xStack DES-6500 Modular Layer 3 Chassis Ethernet Switch User Manual
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 consult 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- 165. 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- 166. DHCP/
BOOTP Relay Global Settings window
The following fields can be set:
Parameter
Description
DHCP/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
DHCP/ Bootp Hops
Count Limit
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
.
DHCP/Bootp Relay
Time Threshold
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.
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