20
Usage guidelines
To connect a VLAN to multiple subnets, assign one primary IP address and multiple secondary IP
addresses to a VLAN-interface. The maximum number of IP addresses that can be assigned to a
VLAN-interface is 512.
When you configure IP addresses for a VLAN-interface, follow these rules:
•
The primary IP address you assign to a VLAN-interface overwrites the previous one, if any.
•
Remove all secondary IP addresses before you remove the primary IP address.
•
To remove all IP addresses, use the
undo ip address
command without any parameter.
•
To remove the primary IP address, use the
undo ip address
ip-address
{
mask
|
mask-length
}
command.
•
To remove a secondary IP address, use the
undo ip address
ip-address
{
mask
|
mask-length
}
sub
command.
Examples
# Specify the IP address as 1.1.0.1, the subnet mask as 255.255.255.0 for VLAN-interface 1.
<Sysname> system-view
[Sysname] interface vlan-interface 1
[Sysname-Vlan-interface1] ip address 1.1.0.1 255.255.255.0
Related commands
display ip interface
(
Layer 3—IP Services Command Reference
)
mac-address
Use
mac-address
to assign a MAC address to a VLAN-interface.
Use
undo mac-address
to restore the default.
Syntax
mac-address
mac-address
undo mac-address
Views
VLAN-interface view
Default command level
2: System level
Parameters
mac-address
: Specifies a MAC address in the format of H-H-H.
Usage guidelines
VLAN-interfaces are virtual interfaces that are manually created and removed. Upon creation, a
VLAN-interface borrows the MAC address of a physical interface on the device. For this reason, all
VLAN-interfaces on a device share the same MAC address. In some applications, to avoid MAC
address collisions, use this command to set different MAC addresses for different VLAN-interfaces.
Examples
# Assign MAC address 0001-0001-0001 to VLAN-interface 11.
<Sysname> system-view
[Sysname] interface vlan-interface 11
[Sysname-Vlan-interface11] mac-address 1-1-1