Chapter 9 Network Application; Dhcp; Dhcp Relay - D-Link xStack DES-3200 Series Reference Manual

Chapter 9

DHCP

PPPoE Circuit ID Insertion Settings
SMTP Settings
SNTP
Flash File System Settings
DHCP

DHCP Relay

DHCP Relay Global Settings
This window is used to enable and configure DHCP Relay Global Settings. The relay hops count limit allows the
maximum number of hops (routers) that the DHCP 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 DHCPREQUEST 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 65,535 seconds, with a default value of 0 seconds.
To view this window, click Network Application > DHCP > DHCP Relay > DHCP Relay Global Settings as
shown below:
The fields that can be configured are described below:
Parameter
DHCP Relay State
DHCP Relay Hops
Count Limit (1-16)
DHCP Relay Time
Threshold (0-65535)
DHCP Relay Option 82
State
xStack® DES-3200 Series Layer 2 Managed Fast Ethernet Switch
Network Application
Figure 9-1 DHCP Relay Global Settings window
Description
Use the drop-down menu to enable or disable the DHCP Relay service on the
Switch. The default is Disabled.
Enter an entry between 1 and 16 to define the maximum number of router hops
DHCP messages can be forwarded. The default hop count is 4.
Enter an entry between 0 and 65535 seconds, and defines the maximum time limit
for routing a DHCP packet. If a value of 0 is entered, the Switch will not process the
value in the seconds' field of the 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 DHCP packet.
Use the drop-down menu to enable or disable the DHCP Relay Agent Information
Option 82 on the Switch. The default is Disabled.
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