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Configuring a VLAN Demultiplexing Interface

To configure a VLAN demux interface, include the following statements at the [edit interfaces] hierarchy level:

[edit interfaces]interface-name {unit logical-unit-number {... logical-interface-configuration ...}}demux0 {unit logical-unit-number {vlan-id number;demux-options {underlying-interface interface-name;}family family {demux-destination {destination-prefix;}demux-destination {source-prefix;}mac-validate (loose | strict)unnumbered-address interface-name <preferred-source-address address>;}}}

Keep the following guidelines in mind when configuring the demux interface:

  • Demux interfaces are supported on M120, M320, or MX Series routers only.
  • You can configure only one demux0 interface per chassis.
  • You must associate VLAN demux interfaces with an underlying physical interface.

    Note: VLAN demux interfaces currently support Gigabit Ethernet, Fast Ethernet, 10-Gigabit Ethernet, and aggregated Ethernet underlying interfaces.

  • The demux underlying interface must reside on the same logical system as the demux interfaces that you configure over it.
  • VLAN demux interfaces support the Internet Protocol version 4 (IPv4) suite inet and Internet Protocol version 6 (IPv6) inet6 family types.
  • If the address in a received packet does not match any demux VLAN ID, the packet is logically received on the underlying interface. For this reason, the underlying interface is often referred to as the “primary” interface.

Published: 2010-04-20

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