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Configuring the ANCP Agent for ANCP-Triggered, Autosensed Dynamic VLANs

 

Starting in Junos OS Release 16.1R4, you can configure the ANCP agent to associate a neighbor with an access-facing physical interface for the creation of autosensed dynamic VLANs on the interface. When the ANCP agent receives a Port Up message from the neighbor, it triggers notification to the autoconfd daemon to initiate the detection, authorization, and creation of dynamic VLANs. Receipt of an out-of-band ANCP Port Down message triggers notification to the autoconfd daemon to initiate the destruction of an existing VLAN on the interface.

Note

The following physical interface types are supported: aggregated Ethernet (ae), Gigabit Ethernet (ge), 10-Gigabit Ethernet (xe), 100-Gigabit Ethernet (et), demux, and pseudowire (ps). The ps interface type was added in Junos OS Release 19.3R1.

This configuration assumes the following:

  • The dynamic profile is configured to instantiate a dynamic VLAN when notified by the ANCP agent that it has received an out-of-band ANCP Port Up message.

  • The RADIUS authentication server is properly configured to authorize the VLANs and apply services as needed.

  • The ANCP agent is configured to initiate interim accounting updates (which also enables immediate interim accounting updates) in response to information received in Port Up messages.

To map a neighbor to a physical interface for autosensed dynamic VLANs:

  • Specify the physical interface name.

Release History Table
Release
Description
Starting in Junos OS Release 16.1R4, you can configure the ANCP agent to associate a neighbor with an access-facing physical interface for the creation of autosensed dynamic VLANs on the interface.