1-4
Many-to-one VLAN mapping is mutually exclusive with one-to-one VLAN mapping. With many-to-one
VLAN mapping enabled on any port, you cannot enable one-to-one VLAN mapping on any other port.
Examples
# Define a many-to-one VLAN mapping rule on Ethernet 1/0/1 to map original VLANs 1000 through
1002 to VLAN 1010.
<Sysname> system-view
System View: return to User View with Ctrl+Z.
[Sysname] interface Ethernet 1/0/1
[Sysname-Ethernet1/0/1] vlan-mapping n-to 1 vlan 1000 remark 1010
[Sysname-Ethernet1/0/1] vlan-mapping n-to 1 vlan 1001 remark 1010
[Sysname-Ethernet1/0/1] vlan-mapping n-to 1 vlan 1002 remark 1010
dhcp-snooping information ignore-vlanmapping
Syntax
dhcp-snooping information ignore-vlanmapping
undo dhcp-snooping information ignore-vlanmapping
View
System view, Ethernet port view
Parameters
None
Description
Use the dhcp-snooping information ignore-vlanmapping command in system view to enable all the
ports to add Option 82 carrying the original VLAN information to the DHCP requests.
Use the undo dhcp-snooping information ignore-vlanmapping command in system view to disable
all ports from adding Option 82 carrying the original VLAN information to the DHCP requests.
Use the dhcp-snooping information ignore-vlanmapping command in Ethernet port view to enable
the port to add Option 82 carrying the original VLAN information to the DHCP requests.
Use the undo dhcp-snooping information ignore-vlanmapping command in Ethernet port view to
disable the port from adding Option 82 carrying the original VLAN information to the DHCP requests.
To enable this function, enable DHCP snooping and DHCP snooping support for option 82 first.
Examples
# Enable all the ports to add Option 82 carrying the original VLAN information to the DHCP requests.
<Sysname> system-view
[Sysname] dhcp-snooping information ignore-vlanmapping
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