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VLAN mapping commands· 1

display vlan mapping· 1

vlan mapping· 2

 

VLAN mapping commands

display vlan mapping

Use display vlan mapping to display VLAN mapping information.

Syntax

display vlan mapping [ interface interface-type interface-number ]

Views

Any view

Predefined user roles

network-admin

network-operator

mdc-admin

mdc-operator

Parameters

interface interface-type interface-number: Specifies an interface by its type and number. If you do not specify an interface, the command displays VLAN mapping information on all interfaces.

Examples

# Display VLAN mapping information on all interfaces.

<Sysname> display vlan mapping

Interface GigabitEthernet1/0/1:

  Outer VLAN    Inner VLAN    Translated Outer VLAN    Translated Inner VLAN

  1             N/A           101                      N/A

Interface GigabitEthernet1/0/2:

  Outer VLAN    Inner VLAN    Translated Outer VLAN    Translated Inner VLAN

  80            N/A           101                      N/A

Interface GigabitEthernet1/0/4:

  Outer VLAN    Inner VLAN    Translated Outer VLAN    Translated Inner VLAN

  1-10          N/A           101                      1-10

  80            N/A           101                      80

Interface GigabitEthernet1/0/5:

  Outer VLAN    Inner VLAN    Translated Outer VLAN    Translated Inner VLAN

  101           1             201                      10

Table 1 Command output

Field	Description
Interface	Interface information.
Outer VLAN	Original outer VLAN. This field indicates the original VLAN when the Inner VLAN field displays N/A.
Inner VLAN	Original inner VLAN. This field displays N/A for the following VLAN mapping types: ·     One-to-one VLAN mapping. ·     Many-to-one VLAN mapping. ·     One-to-two VLAN mapping.
Translated Outer VLAN	Translated outer VLAN. This field indicates the translated VLAN when the Translated Inner VLAN field displays N/A.
Translated Inner VLAN	Translated inner VLAN. This field displays N/A for the following VLAN mapping types: ·     One-to-one VLAN mapping. ·     Many-to-one VLAN mapping.

 

Related commands

vlan mapping

vlan mapping

Use vlan mapping to configure VLAN mapping on an interface.

Use undo vlan mapping to cancel the VLAN mapping configuration.

Syntax

vlan mapping { vlan-id translated-vlan vlan-id | nest { range vlan-range-list | single vlan-id-list } nested-vlan vlan-id | nni | tunnel outer-vlan-id inner-vlan-id translated-vlan outer-vlan-id inner-vlan-id | uni { range vlan-range-list | single vlan-id-list } translated-vlan vlan-id }

undo vlan mapping { vlan-id translated-vlan vlan-id | all | nest { range vlan-range-list | single vlan-id-list } nested-vlan vlan-id | nni | tunnel outer-vlan-id inner-vlan-id translated-vlan outer-vlan-id inner-vlan-id | uni { range vlan-range-list | single vlan-id-list } translated-vlan vlan-id }

Default

No VLAN mapping is configured on an interface.

Views

Layer 2 Ethernet interface view, Layer 2 aggregate interface view

Predefined user roles

network-admin

mdc-admin

Parameters

vlan-id translated-vlan vlan-id: Specifies the original VLAN and translated VLAN for a one-to-one VLAN mapping. The value range for the vlan-id argument is 1 to 4094. The original VLAN and the translated VLAN cannot be the same.

uni range vlan-range-list translated-vlan vlan-id: Specifies the original VLAN ranges and the translated VLAN for a many-to-one VLAN mapping on the customer-side port. The vlan-range-list argument specifies a space-separated list of up to 10 VLAN items. Each item specifies a VLAN ID or a range of VLAN IDs in the form of vlan-id1 to vlan-id2. The value range for VLAN IDs is 1 to 4094. The value for the vlan-id2 argument must be equal to or greater than the value for the vlan-id1 argument. The value range for the vlan-id argument is 1 to 4094. Different VLAN ranges cannot overlap. Any of the original VLANs cannot be the same as the translated VLAN.

uni single vlan-id-list translated-vlan vlan-id: Specifies the original VLANs and the translated VLAN for a many-to-one VLAN mapping on the customer-side port. The vlan-id-list argument specifies a space-separated list of up to 10 VLAN IDs, each of which is in the range of 1 to 4094. The value range for the vlan-id argument is 1 to 4094. Any of the original VLANs cannot be the same as the translated VLAN.

nni: Configures the network-side port to use the original VLAN tags of the many-to-one mapping to replace the VLAN tags of the packets destined for the user network.

