Chapter 43 DHCP
GS3700/XGS3700 Series User’s Guide
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The following table describes the labels in this screen.
43.8 DHCPv6 Prefix Delegation
Prefix delegation enables an IPv6 device to use the received IPv6 prefix (for example, ‘2001: db2: : /
48’) to generate its IP address. The Switch passes the the IPv6 prefix information to its connected
hosts (according to VLAN) so that they can generate their IPv6 addresses.
Use this screen to configure DHCPv6 client and IPv6 prefix settings for a specific VLAN on the
Switch. Click I P Application > DHCP > DHCPv6 > Prefix Delegation in the navigation panel to
display the screen as shown.
Table 212 IP Application > DHCP > DHCPv6 > Information
LABEL DESCRIPTION
Active Select this check box to enable the Switch to get DHCPv6 and DNS server settings.
VID Enter the ID number of the VLAN to which the DHCPv6 server belongs here.
Refresh Time Enter the number of seconds a DHCPv6 client should wait before refreshing information
retrieved from a DHCPv6 server. The allowed range is 600 to 4294967295 seconds.
DNS Server Specify the IPv6 address of the DNS server for the DHCP clients to use here.
An 128-bit IPv6 address is written as eight 16-bit hexadecimal blocks separated by colons
(: ). This is an example IPv6 address ‘2001:0db8: 1a2b:0015:0000:0000:1a2f:0000’.
IPv6 addresses can be abbreviated in two ways:
• Leading zeros in a block can be omitted. So
‘2001: 0db8: 1a2b:0015:0000:0000:1a2f:0000’ can be written as
‘2001:db8: 1a2b:15: 0:0:1a2f: 0’.
• Any number of consecutive blocks of zeros can be replaced by a double colon. A double
colon can only appear once in an IPv6 address. So
‘2001: 0db8: 0000:0000:1a2f: 0000:0000:0015’ can be written as
‘2001: 0db8: : 1a2f: 0000:0000: 0015’, ‘2001: 0db8: 0000:0000: 1a2f: : 0015’,
‘2001: db8:: 1a2f:0:0: 15’ or ‘2001: db8: 0:0:1a2f:: 15’.
Add Click this to create a new entry or to update an existing one.
This saves your changes to the Switch’s run-time memory. The Switch loses these changes if
it is turned off or loses power, so use the Save link on the top navigation panel to save your
changes to the non-volatile memory when you are done configuring.
Cancel Click Cancel to reset the fields to their last saved values.
Clear Click Clear to reset the fields to the factory defaults.
Index This field displays a sequential number for each entry. Click an index number to change its
settings.
Active This field displays whether the DHCPv6 is activated or not.
VID This field displays the ID number of the VLAN to which the DHCPv6 server belongs.
Refresh Time This field displays the number of seconds a DHCPv6 client should wait before refreshing
information retrieved from a DHCPv6 server. It displays disable if Refresh Time is not
configured.
DNS Server This field displays the IPv6 address of the DNS server that the DHCP clients will use. It
displays disable when it is not configured.
Select an entry’s check box to select a specific entry. Otherwise, select the check box in the
table heading row to select all entries.
Delete Check the entry(ies) that you want to remove and then click the Delete button.
Cancel Click Cancel to clear the selected checkbox(es).
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