Contents

Configuring VLAN mapping· 1

About VLAN mapping· 1

VLAN mapping application scenario· 1

VLAN mapping implementations· 1

Restrictions and guidelines: VLAN mapping configuration· 2

Restriction: Hardware compatibility· 2

Restriction: Feature compatibility· 2

Prerequisites· 3

Configuring one-to-one VLAN mapping· 3

Display and maintenance commands for VLAN mapping· 3

VLAN mapping configuration examples· 4

Example: Configuring one-to-one VLAN mapping· 4

Configuring VLAN mapping

About VLAN mapping

VLAN mapping re-marks VLAN traffic with new VLAN IDs.

VLAN mapping application scenario

As shown in Figure 1, one-to-one mapping is used to replace the CVLAN of user packets with an SVLAN. With one-to-one VLAN mapping, packets from the customer network can be transmitted over the service provider network.

Figure 1 Application scenario of one-to-one VLAN mapping

 

VLAN mapping implementations

Figure 2 shows a simplified network that illustrates basic VLAN mapping terms.

Basic VLAN mapping terms include the following:

·          Uplink traffic—Traffic transmitted from the customer network to the service provider network.

·          Downlink traffic—Traffic transmitted from the service provider network to the customer network.

·          Network-side port—A port connected to or closer to the service provider network.

·          Customer-side port—A port connected to or closer to the customer network.

Figure 2 Basic VLAN mapping terms

 

As shown in Figure 3, one-to-one VLAN mapping is implemented on the customer-side port and replaces VLAN tags as follows:

·          Replaces the CVLAN with the SVLAN for the uplink traffic.

·          Replaces the SVLAN with the CVLAN for the downlink traffic.

Figure 3 One-to-one VLAN mapping implementation

 

Restrictions and guidelines: VLAN mapping configuration

Restriction: Hardware compatibility

VLAN mapping is supported only on the CSPC cards (except CSPC-GE16XP4L-E, CSPC-GE24L-E, and CSPC-GP24GE8XP2L-E) and CMPE-1104 cards.

Restriction: Feature compatibility

To add or replace VLAN tags for packets, you can configure both VLAN mapping and a QoS policy. The QoS policy takes effect if a configuration conflict occurs. For information about QoS policies, see ACL and QoS Configuration Guide.

Prerequisites

Before you configure VLAN mapping, create original and translated VLANs.

Configuring one-to-one VLAN mapping

About one-to-one VLAN mapping

Configure one-to-one VLAN mapping on the PE (see Figure 1) to isolate traffic of the same service type from different homes.

Procedure

1.        Enter system view.

system-view

2.        Enter interface view.

¡  Enter Layer 2 Ethernet interface view.

interface interface-type interface-number

¡  Enter Layer 2 aggregate interface view.

interface bridge-aggregation interface-number

3.        Set the link type of the port.

port link-type { hybrid | trunk }

By default, the link type of a port is access.

4.        Assign the port to the original VLAN and the translated VLAN.

¡  Assign the trunk port to the original VLAN and the translated VLAN.

port trunk permit vlan vlan-id-list

By default, a trunk port is assigned to VLAN 1.

¡  Assign the hybrid port to the original VLAN and the translated VLAN as a tagged member.

port hybrid vlan vlan-id-list tagged

By default, a hybrid port is an untagged member of the VLAN to which the port belongs when its link type is access.

5.        Configure a one-to-one VLAN mapping.

vlan mapping vlan-id translated-vlan vlan-id

By default, no VLAN mapping is configured on an interface.

Display and maintenance commands for VLAN mapping

Execute display commands in any view.

 

Task	Command
Display VLAN mapping information.	display vlan mapping [ interface interface-type interface-number ]

 

VLAN mapping configuration examples

Example: Configuring one-to-one VLAN mapping

Network configuration

As shown in Figure 4, configure one-to-one VLAN mapping on the PE to map VLAN 10 to VLAN 100, so user packets can be transmitted over the service provider network.

Figure 4 Network diagram

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Procedure

1.        Configure PE:

# Create the original VLAN and the translated VLAN.

<PE> system-view

[PE] vlan 10

[PE-vlan10] quit

[PE] vlan 100

[PE-vlan100] quit

# Configure customer-side port Ten-GigabitEthernet 1/0/1 as a trunk port.

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

[PE-Ten-GigabitEthernet1/0/1] port link-type trunk

# Assign Ten-GigabitEthernet 1/0/1 to the original VLAN and the translated VLAN.

[PE-Ten-GigabitEthernet1/0/1] port trunk permit vlan 10 100

# Configure one-to-one VLAN mapping on Ten-GigabitEthernet 1/0/1 to map VLAN 10 to VLAN 100.

[PE-Ten-GigabitEthernet1/0/1] vlan mapping 10 translated-vlan 100

[PE-Ten-GigabitEthernet1/0/1] quit

# Configure network-side port Ten-GigabitEthernet 1/0/2 as a trunk port.

[PE] interface ten-gigabitethernet 1/0/2

[PE-Ten-GigabitEthernet1/0/2] port link-type trunk

# Assign Ten-GigabitEthernet 1/0/2 to VLAN 100.

[PE-Ten-GigabitEthernet1/0/2] port trunk permit vlan 100

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

Verifying the configuration

# Verify VLAN mapping information on the PE.

[PE] display vlan mapping

Interface Ten-GigabitEthernet1/0/1:

  Outer VLAN    Inner VLAN    Translated Outer VLAN    Translated Inner VLAN

  10            N/A           100                      N/A