nest range vlan-range-list nested-vlan vlan-id: Specifies the CVLAN ranges and the SVLAN for a one-to-two VLAN mapping. The vlan-range-list argument specifies a space-separated list of up to 10 CVLAN items. Each item specifies a CVLAN ID or a range of CVLAN IDs in the format of vlan-id1 to vlan-id2. The value range for CVLAN IDs is 1 to 4094. The value for the vlan-id2 argument must be equal to or greater than the value for the vlan-id1 argument. Different CVLAN ranges cannot overlap. The vlan-id argument specifies the SVLAN ID in the range of 1 to 4094.

nest single vlan-id-list nested-vlan vlan-id: Specifies the CVLANs and the SVLAN for a one-to-two VLAN mapping. The vlan-id-list argument specifies a space-separated list of up to 10 CVLAN IDs, each of which is in the range of 1 to 4094. The vlan-id argument specifies the SVLAN ID in the range of 1 to 4094.

tunnel outer-vlan-id inner-vlan-id translated-vlan outer-vlan-id inner-vlan-id: Specifies the original outer VLAN ID and inner VLAN ID and the translated outer VLAN ID and inner VLAN ID for a two-to-two VLAN mapping. The value ranges for the outer-vlan-id argument and the inner-vlan-id argument are both 1 to 4094.

all: Deletes all VLAN mapping configurations from the interface.

Usage guidelines

For different types of VLAN mapping entries on an interface, both the original VLANs and the translated VLANs cannot overlap. For one-to-one VLAN mapping entries or two-to-two VLAN mapping entries, the translated VLANs cannot overlap. When the original VLANs of one-to-one or two-to-two VLAN mapping entries overlap, the most recent configuration takes effect.

On an interface, a transparent VLAN cannot be configured as an original VLAN or translated VLAN. For packets that have two layers of VLAN tags, both of the translated VLANs and original VLANs refer to only the outer VLANs. For more information about transparent VLANs, see Layer 2—LAN Switching Configuration Guide.

For many-to-one VLAN mappings to take effect, configure many-to-one VLAN mappings on both the customer side and the network side. An interface cannot be configured as both the customer-side port and network-side port of a many-to-one VLAN mapping. After you configure a port as the network-side port of a many-to-one VLAN mapping, do not configure other types of VLAN mappings on the port.

Before enabling or disabling QinQ, first clear the existing VLAN mapping entries. You cannot configure two-to-two VLAN mapping on a QinQ-enabled port.

To ensure correct traffic forwarding from the service provider network to the customer network, do not configure many-to-one VLAN mapping together with uRPF. For more information about uRPF, see Security Configuration Guide.

The MTU of an interface is 1500 bytes by default. After a VLAN tag is added to a packet, the packet length is added by 4 bytes. As a best practice, set the MTU to a minimum of 1504 bytes for ports on the forwarding path of the packet in the service provider network.

VLAN mapping takes effect only on VLAN-tagged packets received on an interface.

Examples

# Configure a one-to-one VLAN mapping on GigabitEthernet 1/0/1 to map VLAN 1 to VLAN 101.

<Sysname> system-view

[Sysname] interface gigabitethernet 1/0/1

[Sysname-GigabitEthernet1/0/1] vlan mapping 1 translated-vlan 101

# Configure many-to-one VLAN mappings on the customer-side port GigabitEthernet 1/0/2 to map VLANs 1 through 50 and VLAN 80 to VLAN 101. Configure the network-side port GigabitEthernet 1/0/3 to use the original VLAN tags of the many-to-one mappings to replace the VLAN tags of the packets destined for the user network.

<Sysname> system-view

[Sysname] interface gigabitethernet 1/0/2

[Sysname-GigabitEthernet1/0/2] vlan mapping uni range 1 to 50 translated-vlan 101

[Sysname-GigabitEthernet1/0/2] vlan mapping uni single 80 translated-vlan 101

[Sysname-GigabitEthernet1/0/2] quit

[Sysname] interface gigabitethernet 1/0/3

[Sysname-GigabitEthernet1/0/3] vlan mapping nni

# Configure one-to-two VLAN mappings on GigabitEthernet 1/0/4 to add SVLAN tag 101 to packets carrying VLAN tags 1 through 10 and VLAN tag 80.

<Sysname> system-view

[Sysname] interface gigabitethernet 1/0/4

[Sysname-GigabitEthernet1/0/4] vlan mapping nest range 1 to 10 nested-vlan 101

[Sysname-GigabitEthernet1/0/4] vlan mapping nest single 80 nested-vlan 101

# Configure a two-to-two VLAN mapping on GigabitEthernet 1/0/5 to map SVLAN 101 and CVLAN 1 to SVLAN 201 and CVLAN 10, respectively.

<Sysname> system-view

[Sysname] interface gigabitethernet 1/0/5

[Sysname-GigabitEthernet1/0/5] vlan mapping tunnel 101 1 translated-vlan 201 10

Related commands

display vlan mapping