Zyxel VES-1616FE-55A [174/318] Chapter 26 dhcp relay

Zyxel VES-1616FE-55A [174/318] Chapter 26 dhcp relay
Chapter 26 DHCP Relay
VES-1616FE-55A User’s Guide
174
Active Server This field has no effect if the Relay Mode is Both. If the Relay Mode is Auto,
select which DHCP server (the primary one or the secondary one) to which the
VES-1616FE-55A should relay DHCP requests for the selected VLAN.
Apply Click Apply to save your changes to the VES-1616FE-55A’s volatile memory.
The VES-1616FE-55A loses these changes if it is turned off or loses power, so
use the Config Save link on the navigation panel to save your changes to the
non-volatile memory when you are done configuring.
Cancel Click Cancel to begin configuring this screen afresh.
Server List This section lists the current DHCP relay settings for each VLAN. An asterisk in
parentheses (*) indicates which DHCP server is active for each VLAN.
VID This field displays the ID of the VLAN served by the specified DHCP relay(s).
Active This field displays whether or not the VES-1616FE-55A relays DHCP requests
in the selected VLAN to a DHCP server and the server’s responses back to the
clients.
Primary Server IP This field displays the IP address of one DHCP server to which the switch
should relay DHCP requests. If this is the active server for the selected VLAN, it
is marked with an asterisk (*).
Secondary Server
IP
This field displays the IP address of a second DHCP server to which the switch
should relay DHCP requests. This field is 0.0.0.0 if the primary server is the only
DHCP relay. If this is the active server for the selected VLAN, it is marked with
an asterisk (*).
Relay Mode This field displays how the VES-1616FE-55A relays DHCP requests for the
selected VLAN.
Auto - The VES-1616FE-55A routes DHCP requests to the active server for the
VLAN.
Both - The VES-1616FE-55A routes DHCP requests to the primary and
secondary server for the VLAN, regardless of which one is active.
Option Mode This field displays which format (Private or TR101) the VES-1616FE-55A uses
to add DHCP relay agent information to DHCP requests.
Option82 Sub-
option1
This field displays whether or not the VES-1616FE-55A adds the originating port
numbers (and any additional information) to DHCP requests in the selected
VLAN.
Option82 Sub-
option2
This field displays whether or not the VES-1616FE-55A adds the sub-option 2
(and any additional information) to DHCP requests in the selected VLAN.
Delete Select the check box next to the VLAN ID, and click Delete to remove the entry.
Select All Click this to select all entries in the Server List.
Select None Click this to un-select all entries in the Server List.
Table 61 DHCP Relay (continued)
LABEL DESCRIPTION

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