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Configure external L3Out EPG contract inheritance by using the GUI

Updated: April 15, 2026

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Associate an external L3Out endpoint group with a contract master endpoint group to inherit its provided and consumed contracts.

Before you begin

Configure the tenant for the endpoint groups (EPGs).

Configure a Layer 3 Outside (L3Out) and the external L3Out EPG (l3extInstP) that will serve as the contract master.

Configure the contracts to inherit and associate them with the contract master EPG.

Use the Cisco Application Policy Infrastructure Controller ( APIC ) GUI to configure contract inheritance for an external L3Out EPG.

Procedure

  1. In the Navigation pane, choose Tenants > tenant-name > Networking > L3Outs.

  2. Expand l3out-name .

  3. Right-click External EPGs, and then choose Create External EPG.

  4. Enter a name for the external EPG and configure subnets and other attributes as required.

  5. Click Submit.

  6. Expand Networks.

  7. Click network-name .

  8. In the External EPG pane, click + for L3Out Contract Masters.

  9. Select the L3Out and external EPG that will serve as the contract master.

  10. Click Update.

    The external L3Out EPG inherits the contract associations of the contract master EPG.

  11. To view the inherited contracts, click the external EPG name, and then choose Contracts > Inherited Contracts.