Update IP Links to Generic Systems MTU

This field specifies the MTU for all L3 IP links facing generic system.

If you change the default to a null or empty (default) value the explicit MTU value won't be rendered; system defaults will be used. Custom larger MTU may be required to provide EVPN DCI functionality or to support fabric wide Jumbo frame functionality. For EVPN-DCI, we recommend an MTU of 9050.

To update the default IP Links to Generic Systems MTU setting from the Apstra GUI:

  1. From the blueprint, navigate to Staged > Fabric Settings > Fabric Policy and click Modify Settings.
    Fabric Settings interface screenshot showing navigation tabs like Dashboard, Analytics, and Staged. Focus on Fabric Policy tab with options for MTU Settings, Fabric Design, Route Options, Vendor Specific Settings, and Anti Affinity. Modify Settings button visible for configuration changes.
    The Modify Fabric Policy Settings dialog opens.
  2. In the MTU section enter the new value (1280 - 9216) in the Default IP Links to Generic Systems MTU field.
  3. Click Save Changes to save your changes and return to the Fabric Policy page.

When you're ready to activate your changes, commit them from the Uncommitted tab.