Configuring Simplified vIST in SMLT topologies

This procedure shows how to configure Simplified vIST in an SMLT environment. It includes steps to configure the following:

  • Setting the boot config flag

  • Configuring the vIST peer

  • Enabling Simplified vIST

Important

Important

When you enable Simplified vIST with the virtual-ist enable command, two VLANs are automatically created to support vIST. The VLAN IDs are: 4086 and 4087.

Before you begin

SPBM must not be enabled on the vIST peers.

About this task

Important

Important

Do not change the system MTU to less than the default value of 1950 bytes. The system MTU must be 1950 or jumbo because of a header size increase.

Procedure

  1. In the navigation pane, expand the Configuration > Edit > Chassis folders.
  2. Click the Boot Config tab.
  3. Clear the EnableSpbmConfigMode field to disable the boot flag.

    The system responds with the following messages:

    Warning: Please save the configuration and reboot the switch for this to take effect.

    Warning: Please carefully save your configuration file before rebooting the switch. Saving configuration file when spbm-config-mode is changed to disable, removes SPBM configurations from the configuration file.

  4. Click Apply.
  5. Save the configuration, and then reboot the switch.
    Important

    Important

    A change to the EnableSpbmConfigMode boot flag requires a reboot for the change to take effect.

  6. Configure the SMLT MLT:
    1. Expand the Configuration > VLAN folders.
    2. Click MLT/LACP.
    3. Click the MultiLink/LACP Trunks tab.
    4. Click Insert.
    5. In the Id box, type the ID number of the MLT.
    6. In the PortType section, select access or trunk.
    7. In the Name box, type a name for the MLT, or accept the default.
    8. In the PortMembers box, click the (...) button.
    9. In the Port Editor: PortMembers dialog box, select the desired ports.
    10. Click Ok.
    11. In the VlanIdList box, click the (...) button.
    12. In the VlanIdList. dialog box, select the desired VLANs.
    13. Click Ok.
    14. In the MltType section, select splitMLT
    15. Click Insert.

      The switch adds the SMLT MLT to the MultiLink/LACP Trunks tab in the MLT_LACP box.

  7. Configure the vIST MLT:
    1. Repeat steps 6.a to 6.o to configure the MLT.
    2. Click virtualIstMLT to enable Simplified vIST.
    3. Click Insert.
  8. Create the vIST VLAN:
    1. Expand the Configuration > VLAN > VLANs folders.
    2. In the Basic tab, click Insert.
    3. In the Id box, enter an unused VLAN ID, or use the ID provided.
    4. In the MstpInstance box, click the down arrow, and then choose an MSTI instance from the list.
    5. In the Type box, select byPort.
    6. In the PortMembers box, click the (...) button.
    7. In the Port Editor: PortMembers dialog box, select the desired ports.
    8. Click OK.
    9. Click Insert.
    10. Select the vIST VLAN from the list of VLANs, and then click IP.
    11. Click Insert.
    12. Configure the IP address for the vIST VLAN.
  9. Repeat step 8 to create an SMLT VLAN and assign the SMLT MLT ID to it. Do not use the vIST MLT ID.
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