tracking

https://www.educative.io/answers/what-is-trunking-in-networking

LA 链路聚合，也称为trunking

vlan

参考 https://www.practicalnetworking.net/stand-alone/vlans/

A simple representation of a single entry in a MAC address table would be: MAC Address Port.
A simple representation of a single entry in a MAC address table of a VLAN aware switch would be: VLAN# MAC Address Port.

The primary benefit of extending a VLAN to different physical switches is that the Layer 2 topology no longer has to be tied to the Physical Topology.

从 sfboot 看，vlans 甚至是可以做到硬件中去的

  pf-vlans=<tag>[,<tag>[,...]]|None
    Specifies a VLAN tag for each PF on the port in a comma-separated
    list. Each VLAN tag must be unique for the port and be in the
    range [0..4094]. Specifying pf-vlans=None will clear all VLAN tags
    on the port. Pf-vlans should be included after pf-count on the
    sfboot command line.
    If the number of PFs is changed then the VLAN tags will be cleared.

https://wiki.ubuntu.com/vlan

https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/networking_guide/sec-configure_802_1q_vlan_tagging_using_the_command_line

https://www.redhat.com/sysadmin/vlans-configuration

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