Setting Up a of Data Center (Spine and Leaf) Underlay Network

To set an underlay network of Data Center (Spine and Leaf) for the AOS-CX switches, complete the following workflow.

Step 1: Configuring the Network Type

To configure an underlay network for the AOS-CX switch, complete the following steps:

  1. In the Aruba Central app, complete the following steps:
    • To select a group in the filter:
      1. Set the filter to a group.

        The dashboard context for the group is displayed.
      2. Under Manage, click Devices > switches.
      3. To view the AOS-CX switch configuration dashboard, click the Config icon.
  2. Click Routing > Underlay Networks.
  1. In the Networks table, click the + icon.

    The Guided Setup for Underlay Network page is displayed.

  2. Enter the Network Name.

  3. Select the Data Center(Spine and Leaf)) checkbox under What type of Network to configure.

  4. Click Next to display the Structure section.

Step 2: Setting the Structure of the Underlay Network

To assign WAN Wide Area Network. WAN is a telecommunications network or computer network that extends over a large geographical distance. gateways to the spine or border switches, complete the following steps.

  1. In the Structure section, select the type of switch to be connected to the WAN gateway.

    1. Spine switches—Connects the WAN gateway to the spine switches.

    2. Border switches—Connects the WAN gateway to the border switches.

  2. To display the Device Assignment section, click Next.

Step 3: Assigning Devices to the Network

This section displays the device persona suggestions for the switches present in the network.

The Device assignment section consists of three subsections of Spine, Border, and Leaf. The switches table displays the Name, Serial, MAC Media Access Control. A MAC address is a unique identifier assigned to network interfaces for communications on a network. Address, Model, and Discovered Network Personas across all subsections of the Device assignment page.

  • Spine—Select the switches to use as spine switches in the underlay network and click Next.

  • Border—Select the switches to use as border switches (uplink) in the underlay network and click Next.

  • Leaf—Select the switches to use as leaf switches in the underlay network and click Next to display Configuring your underlay network page.

Step 4: Configuring the Underlay Network

The Configuring your underlay network page displays various parameters to configure underlay network. After providing the required information for the parameters.

Click Next to open the Summary Page.

The following table describes the parameters in the Configuring your underlay network table.

Table 1: Configuring your Underlay Network Parameters.



Interface IPv4 subnet Subnet is the logical division of an IP network. pool

Enter the ROP interface IPv4 subnet pool address for the underlay network.

Loopback IPv4 subnet pool

Enter the loopback IPv4 subnet pool address for the underlay network.

MTU size (bytes)

Enter the MTU Maximum Transmission Unit. MTU is the largest size packet or frame specified in octets (eight-bit bytes) that can be sent in networks such as the Internet. size within the range of 1–9198 bytes.

VSX-Pair Transit VLAN

Enter the VSX Virtual Switching Extension. VSX is a virtualization technology for aggregation/core switches running the AOS-CX operating system. This solution lets the switches present as one virtualized switch in critical areas.-pair transit VLAN Virtual Local Area Network. In computer networking, a single Layer 2 network may be partitioned to create multiple distinct broadcast domains, which are mutually isolated so that packets can only pass between them through one or more routers; such a domain is referred to as a Virtual Local Area Network, Virtual LAN, or VLAN. within the range of 1–4094.

Use out-of-band management port for VSX keepalive Signal sent at periodic intervals from one device to another to verify that the link between the two devices is working. If no reply is received, data will be sent by a different path until the link is restored. A keepalive can also be used to indicate that the connection should be preserved so that the receiving device does not consider it timed out and drop it.

The toggle remains disabled by default to use dedicated ports for the VSX keepalive.

Enable the toggle to use out-of-band ports for VSX keepalive

Use NTP Network Time Protocol. NTP is a protocol for synchronizing the clocks of computers over a network. servers

Enable the toggle to enter the NTP server address for the underlay network. You can add more than one address for the server by clicking the add (+) icon.

Clicking the delete icon deletes the NTP server address.

Use DNS Domain Name System. A DNS server functions as a phone book for the intranet and Internet users. It converts human-readable computer host names into IP addresses and IP addresses into host names. It stores several records for a domain name such as an address 'A' record, name server (NS), and mail exchanger (MX) records. The Address 'A' record is the most important record that is stored in a DNS server, because it provides the required IP address for a network peripheral or element. servers

Enable the toggle to enter the DNS server address for the underlay network. You can add more than one address for the server by clicking the add (+) icon.

Clicking the delete icon deletes the DNS server address.

Step 5: Viewing the Summary Page

This section displays all the parameter that you have configured under the Details and Device Management sections.

Click Finish to complete the underlay network configuration.

To delete an underlay network, click the delete icon in the tunnel row.