Placing a VLAN Tag on the Management Port (eth0)

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Issue

I want to have my eth0 management port use VLAN tagging. How do I configure this?

Environment

  • Cumulus Linux 2.0.x
  • Cumulus Linux 2.1.x
  • Cumulus Linux 2.2.x
  • Cumulus Linux 2.5.x

Resolution

Configure a VLAN subinterface for eth0 in /etc/network/interfaces. Do one of the following:

  • If eth0 is configured with DHCP, use something similar for the second stanza below:

    auto eth0
    iface eth0
    
    auto eth0.TAG
    iface eth0.TAG dhcp
    

    Where TAG is the VLAN tag number.

  • If eth0 is configured with a static IP address, use something similar for the second stanza below:

    auto eth0
    iface eth0
    
    auto eth0.TAG
    iface eth0.TAG
        address specify.some.address.here/mask
    

    Where TAG is the tag number and the address line contains the static IP address and netmask for eth0.

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