Chapter 16
| IP Services
Forwarding UDP Service Requests
– 662 –
â—† The UDP packets to be forwarded must be specified in the IP Service > UDP
Helper > Forwarding page, and the packets meet the following criteria:
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The MAC address of the received frame must be the all-ones broadcast
address (ffff.ffff.ffff).
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The IP destination address must be one of the following:
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all-ones broadcast (255.255.255.255)
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subnet broadcast for the receiving interface
â–
The IP time-to-live (TTL) value must be at least 2.
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The IP protocol must be UDP (17).
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The UDP destination port must be TFTP, Domain Name System (DNS), Time,
NetBIOS, BOOTP or DHCP packet, or a UDP port specified on the
IP Service > UDP Helper > Forwarding page.
â—† If a helper address is specified on this configuration page, but no UDP ports
have been specified on the IP Service > UDP Helper > Forwarding page,
broadcast traffic for several UDP protocol types will be forwarded by default as
described on page 660.
Parameters
These parameters are displayed:
◆ VLAN ID – VLAN identifier (Range: 1-4094)
◆ IP Address – Host address or directed broadcast address to which UDP
broadcast packets are forwarded. (Range: 1-65535)
Web Interface
To specify the target server or subnet for forwarding UDP request packets:
1. Click IP Service, UDP Helper, Address.
2. Select Add from the Action list.
3. Enter the address of the remote server or subnet where UDP request packets
are to be forwarded.
4. Click Apply.
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