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Layer 3 Features

  • Port-based LAN broadcast traffic forwarding (using port helpers) for multiple destination servers (EX2300 and EX3400)—Starting in Junos OS Release 22.3R1, you can configure port helpers on EX2300 switches and EX3400 switches on each port for multiple destination servers. Port helpers are port-based filters that listen on configured UDP ports for incoming broadcast traffic and forward those packets to configured destination servers as unicast traffic.

    Configure port helper filters using the forwarding-options helpers port <port-number> statement, with any of the following scopes:

    • Global—Match incoming broadcast traffic on any interface for a configured port, and forward the traffic to the configured server: set forwarding-options helper port port-number server server-ip-address

    • VLAN-specific—Match incoming broadcast traffic on an IRB interface for a configured port, and forward the traffic to the configured server: set forwarding-options helper port port-number interface irb-interface-name server server-ip-address

    • Interface-specific—Match incoming broadcast traffic on a Layer 3 interface for a configured port, and forward the traffic to the configured server: set forwarding-options helper port port-number interface interface-name server server-ip-address

    You can view the feature behavior and statistics by using the show helper statistics command.

    [See Configuring Port-based LAN Broadcast Packet Forwarding.]