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Configuring Targeted Broadcast

 

The following sections explain how to configure targeted broadcast on an egress interface and its options:

Configuring Targeted Broadcast and Its Options

You can configure targeted broadcast on an egress interface with different options. You can either allow the IP packets destined for a Layer 3 broadcast address to be forwarded on the egress interface and to send a copy of the IP packets to the Routing Engine or you can allow the IP packets to be forwarded on the egress interface only. Note that the packets are broadcast only if the egress interface is a LAN interface.

To configure targeted broadcast and its options:

  1. Configure the physical interface.
  2. Configure the logical unit number at the [edit interfaces interface-name hierarchy level.
  3. Configure the protocol family as inet at the [edit interfaces interface-name unit interface-unit-number hierarchy level.
  4. Configure targeted broadcast at the [edit interfaces interface-name unit interface-unit-number family inet hierarchy level
  5. Specify one of the following options as per requirement:
    • To allow IP packets destined for a Layer 3 broadcast address to be forwarded on the egress interface and to send a copy of the IP packets to the Routing Engine.

    • To allow IP packets to be forwarded on the egress interface only.

Note

Targeted broadcast does not work when the targeted broadcast option forward-and-send-to-re and the traffic sampling option sampling are configured on the same egress interface of an M320 router, a T640 router, or an MX960 router. To overcome this scenario, you must either disable one of the these options or enable the sampling option with the targeted broadcast option forward-only on the egress interface. For information about traffic sampling, see Configuring Traffic Sampling.

Display Targeted Broadcast Configuration Options

The following topics display targeted broadcast configuration with its various options:

Forward IP Packets On the Egress Interface and To the Routing Engine

Purpose

Display the configuration when targeted broadcast is configured on the egress interface to forward the IP packets on the egress interface and to send a copy of the IP packets to the Routing Engine.

Action

To display the configuration run the show command at the [edit interfaces interface-name unit interface-unit-number family inet] where the interface name is ge-2/0/0, the unit value is set to 0, the protocol family is set to inet.

Forward IP Packets On the Egress Interface Only

Purpose

Display the configuration when targeted broadcast is configured on the egress interface to forward the IP packets on the egress interface only.

Action

To display the configuration run the show command at the [edit interfaces interface-name unit interface-unit-number family inet] where the interface name is ge-2/0/0, the unit value is set to 0, the protocol family is set to inet.

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