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Dell Configuration Guide for the S4048–ON System 9.14.2.4

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Connecting a VLT Domain to an Attached Access Device (Switch or Server)

To connect a VLT domain to an attached access device, use the following commands.

On a VLT peer switch: To connect to an attached device, configure the same port channel ID number on each peer switch in the VLT domain.
  1. Configure the same port channel to be used to connect to an attached device and enter interface configuration mode.
    CONFIGURATION mode
    interface port-channel id-number
  2. Remove an IP address from the interface.
    INTERFACE PORT-CHANNEL mode
    no ip address
  3. Place the interface in Layer 2 mode.
    INTERFACE PORT-CHANNEL mode
    switchport
  4. Add one or more port interfaces to the port channel.
    INTERFACE PORT-CHANNEL mode
    channel-member interface
    interface: specify one of the following interface types:
    • For a 10-Gigabit Ethernet interface, enter the keyword TenGigabitEthernet then the slot/port/subport[/subport] information.
    • For a 40-Gigabit Ethernet interface, enter the keyword fortyGigE then the slot/port information.
  5. Ensure that the port channel is active.
    INTERFACE PORT-CHANNEL mode
    no shutdown
  6. Associate the port channel to the corresponding port channel in the VLT peer for the VLT connection to an attached device.
    INTERFACE PORT-CHANNEL mode
    vlt-peer-lag port-channel id-number
  7. Repeat Steps 1 to 6 on the VLT peer switch to configure the same port channel as part of the VLT domain.
  8. On an attached switch or server: To connect to the VLT domain and add port channels to it, configure a port channel. For an example of how to verify the port-channel configuration, refer to VLT Sample Configuration.
To configure the VLAN where a VLT peer forwards received packets over the VLTi from an adjacent VLT peer that is down, use the peer-down-vlan parameter. When a VLT peer with BMP reboots, untagged DHCP discover packets are sent to the peer over the VLTi. Using this configuration ensures the DHCP discover packets are forwarded to the VLAN that has the DHCP server.

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