Contents

VLAN mapping commands· 1

display vlan mapping· 1

vlan mapping· 2

vlan mapping untagged· 4

 

VLAN mapping commands

MDC is supported only when the device operates in standalone mode. For more information about standalone mode, see IRF configuration in Virtual Technologies Configuration Guide. For more information about MDC and device models that support MDC, see MDC configuration in Virtual Technologies Configuration Guide.

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 Ten-GigabitEthernet3/0/1:

  Outer VLAN    Inner VLAN    Translated Outer VLAN    Translated Inner VLAN

  10            N/A           120                      N/A

 

Interface Ten-GigabitEthernet3/0/2:

  Outer VLAN    Inner VLAN    Translated Outer VLAN    Translated Inner VLAN

  1024-4094     N/A           100                      N/A

 

Interface Ten-GigabitEthernet3/0/3:

  Outer VLAN    Inner VLAN    Translated Outer VLAN    Translated Inner VLAN

  12            N/A           110                      12

 

Interface Ten-GigabitEthernet3/0/4:

  Outer VLAN    Inner VLAN    Translated Outer VLAN    Translated Inner VLAN

  11            30            130                      40

Table 1 Command output

Field	Description
Outer VLAN	Original outer VLAN. This field indicates the original VLAN for one-to-one VLAN mapping, many-to-one VLAN mapping, and one-to-two VLAN mapping. This field displays N/A for zero-to-two VLAN mapping.
Inner VLAN	Original inner VLAN. This field displays N/A for one-to-one VLAN mapping, many-to-one VLAN mapping, and one-to-two VLAN mapping. This field displays N/A for zero-to-two VLAN mapping.
Translated Outer VLAN	Translated outer VLAN. This field indicates the translated VLAN for one-to-one VLAN mapping and many-to-one VLAN mapping. This field indicates the SVLAN to be added for zero-to-two VLAN mapping.
Translated Inner VLAN	Translated inner VLAN. This field displays N/A for one-to-one VLAN mapping and many-to-one VLAN mapping. This field indicates the CVLAN to be added for zero-to-two 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 single vlan-id-list nested-vlan vlan-id | 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 single vlan-id-list nested-vlan vlan-id | 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 8 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 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 8 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.

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 eight 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, original inner VLAN ID, translated outer VLAN ID, and translated 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

The original and translated VLANs in VLAN mappings on an interface must meet the following requirements:

·     Different types of VLAN mapping entries cannot include the same original VLANs or translated VLANs.

·     Different one-to-one or two-to-two VLAN mapping entries cannot include the same translated VLANs. If you configure multiple one-to-one or two-to-two VLAN mapping entries for the same original VLANs, the most recent configuration takes effect.

You can configure only one many-to-one VLAN mapping on an interface. To modify the many-to-one VLAN mapping, perform the following tasks:

1.     Execute the undo vlan mapping command to delete the existing many-to-one VLAN mapping.

2.     Configure another many-to-one VLAN mapping.

When you configure many-to-one VLAN mappings, following these restrictions and guidelines:

·     An interface cannot be configured as the customer-side port and network-side port of many-to-one VLAN mapping at the same time.

·     After you configure an interface as the network-side interface of many-to-one VLAN mapping, do not configure the other types of VLAN mapping on the interface.

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

The configuration restrictions between QinQ and VLAN mappings are as follows:

·     Before you enable or disable QinQ on a port, you must remove all VLAN mappings on the port.

·     You cannot configure two-to-two VLAN mappings on a QinQ-enabled port.

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 on the service provider network.

Examples

# Configure a one-to-one VLAN mapping on Ten-GigabitEthernet 3/0/1 to map VLAN 1 to VLAN 101.

<Sysname> system-view

[Sysname] interface ten-gigabitethernet 3/0/1

[Sysname-Ten-GigabitEthernet3/0/1] vlan mapping 1 translated-vlan 101

# Configure many-to-one VLAN mappings on the customer-side port (Ten-GigabitEthernet 3/0/2) to map VLANs 1 through 50 to VLAN 101.

<Sysname> system-view

[Sysname] interface ten-gigabitethernet 3/0/2

[Sysname-Ten-GigabitEthernet3/0/2] vlan mapping uni range 1 to 50 translated-vlan 101

# Configure one-to-two VLAN mappings on Ten-GigabitEthernet 3/0/4 to add SVLAN tag 101 to packets carrying VLAN tag 80.

<Sysname> system-view

[Sysname] interface ten-gigabitethernet 3/0/4

[Sysname-Ten-GigabitEthernet3/0/4] vlan mapping nest single 80 nested-vlan 101

# Configure a two-to-two VLAN mapping on Ten-GigabitEthernet 3/0/5 to map SVLAN 101 and CVLAN 1 to SVLAN 201 and CVLAN 10.

<Sysname> system-view

[Sysname] interface ten-gigabitethernet 3/0/5

[Sysname-Ten-GigabitEthernet3/0/5] vlan mapping tunnel 101 1 translated-vlan 201 10

Related commands

display vlan mapping

vlan mapping untagged

Use vlan mapping untagged to configure zero-to-two VLAN mapping on an interface.

Use undo vlan mapping untagged to remove the zero-to-two VLAN mapping configuration.

Syntax

vlan mapping untagged nested-outer-vlan outer-vlan-id nested-inner-vlan inner-vlan-id

undo vlan mapping untagged

Default

No zero-to-two 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

nested-outer-vlan outer-vlan-id: Specifies the SVLAN ID in the range of 1 to 4094.

nested-inner-vlan inner-vlan-id: Specifies the CVLAN ID in the range of 1 to 4094.

Usage guidelines

This command takes effect only on ports that use VLAN 1 as the PVID.

Before you modify a zero-to-two VLAN mapping, first execute the undo vlan mapping untagged command to remove the previous configuration.

As a best practice, set the MTU to a minimum of 1504 bytes for ports on the forwarding path of the double-tagged packet in the service provider network.

Examples

# Configure a zero-to-two VLAN mapping on Ten-GigabitEthernet 3/0/1 to add SVLAN 200 and CVLAN 100 to untagged packets.

<Sysname> system-view

[Sysname] interface ten-gigabitethernet 3/0/1

[Sysname-Ten-GigabitEthernet3/0/1] vlan mapping untagged nested-outer-vlan 200 nested-inner-vlan 100

Related commands

display vlan mapping