03-Layer 2—LAN Switching Command Reference

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12-VLAN mapping commands
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12-VLAN mapping commands 43.60 KB

VLAN mapping commands

display vlan mapping

Use display vlan mapping to display VLAN mappings.

Syntax

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

Views

Any view

Predefined user roles

network-admin

network-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 mappings on all interfaces.

Examples

# Display VLAN mappings on all interfaces.

<Sysname> display vlan mapping

Interface Ten-GigabitEthernet1/0/1:

  Outer VLAN    Inner VLAN    Translated Outer VLAN    Translated Inner VLAN

  10            N/A           120                      N/A

 

Interface Ten-GigabitEthernet1/0/2:

  Outer VLAN    Inner VLAN    Translated Outer VLAN    Translated Inner VLAN

  4-4094        N/A           100                      N/A

 

Interface Ten-GigabitEthernet1/0/3:

  Outer VLAN    Inner VLAN    Translated Outer VLAN    Translated Inner VLAN

  12            N/A           110                      12

 

Interface Ten-GigabitEthernet1/0/4:

  Outer VLAN    Inner VLAN    Translated Outer VLAN    Translated Inner VLAN

  11            30            130                      40

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

VLAN mapping is not configured on an interface.

Views

Layer 2 Ethernet interface view, Layer 2 aggregate interface view

Predefined user roles

network-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. 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 form 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 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.

tunnel outer-vlan-id inner-vlan-id translated-vlan outer-vlan-id inner-vlan-id: Specifies the original SVLAN ID and CVLAN ID and the translated SVLAN ID and CVLAN 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.

To make many-to-one VLAN mapping take effect, configure many-to-one VLAN mapping in pairs on both the customer side and the network side. 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.

Customer-side many-to-one VLAN mapping is not supported in Layer 2 aggregate interface view.

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.

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.

VLAN mapping is mutually exclusive with EVB. Do not configure both features on a port.

Examples

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

<Sysname> system-view

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

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

# Configure many-to-one VLAN mappings on the customer-side port Ten-GigabitEthernet 1/0/2 to map VLANs 1 through 50 and VLAN 80 to VLAN 101. Configure the network-side port Ten-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 ten-gigabitethernet 1/0/2

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

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

[Sysname-Ten-GigabitEthernet1/0/2] quit

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

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

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

<Sysname> system-view

[Sysname] interface ten-gigabitethernet 1/0/4

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

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

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

<Sysname> system-view

[Sysname] interface ten-gigabitethernet 1/0/5

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

Related commands

display vlan mapping