D-Link xStack DGS-3600 Series User Manual - Dhcp/bootp Relay
xStack DGS-3600 Series Layer 3 Gigabit Ethernet Managed Switch
Host Address
The IP address of the OSPF host.
Metric
A value between
1
and
65535
that will be advertised for the route.
Area ID
A 32-bit number in the form of an IP address (xxx.xxx.xxx.xxx) that uniquely identifies the
OSPF area in the OSPF domain.
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
To enable and configure DHCP/BOOTP Relay global settings on the Switch, click
L3 Features > DHCP/BOOTP Relay
>
DHCP/BOOTP Relay Global Settings
:
Figure 8- 52. DHCP/
BOOTP Relay Global Settings window
The following fields can be set:
Parameter
Description
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
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
.
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 Agent
Information Option 82
State
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
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