible, physically cabling the devices to be connected to their respective ports before creating the VLE simplifies the process.


 

  1. Use one of two methods to create a Virtual Link Extension:
    1. From the Overlay ring graphic in the dashboard hold the Control or Command key on your keyboard and click on two switches represented by colored arcs in the ring. The VLE Connection dashboard opens and you enter the desired configuration parameters.
    2. Use  (Manager → Services → VLE → Manage VLE) to create a VLE. To add a VLE click Create Virtual Link Extension. The VLE Connection dashboard opens and you enter the desired configuration parameters. In either case:
    • Provide a meaningful name, such as Leaf1p30-L3p30, where the VLE will connect Leaf1, Port 30 to Leaf3, Port30.
    • When creating the VLE, each requires a unique vlan and vxlan identifier, e.g. VLAN 30, VXLAN 10030.
  1. Verify the port state is up via the Port Status dashboard (Manager → Layer 1 → PHYSICAL PORTS → Port Status).
  2. Complete the connection between devices by cabling both ends of the VLE to their respective devices (unless this was already done).
  3. Trigger a VLE discovery from the VLE Overlay (Overlay → Overlay details → Gear button → Trigger VLE discovery).

 

At this point the VLE inter-link connection in the ring diagram updates reflecting the new VLE connection. Changes in the inter-link visual indicators from Green to Red, or vice versa, indicate whether ports are "up" or "down".


In either case, the VLE is created and displayed in the dashboard. Bringing the ports "up" and ensuring the Tunnel is "up" changes the VLE status to Up.

 

If the inter-link connection stays Red, please verify that the port(s) state is up and the respective devices are connected and active.



Note: Currently, only Virtual Link Extension (VLE) is supported which is configured and monitored as described below.



UNUM provides access to specific feature help documentation via the Help Button  icon.


Depending on the configuration state of your UNUM instance the Overlay may display VLE mappings if a Fabric and Seed Switch have previously been configured.

In the case where VLE's are not configured, the following dashboard is displayed. Fabric and switch names are displayed.

Overlay Dashboard - No VLEs Configured

For additional information about managing Virtual Link Extensions please refer to Manager  → Services  → VLE - Manage VLE.


In general, there are two basic steps for creating a VLE:


  1. Create an Underlay. Create the underlay manually or use an L3 Playbook. See relevant Zero Touch Provisioning sections for more information.
  2. Create the VLE. Pre-requisites include the creation of a VLAN, VXLAN and Tunnel. See relevant Manager sections for more information.


In the case where VLE's are already configured, the following dashboard is displayed.

Fabric and switch names are displayed along with data indicating the number of VLE Configured, VLE Up and VLE Down.

The colors Blue and Green denote if the switch is configured in a cluster configuration or configured as stand-alone.

  • Blue is a non-clustered switch.
  • Green indicates the switch is configured in a cluster configuration.

The inter-link connection colors denote VLE status.

  • Red  indicates all VLE's are down.
  • Green  indicates all VLE's are up.
  • Yellow  indicates a mix of Up/Down connections.


Overlay Dashboard - VLE Configured

As shown in the example below, clicking on VLE Configured, VLE Up and VLE Down updates the dashboard with specific information respectively (figure one, two and three).

Rolling over and clicking on individual links provides granular data on the Virtual Link Extension between the connected switches (figure four).

Rolling over a VLE connection provides additional details by VLE name and Port information (figure four).



Overlay Dashboard - VLE Dashboard Display Options


Clicking on a VLE connection displays further information about the connection by VLE Name along with Port and Tunnel stats.



Overlay Dashboard - VLE Connection Drilldown


The Port Stats widget displays bit and packet information along with visual indicators providing information about VLE  traffic in Red, Yellow and Green.


For Port Stats the indicated percentage is percentage of bandwidth or Link utilization percentage.


Indicator





Green

=

0%

<

70%

Yellow

>=

70%

<

90%

Red

>=

90%

<=

100%


The Tunnel Stats widget works in a similar way. However, the bandwidth of a tunnel is not determined.


The widget displays information about errors and drops using visual indicators in Red, Yellow, Green and Orange.


Indicator





Green




No errors and no congestion.

Orange




Error condition.

Yellow




Congestion only.

Red




Error and congestion.


The following example illustrates how the various widgets and visual color indicators work together from the Fabric Health and VLE dashboards:



Overlay and Fabric Dashboard Widgets


Clicking on Tunnel Stats in the VLE connection data drilldown opens an Insight Analytics dashboard to revel traffic information running over the connection.


Note: The information shown below is for illustrative purposes only and may not reflect actual tunnel traffic over VLE.



