Zyxel IES-1248 EE [213/544] Chapter 29 dhcp relay

Zyxel IES-1248 EE [213/544] Chapter 29 dhcp relay
Chapter 29 DHCP Relay
IES-1248-51/51A/53 User’s Guide
213
Enable Option82
Sub-option2
(Remote ID)
Select this to have the IES-1248 add the sub-option 2 (Remote ID) to DHCP
requests in the selected VLAN regardless of whether the DHCP relay is on or
off. In the field next to the check box, you can also specify up to 23 English
keyboard characters of additional information for the IES-1248 to add to the
DHCP requests to a DHCP server.
Primary Server IP Enter the IP address of one DHCP server to which the switch should relay
DHCP requests for the selected VLAN.
Secondary Server
IP
Enter the IP address of a second DHCP server to which the switch should relay
DHCP requests for the selected VLAN. Enter 0.0.0.0 if there is only one DHCP
relay for the selected VLAN.
Relay Mode Specify how the IES-1248 relays DHCP requests for the selected VLAN.
Auto - The IES-1248 routes DHCP requests to the active server for the VLAN.
Both - The IES-1248 routes DHCP requests to the primary and secondary
server for the VLAN, regardless of which one is active.
Option Mode Select either the Private or TR-101 Option 82 Sub-option 1 and Sub-option 2
format.
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
IES-1248 should relay DHCP requests for the selected VLAN.
Apply Click Apply to save your changes to the IES-1248’s volatile memory. The IES-
1248 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 IES-1248 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 IES-1248 relays DHCP requests for the selected
VLAN.
Auto - The IES-1248 routes DHCP requests to the active server for the VLAN.
Both - The IES-1248 routes DHCP requests to the primary and secondary
server for the VLAN, regardless of which one is active.
Option82 Sub-
option1
This field displays whether or not the IES-1248 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 IES-1248 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.
Table 56 DHCP Relay (continued)
LABEL DESCRIPTION

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