xStack
®
DGS-3600 Series Layer 3 Managed Gigabit Ethernet Switch
DHCP/BOOTP Relay
The DHCP/BOOTP Relay Hops Count Limit allows the maximum number of hops (routers) that the DHCP/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 / BOOTP Relay Global Settings
This table is used to enable and configure DHCP/BOOTP Relay global settings on the Switch.
To view this window, click Administration > DHCP/BOOTP Relay > DHCP/BOOTP Relay Global Settings, as shown
below:
Figure 2- 47. DHCP/ BOOTP Relay Global Settings window
The following fields can be set:
Parameter Description
DHCP/BOOTP Relay
State
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
DHCP/BOOTP Relay
Hops Count Limit (1-
16)
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.
DHCP/BOOTP Relay
Time Threshold (0-
65535)
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.
DHCP Vendor Class
Identifier Option 60
State
This function can enable or disable 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.
DHCP Client Identifier
Option 61 State
This function can enable or disable 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
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