Technical Documentation

Configuring VLAN Dynamic Profiles

Creating dynamic single-tag VLANs or stacked (dual-tag) VLANs requires the use of dynamic profiles. The dynamic profile automatically references the VLAN interface and creates the interface unit and the necessary VLAN IDs for each new single-tag VLAN or stacked VLAN.

Note: VLAN dynamic profiles do not support user-defined variables. Use only Junos VLAN predefined variables when configuring VLAN dynamic profiles. See Dynamic Variables Overview for information about dynamic variables.

Configuring a VLAN Dynamic Profile for Creating Single-Tag VLANs Using Standard TPID Values

You can configure a VLAN dynamic profile to create single-tag VLANs that accept only standard TPID values (a TPID value of 0x8100) by using use the vlan-id statement and the $junos-vlan-id variable.

Note: This procedure configures a dynamic profile that accepts only TPID values of 0x8100. To configure a VLAN dynamic profile for creating VLANs using any TPID values, see Configuring a VLAN Dynamic Profile for Creating Single-Tag VLANs Using Any TPID Values.

Before you begin:

To configure a dynamic VLAN profile:

  1. Ensure that the VLAN dynamic profile uses the $junos-interface-ifd-name variable for the dynamic interface and the $junos-interface-unit variable for the interface unit.
  2. (Optional) To support dynamic demux interfaces, enable them using the demux-source statement.
    1. For IPv4 demux interfaces, specify inet as the source type.
      [edit dynamic-profiles VLAN-PROF1 interfaces "$junos-interface-ifd-name" unit "$junos-interface-unit"]user@host# set demux-source inet
    2. For IPv6 demux interfaces, specify inet6 as the source type.
      [edit dynamic-profiles VLAN-PROF1 interfaces "$junos-interface-ifd-name" unit "$junos-interface-unit"]user@host# set demux-source inet6
  3. (Optional) To configure the router to respond to any ARP request, specify the proxy-arp statement.
    [edit dynamic-profiles VLAN-PROF1 interfaces "$junos-interface-ifd-name" unit "$junos-interface-unit"]user@host# set proxy-arp
  4. Specify that you want to use dynamic VLAN IDs in the dynamic profile.
    [edit dynamic-profiles VLAN-PROF1 interfaces "$junos-interface-ifd-name" unit "$junos-interface-unit"]user@host# set vlan-id $junos-vlan-id

    When the dynamic profile is instantiated, the variable is dynamically replaced with a VLAN ID within the VLAN range specified at the [interfaces] hierarchy level.

  5. Define the unit family type.
    1. For IPv4 interfaces, specify the inet family type.
      [edit dynamic-profiles VLAN-PROF1 interfaces "$junos-interface-ifd-name" unit "$junos-interface-unit"]user@host# set family inet
    2. For IPv6 interfaces, specify the inet6 family type.
      [edit dynamic-profiles VLAN-PROF1 interfaces "$junos-interface-ifd-name" unit "$junos-interface-unit"]user@host# set family inet6
  6. (Optional) Enable IP and MAC address validation for dynamic demux interfaces in a dynamic profile.
    [edit dynamic-profiles VLAN-PROF1 interfaces "$junos-interface-ifd-name" unit "$junos-interface-unit" family inet]user@host# set mac-validate strict
  7. Specify the unnumbered address.
    [edit dynamic-profiles VLAN-PROF1 interfaces "$junos-interface-ifd-name" unit "$junos-interface-unit" family inet]user@host# set unnumbered-address (Dynamic Profiles) lo.0
  8. Specify the preferred source address.
    [edit dynamic-profiles VLAN-PROF1 interfaces "$junos-interface-ifd-name" unit "$junos-interface-unit" family inet]user@host# set preferred-source-address 192.0.16.1

Configuring a VLAN Dynamic Profile for Creating Single-Tag VLANs Using Any TPID Values

You can configure a VLAN dynamic profile to create single-tag VLANs that accept any TPID values by configuring the vlan-tags statement and the $junos-vlan-id variable.

Note: For procedures to configure a VLAN dynamic profile for creating single-tag VLANs that use only standard TPID values (a TPID value of 0x8100), see Configuring a VLAN Dynamic Profile for Creating Single-Tag VLANs Using Standard TPID Values.

