H3C Technologies H3C SecBlade NetStream Cards - Manual (Page 101)

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NOTE:
•
As the default VLAN, VLAN 1 cannot be created or removed.
• You cannot manually create or remove VLANs reserved for special purposes.
• To remove a protocol reserved or dynamic VLAN, remove the configuration from the VLAN first, and
execute the undo vlan command.
• After associating an isolate-user-VLAN with a secondary VLAN, you cannot add ports to, remove ports
from, or remove the VLANs. To do that, remove the association first.
• You can configure broadcast suppression to limit the size of broadcast traffic permitted to pass through
a VLAN. When the broadcast traffic exceeds the upper threshold, the exceeding broadcast traffic will be
dropped.
Configuring basic settings of a VLAN interface
VLAN interface overview
For hosts of different VLANs to communicate, you must use a router or Layer 3 switch to perform Layer 3
forwarding. To achieve this, VLAN interfaces are used.
VLAN interfaces are virtual interfaces used for Layer 3 communication between different VLANs. They do
not exist as physical entities on devices. For each VLAN, you can create one VLAN interface. You can
assign the VLAN interface an IP address and specify it as the gateway of the VLAN to forward traffic
destined for an IP subnet different from that of the VLAN.
Configuration procedure
Follow these steps to configure basic settings of a VLAN interface:
To do… Use the command… Remarks
Enter system view system-view —
Create a VLAN interface and
enter VLAN interface view interface vlan-interface
vlan-interface-id
Required
If the VLAN interface already exists, you
enter its view directly.
Assign an IP address to the
VLAN interface ip address ip-address { mask |
mask-length } [ sub ]
Optional
By default, no IP address is assigned to any
VLAN interface.
Configure the description of
the VLAN interface
description text
Optional
By default, the description of a VLAN is the
VLAN interface name. For example,
Vlan-interface1 Interface.