Cisco APIC Layer 3 Networking Configuration Guide, Release 6.2(x)

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Cisco APIC Layer 3 Networking Configuration Guide, Release 6.2(x)

Configure Microsoft NLB in unicast mode using the GUI

Updated: April 17, 2026

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Configures Microsoft NLB to flood all ports in the bridge domain using the GUI. This procedure requires the Microsoft NLB cluster VIP and MAC address.

This task configures Microsoft NLB to flood all of the ports in the bridge domain.

Before you begin

Have the following information available before proceeding with these procedures:

  • Microsoft NLB cluster VIP

  • Microsoft NLB cluster MAC address

Procedure

  1. In the Navigation pane, choose Tenant > tenant_name > Application Profiles > application_profile_name > Application EPGs > application_EPG_name > Subnets .

  2. Right-click Subnets and select Create EPG Subnet .

  3. In the Create EPG Subnet dialog box, fill in the following fields:

    1. In the Default Gateway IP field, enter the Microsoft NLB cluster VIP.

      For example, 192.0.2.1/32 .

    2. In the Scope area, for shared services, check Shared between VRFs .

      Uncheck Private to VRF , if it is selected.

    3. Under Subnet Control , check the No Default SVI Gateway check box.
    4. In the Type Behind Subnet area, click EpNlb .

      The Mode field appears.

    5. From the Mode drop-down list, choose NLB in unicast mode .

      The MAC Address field appears.

    6. In the MAC Address field, enter the Microsoft NLB cluster MAC address.

      For example, 00:01:02:03:04:05 .

  4. Click Submit .