Before you begin:

To configure a dynamic VLAN profile:

  1. Ensure that the VLAN dynamic profile uses the $junos-interface-ifd-name variable for the dynamic interface and the $junos-interface-unit variable for the interface unit.
  2. (Optional) To support dynamic demux interfaces, enable them using the demux-source statement.
    1. For IPv4 demux interfaces, specify inet as the source type.
      [edit dynamic-profiles VLAN-PROF1 interfaces "$junos-interface-ifd-name" unit "$junos-interface-unit"]user@host# set demux-source inet
    2. For IPv6 demux interfaces, specify inet6 as the source type.
      [edit dynamic-profiles VLAN-PROF1 interfaces "$junos-interface-ifd-name" unit "$junos-interface-unit"]user@host# set demux-source inet6
  3. (Optional) To configure the router to respond to any ARP request, specify the proxy-arp statement.
    [edit dynamic-profiles VLAN-PROF1 interfaces "$junos-interface-ifd-name" unit "$junos-interface-unit"]user@host# set proxy-arp
  4. Specify that you want to use dynamic VLAN IDs in the dynamic profile.
    [edit dynamic-profiles VLAN-PROF1 interfaces "$junos-interface-ifd-name" unit "$junos-interface-unit"]user@host# set vlan-tags outer $junos-vlan-id

    The variable is dynamically replaced with both the TPID value and a VLAN ID within the VLAN range specified at the [interfaces] hierarchy level.

  5. Define the unit family type.
    1. For IPv4 interfaces, specify the inet family type.
      [edit dynamic-profiles VLAN-PROF1 interfaces "$junos-interface-ifd-name" unit "$junos-interface-unit"]user@host# set family inet
    2. For IPv6 interfaces, specify the inet6 family type.
      [edit dynamic-profiles VLAN-PROF1 interfaces "$junos-interface-ifd-name" unit "$junos-interface-unit"]user@host# set family inet6
  6. (Optional) Enable IP and MAC address validation for dynamic demux interfaces in a dynamic profile.
    [edit dynamic-profiles VLAN-PROF1 interfaces "$junos-interface-ifd-name" unit "$junos-interface-unit" family inet]user@host# set mac-validate strict
  7. Specify the unnumbered address.
    [edit dynamic-profiles VLAN-PROF1 interfaces "$junos-interface-ifd-name" unit "$junos-interface-unit" family inet]user@host# set unnumbered-address (Dynamic Profiles) lo.0
  8. Specify the preferred source address.
    [edit dynamic-profiles VLAN-PROF1 interfaces "$junos-interface-ifd-name" unit "$junos-interface-unit" family inet]user@host# set preferred-source-address 192.0.16.1

Configuring a Stacked VLAN Dynamic Profile

You can configure a dynamic profile for creating stacked 802.1Q VLANs.

Before you begin:

To configure a stacked VLAN dynamic profile:

  1. Ensure that the VLAN dynamic profile uses the $junos-interface-ifd-name variable for the dynamic interface and the $junos-interface-unit variable for the interface unit.
  2. (Optional) To support dynamic demux interfaces, enable them using the demux-source statement.
    1. For IPv4 demux interfaces, specify inet as the source type.
      [edit dynamic-profiles VLAN-PROF1 interfaces "$junos-interface-ifd-name" unit "$junos-interface-unit"]user@host# set demux-source inet
    2. For IPv6 demux interfaces, specify inet6 as the source type.
      [edit dynamic-profiles VLAN-PROF1 interfaces "$junos-interface-ifd-name" unit "$junos-interface-unit"]user@host# set demux-source inet6
  3. (Optional) To configure the router to respond to any ARP request, specify the proxy-arp statement.
    [edit dynamic-profiles VLAN-PROF1 interfaces "$junos-interface-ifd-name" unit "$junos-interface-unit"]user@host# set proxy-arp
  4. Specify the outer VLAN ID variable.
    [edit dynamic-profiles STACKED-VLAN-PROF1 interfaces "$junos-interface-ifd-name" unit "$junos-interface-unit"]user@host# set vlan-tags outer $junos-stacked-vlan-id

    The variable is dynamically replaced with an outer VLAN ID within the VLAN range specified at the [interfaces] hierarchy level.

  5. Specify the inner VLAN ID variable.
    [edit dynamic-profiles STACKED-VLAN-PROF1 interfaces "$junos-interface-ifd-name" unit "$junos-interface-unit"]user@host# set vlan-tags inner $junos-vlan-id

    The variable is dynamically replaced with an inner VLAN ID within the VLAN range specified at the [interfaces] hierarchy level.

