D-Link DGS-3427 - xStack Switch - Stackable Product Manual page 70

x Stack
The following fields can be set:
Parameter
DHCP/BOOTP Relay
State
DHCP/BOOTP Relay
Hops Count Limit (1-16)
DHCP/BOOTP Relay
Time Threshold (0-
65535)
DHCP Vendor Class
Identifier Option 60
State
DHCP Client Identifier
Option 61 State
DHCP Relay Agent
Information Option 82
State
®
DGS-3400 Series Layer 2 Gigabit Ethernet M anaged Sw itch
Figure 2 - 61 DHCP/ BOOTP Relay Global Settings window
Description
This field can be toggled between Enabled and Disabled using the pull-down menu. It is
used to enable or disable the DHCP/BOOTP Relay service on the Switch. The default is
Disabled.
This field allows an entry between 1 and 16 to define the maximum number of router
hops DHCP/BOOTP messages can be forwarded across. The default hop count is 4.
Allows an entry between 0 and 65535 seconds, and defines the maximum time limit for
routing a DHCP/BOOTP 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.
This function Enables or Disables the DHCP Vendor class identifier option 60 state.
When option 60 is enabled, if the packet does not have option 60, then the relay servers
cannot be determined based on option 60. The relay servers will be determined based on
either option 60 or per IPIF configured servers. If the relay servers are determined based
on option 60, then the IPIF configured servers will be ignored. If the relay servers are not
determined by option 60 then the IPIF configured servers will be used to determine the
relay servers.
This function Enables or Disables the DHCP Client identifier option 61 state. When option
61 State is enabled, if the packet does not have option 61, then the relay servers cannot
be determined based on option 61. The relay servers will be determined based on option
61 and the IPIF configured servers will be ignored. If the relay servers are not determined
either by option 60 or option 61, then IPIF configured servers will be used to determine
the relay servers.
This field can be toggled between Enabled and Disabled using the pull-down menu. It is
used to enable or disable the DHCP Agent Information Option 82 on the Switch. The
default is Disabled.
Enabled –When this field is toggled to Enabled the relay agent will insert and remove
DHCP relay information (option 82 field) in messages between DHCP servers and clients.
When the relay agent receives the DHCP request, it adds the option 82 information, and
the IP address of the relay agent (if the relay agent is configured), to the packet. Once the
option 82 information has been added to the packet it is sent on to the DHCP server.
When the DHCP server receives the packet, if the server is capable of option 82, it can
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