# Adding an MLT-based SMLT

Use this procedure to add an MLT-based SMLT.

Important

For SMLT to function properly, you must manually disable STP on all SMLT, IST, and SLT ports in all spanning tree groups or instances to which the ports belong. You must also disable STP on all edge switch MLT ports that are connected to the SMLT or SLT.

You can create an SMLT from the MultiLink Trunks tab by selecting the MLT type as SMLT and then specifying an SMLT ID.

## Procedure steps

1. From the navigation tree, double-click VLAN.

2. From the VLAN tree, click MLT/LACP.

3. Select the MultiLink Trunks tab.

4. From the displayed list of MLTs, choose an available MLT to configure as an SMLT.

5. In the row containing the desired MLT, double-click the PortMembers field.

6. Click the ports to include in the MLT-based SMLT.

   For the 5000 Series, up to eight same-type ports can belong to a single MLT.

7. Click OK.

8. Double-click the MltType field and choose splitMLT from the list.

9. In the SmltId field, type an unused SMLT ID (1 - 32).

   Note

   The corresponding SMLTs between aggregation switches must have matching SMLT IDs. The same ID number must be used on both sides.

10. Click Apply.