KYLAND Technology SICOM3024P, Руководство по работе в сети

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Advanced Configuration
33
Type PRI CFI VID
A 4-byte 802.1Q header, as the VLAN tag, is added to the traditional Ethernet data frame.
Type: 16 bits. It is used to identify a data frame carrying a VLAN tag. The value is 0x8100.
PRI: three bits, identifying the 802.1p priority of a packet.
CFI: one bit. 0 indicates Ethernet, and 1 indicates token ring.
VID: 12 bits, indicating the VLAN number. The value ranges from 1 to 4093. 0, 4094, and
4095 are reserved values.
Note:

VLAN 1 is the default VLAN and cannot be manually created and/or deleted.

Reserved VLANs are reserved to realize specific functions by the system and cannot be
manually created and/or deleted.
The packet with an 802.1Q header is a tagged packet; the one without 802.1Q header is an
untagged packet. All packets carry an 802.1Q tag in the switch.
6.2.3 Port-based VLAN
VLAN partition can be either port-based or MAC address-based. This series switches
support port-based VLAN partition. VLAN members can be defined based on switch ports.
After a port is added to a specified VLAN, the port can forward the packets with the tag for
the VLAN.
1.Port Type
Ports fall into two types according to how they handle VLAN tags when they forward
packets.

Untag port: Packets forwarded by an Untag port do not have VLAN tags. Untag ports are
usually used to connect to terminals that do not support 802.1Q. By default, all switch
ports are Untag ports and belong to VLAN1.

Tag port: All packets forwarded by a Tag port carry a VLAN tag. Tag ports are usually
used to connect network transmission devices.