D-Link TM DES-6500, Manual

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DES-6500 Chassis-based Layer 3 Ethernet Switch Manual
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DHCP / BOOTP Relay
The BOOTP hops count limit allows the maximum number of hops (routers) that the BOOTP messages can be relayed
through to be set. If a packet’s hop count is more than the hop count limit, the packet is dropped. The range is between
1
and 16 hops, with a default value of 4 . The relay time threshold sets the minimum time (in seconds) that the Switch will
wait before forwarding a BOOTREQUEST packet. If the value in the seconds field of the packet is less than the relay time
threshold, the packet will be dropped. The range is between
0 and 65,536 seconds, with a default value of 0 seconds.
DHCP Auto Configuration Settings
This window is used to enable the DHCP Autoconfiguration feature on the Switch. When enabled, the Switch is instructed
to receive a configuration file from a TFTP server, which will set the Switch to become a DHCP client automatically on
boot up. To employ this method, the DHCP server must be set up to deliver the TFTP server Ip address and configuration
file name information in the DHCP reply packet. The TFTP server must be up and running and hold the necessary
configuration file stored in its base directory when the request is received from the Switch. For more information about
loading a configuration file for use by a client, see the DHCP server and/or TFTP server software instructions. The user
may also cunsult the Upload screen description located in the Maintenance section of this manual.
If the Switch is unable to complete the DHCP auto configuration, the previously saved configuration file present in the
Switch’s memory will be used.
Figure 6- 151. DHCP Auto Configuration Settings window
To enable the DHCP Auto Configuration State , use the pull-down menu to choose Enable and click the Apply button.
DHCP / BOOTP Relay Information
To enable and configure BOOTP or DHCP on the Switch, click Configuration > DHCP/BOOTP Relay >
DHCP/BOOTP Relay Information :
Figure 6- 152. DHCP/ BOOTP Relay Global Settings window
The following fields can be set:
Parameter Description
BOOTP Relay Status This field can be toggled between Enabled and Disabled using the pull-down menu.
It is used to enable or disable the BOOTP/DHCP Relay service on the Switch. The
default is
Disabled
Hops This field allows an entry between 1 and 16 to define the maximum number of router
hops BOOTP messages can be forwarded across. The default hop count is 4 .
Time Allows an entry between 0 and 65535 seconds, and defines the maximum time limit
for routing a BOOTP/DHCP packet. If a value of 0 is entered, the Switch will not
process the value in the seconds field of the BOOTP or DHCP packet. If a non-zero
value is entered, the Switch will use that value, along with the hop count to determine
whether to forward a given BOOTP or DHCP packet.