H3C S5500-EI series Operation Manual page 83

Operation Manual – VLAN
H3C S5500-EI Series Ethernet Switches
A Trunk port only allows packets from the default VLAN to be sent without the Tag
label.
II. Default VLAN
You can configure the default VLAN for a port. By default, VLAN 1 is the default VLAN
for all ports. However, this can be changed as needed.
An Access port only belongs to one VLAN. Therefore, its default VLAN is the
VLAN it resides in and cannot be configured.
You can configure the default VLAN for the Trunk port or the Hybrid port as they
can both belong to multiple VLANs.
After deletion of the default VLAN using the undo vlan command, the default
VLAN for an Access port will revert to VLAN 1, whereas that for the Trunk or
Hybrid port remains, meaning the port can use a nonexistent VLAN as the default
VLAN.
Note:
For a port in automatic voice VLAN mode, do not set the voice VLAN as the default
VLAN of the port. Otherwise, the system prompts error information. For information
about voice VLAN, refer to
Configured with the default VLAN, a port handles packets in the following ways:
Port type
Access Port
Voice VLAN
Inbound packets handling
If no tag is
If a tag is carried in the
carried in the
packet
Receive the packet if
its VLAN ID is the
same as the default
Tag the packet
VLAN ID
with the default
Discard the packet if
VLAN ID
its
different
default VLAN ID
1-7
Chapter 1 VLAN Configuration
Configuration.
packet
VLAN ID is
from the
Outbound packets
handling
Strip the Tag and
send the packet as
the VLAN ID is the
same with the default
VLAN ID