IP Broadcast Helper
IP Broadcast Helper is a form of static addressing that uses directed broadcasts to forward local and all-nets broadcasts to desired destinations within the internetwork. IP Broadcast Helper allows the relaying of broadcast UDP packets on a LAN as unicasts to one or more remote servers. This is useful when you relocate servers or hosts from their original common segment and still want the service to be available.
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Note - For more information, see RFC1542 section 4.
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Configuring IP Broadcast helper - WebUI
To configure IP broadcast helper
- Open the page of the WebUI.
- Use the option to control whether to forward packets that are not locally originated by a source directly on the receiving interface.
- In the section, click .
The window opens.
- Select the to which you want to add support for IP helper services.
- Add a number to the helper services.
- Add a (server) IPv4 address for the UDP port.
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Note - To enable IP Broadcast Helper in a cluster, do the configuration on each cluster member
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IP Broadcast helper configuration parameters
Parameter
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Description
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Controls whether packets will be forwarded that are not locally originated by a source directly on the receiving interface.
Enable to forward packets even if the source is not directly on the receiving interface. Clear the option to require that packets are generated by a source that is directly on the receiving interface to be eligible for relay.
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The interface on which the IP helper service runs.
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The UDP service to be forwarded by the interface. Client UDP packets with the UDP port number are forwarded to the relay.
- Range: 0-65535.
- Default: None.
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The IP address of the server defined for forwarding for the interface and UDP service.
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Configuring IP Broadcast Helper - CLI (iphelper)
Forwarding Non-Local Packets
Use the following commands to control whether to forward packets that are not locally originated by a source directly on the receiving interface.
set iphelper forward‑nonlocal <on | off>
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Parameter
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Description
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forward‑nonlocal <on | off>
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Select on to forward packets even if the source is not directly on the receiving interface.
Select off to require that packets are generated by a source that is directly on the receiving interface to be eligible for relay .
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IP Broadcast Helper interfaces
Use the following commands configure IP Broadcast Helper properties for specific interfaces.
set iphelper interface if_name
off
udp‑port <1‑65535> off
udp‑port <1‑65535> relay‑to ip_address <on | off>
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Parameter
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Description
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interface <if_name> off
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Disable the interface configured for iphelper
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udp‑port <1‑65535> off
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Disable the UDP services configured for this interface.
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udp‑port <1‑65535> relay‑to ip_address <on | off>
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The UDP service to be forwarded by the interface. Client UDP packets with the specified UDP port number are forwarded to the configured relay. The IP address of the server defined for forwarding for the interface and UDP service.
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Note - To enable IP Broadcast Helper in a cluster, do the configuration on each cluster member.
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Monitoring IP Broadcast Helper
To monitor and troubleshoot IP Broadcast Helper in the WebUI:
- Open the page of the WebUI.
- Click the tab.
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Note - The page is static. To see the latest values, click .
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To monitor and troubleshoot IP Broadcast Helper in clish:
show iphelper services
show iphelper stats
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