  6. Define the unit family type.
    1. For IPv4 interfaces, specify the inet family type.
      [edit dynamic-profiles VLAN-PROF1 interfaces "$junos-interface-ifd-name" unit "$junos-interface-unit"]user@host# set family inet
    2. For IPv6 interfaces, specify the inet6 family type.
      [edit dynamic-profiles VLAN-PROF1 interfaces "$junos-interface-ifd-name" unit "$junos-interface-unit"]user@host# set family inet6
  7. (Optional) Enable IP and MAC address validation for dynamic demux interfaces in a dynamic profile.
    [edit dynamic-profiles VLAN-PROF1 interfaces "$junos-interface-ifd-name" unit "$junos-interface-unit" family inet]user@host# set mac-validate strict
  8. Specify the unnumbered address.
    [edit dynamic-profiles VLAN-PROF1 interfaces "$junos-interface-ifd-name" unit "$junos-interface-unit" family inet]user@host# set unnumbered-address (Dynamic Profiles) lo.0
  9. Specify the preferred source address.
    [edit dynamic-profiles VLAN-PROF1 interfaces "$junos-interface-ifd-name" unit "$junos-interface-unit" family inet]user@host# set preferred-source-address 192.0.16.1

Configuring a VLAN Dynamic Profile That Associates VLAN Interfaces with Separate Routing Instances

You can configure a VLAN dynamic profile that dynamically creates underlying VLAN interfaces and associates these interfaces with dynamically-created routing instances. The VLAN interface is created in the default logical system (LS) for a specific routing instance as defined by VSA 26–1 (LSRI-Name) on the AAA server (for example, RADIUS server).

To configure a dynamic VLAN profile using routing instances:

  1. Name the profile.
    [edit]user@host# edit dynamic-profiles VLAN_PROFILE_RI
  2. Specify that you want to dynamically create routing instances on the default logical system.
    [edit dynamic-profiles VLAN_PROFILE_RI]user@host# edit routing-instances $junos-routing-instance
  3. Define the routing instance interface statement with the internal $junos-interface-name variable used by the router to match the interface name of the receiving interface.
    [edit dynamic-profiles VLAN_PROFILE_RI routing-instances “$junos-routing-instance”]user@host# set interface $junos-interface-name
  4. Define the dynamic profile interfaces statement with the internal $junos-interface-ifd-name variable.
    [edit dynamic-profiles VLAN_PROFILE_RI]user@host# edit interfaces $junos-interface-ifd-name
  5. Define the unit statement with the internal $junos-interface-unit variable used by the router to generate a unit value for the interface.
    [edit dynamic-profiles VLAN_PROFILE_RI interfaces "$junos-interface-ifd-name"]user@host# edit unit $junos-interface-unit
  6. To support dynamic demux interfaces, enable them using the demux-source statement.
    1. For IPv4 demux interfaces, specify inet as the source type.
      [edit dynamic-profiles VLAN-PROF1 interfaces "$junos-interface-ifd-name" unit "$junos-interface-unit"]user@host# set demux-source inet
    2. For IPv6 demux interfaces, specify inet6 as the source type.
      [edit dynamic-profiles VLAN-PROF1 interfaces "$junos-interface-ifd-name" unit "$junos-interface-unit"]user@host# set demux-source inet6
  7. (Optional) To configure the router to respond to any ARP request, specify the proxy-arp statement.
    [edit dynamic-profiles VLAN_PROFILE_RI interfaces "$junos-interface-ifd-name" unit "$junos-interface-unit"]user@host# set proxy-arp
  8. Specify that you want to use dynamic VLAN IDs in the dynamic profile.
    [edit dynamic-profiles VLAN_PROFILE_RI interfaces "$junos-interface-ifd-name" unit "$junos-interface-unit"]user@host# set vlan-id $junos-vlan-id

    The variable is dynamically replaced with both the TPID value and a VLAN ID within the VLAN range specified at the [interfaces] hierarchy level.

  9. Define the unit family type.
    1. For IPv4 interfaces, specify the inet family type.
      [edit dynamic-profiles VLAN-PROF1 interfaces "$junos-interface-ifd-name" unit "$junos-interface-unit"]user@host# set family inet
    2. For IPv6 interfaces, specify the inet6 family type.
      [edit dynamic-profiles VLAN-PROF1 interfaces "$junos-interface-ifd-name" unit "$junos-interface-unit"]user@host# set family inet6
  10. (Optional) Enable IP and MAC address validation for dynamic demux interfaces in a dynamic profile.
    [edit dynamic-profiles VLAN_PROFILE_RI interfaces "$junos-interface-ifd-name" unit "$junos-interface-unit" family inet]user@host# set mac-validate strict
  11. Specify the unnumbered address to dynamically create loopback interfaces.
    [edit dynamic-profiles VLAN_PROFILE_RI interfaces "$junos-interface-ifd-name" unit "$junos-interface-unit" family inet]user@host# set unnumbered-address (Dynamic Profiles) $junos-loopback-interface
  12. (Optional) Specify the preferred source address.
    [edit dynamic-profiles VLAN-PROF1 interfaces "$junos-interface-ifd-name" unit "$junos-interface-unit" family inet]user@host# set preferred-source-address 192.0.16.1

Published: 2010-07-13

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