Overlay Dashboard - VLE Connection Insight Analytics


VLE Dashboard


The dashboard displays a list of existing VLE entries by VLE Name.


Parameters include:


  • Switch 1 - Port 1


  • Switch 2 - Port 2


  • Tunnel 1 - Port 1 - State -Vlan -Vxlan


  • Tunnel 2 - Port 2 - State -Vlan - Vxlan


  • Status


You sort the list of entries in the dashboard using the up / down  arrows above each of the columns to sort the information as needed.




Overlay Dashboard - VLE Connection Details

Interactively Manage VLE via the Dashboard


As shown in the following example, you click on a switch (LEAF113) which highlights. While holding the Control or Command key on your keyboard select a second switch (LEAF133). The VLE Connection dashboard opens and you enter the desired configuration parameters.


Click Submit to continue or Cancel to return to the previous screen without making any changes.



Overlay Dashboard - Interactive VLE Manage


To delete or edit a VLE entry use Delete or Edit by selecting the Cog  icon.


A Manage VLE dashboard provides a list of configured Virtual Link Extension (VLE). You edit or delete VLE entries from this dashboard.


The dashboard displays a list of existing VLE entries.


Additional parameters include: Name, Node 1, Node 2, Node 1 Port, Node 2 Port, Status and Tracking.


You sort the list of entries in the dashboard using the up / down  arrows above each of the columns to sort the information as needed.



Fabric Manager Services Manage VLE Fabric Dashboard


To delete a VLE entry use Delete by selecting the Cog  icon. A confirmation message requires an acknowledgment to continue deletion.



Fabric Manager Services Manage VLE Delete Entry


Click OK to continue or Cancel to return to the previous screen without making any changes.


To modify a VLE entry use Edit by selecting the Cog  icon to make changes to the VLE configuration which include: 


  • tracking – (checkbox) - enable/disable tracking between VLE ports




Manage Services Manage VLE - Modify VLE


Click Save to continue or Cancel to return to the previous screen without saving any changes.


Select the desired switch from the fabric and the dashboard updates automatically with VLE switch settings by Name.


Additional parameters include: Node 1, Node 2, Node 1 Port, Node 2 Port, Status and Tracking.


You sort the list of entries in the dashboard using the up / down  arrows above each of the columns to sort the information as needed.





Fabric Manager Services Manage VLE Switch Dashboard


To obtain detailed information about a VLE select an entry in the dashboard.


A Details pane opens displaying the configuration information of the VLE.


Scroll through the list, as needed, and click X to return to the dashboard.



Fabric Manager Services Manage VLE Switch Details


To delete a VLE entry use Delete by selecting the Cog  icon. A confirmation message requires an acknowledgment to continue deletion.



Fabric Manager Services Manage VLE Delete Entry


Click OK to continue or Cancel to return to the previous screen without making any changes.


To modify a VLE entry use Edit by selecting the Cog  icon to make changes to the VLE configuration which include: 


  • tracking – (checkbox) - enable/disable tracking between VLE ports




Manage Services Manage VLE - Modify VLE


Click Save to continue or Cancel to return to the previous screen without saving any changes.


Create a Virtual Link Extension


VLEs are added by selecting Create Virtual Link Extension.


Select a Switch. To add a VLE click Create Virtual Link Extension.





Fabric Manager Services Manage VLE - Create Virtual Link Extension Tracking



Enter the configuration parameters which include:


  • Name – (required) - VLE name
  • Node 1 (required) - VLE node 1
  • Node 2 (required) - VLE node 2
  • Port 1 (required) - node-1 port of VLE
  • Port 2 (required) - node-2 port of VLE
  • VLAN – (required) VLAN number
  • VXLAN – (required) - VXLAN number


Click the  icon to add the VLE. Repeat the process to add more VLE entries.


 Submit to continue or Cancel to return to the previous screen without saving any changes.


The VLE is added to the VLE Dashboard.



Fabric Manager Services Manage VLE - VLE Added to Dashboard



The new VLE appears in the dashboard. If the tunnel and selected ports are "up" the Status will appear as up. Otherwise the Status shows down.


In this event ensure the ports are physically connected to the switch and the tunnel is functioning. When these conditions are met the dashboard updates accordingly.



Fabric Manager Services Manage VLE - VLE Added to Dashboard - Status Up



Select Dashboards → Overlay to review the added VLE.



Overlay Dashboard - VLE Added to Dashboard - Status Up


When changes are made in VLE configuration use the Cog  icon and select Trigger VLE Discovery in the Overlay Details panel to update the VLE dashboard with the latest VLE configuration.


A "discovering" message appears.



Overlay Dashboard - VLE Discovering