xref: /openbmc/u-boot/doc/README.VLAN (revision 54c57ae0)
1U-Boot has networking support for VLANs (802.1q), and CDP (Cisco
2Discovery Protocol).
3
4You control the sending/receiving of VLAN tagged packets with the
5"vlan" environmental variable. When not present no tagging is
6performed.
7
8CDP is used mainly to discover your device VLAN(s) when connected to
9a Cisco switch.
10
11Note: In order to enable CDP support a small change is needed in the
12networking driver. You have to enable reception of the
1301:00:0c:cc:cc:cc MAC address which is a multicast address.
14
15Various defines control CDP; see the README section.
16