ZyXEL Communications MSC1000G Series, Руководство пользователя

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Chapter 4 Access Control List Screens
Management Switch Card User’s Guide
85
Suboption2
Enable Select this option to have the MSC add the sub-option 2 (Remote ID) to the client DHCP
requests for this VLAN.
Suboption2 Info Use this field to specify up to 23 English keyboard characters of additional information for
the MSC to add to the DHCP requests that it relays to a DHCP server.
This field is configurable only when you select Sub-option2 Enable .
Primary/
Secondary Server
IP Enter the IP addresses of the remote DHCP servers to which the switch should relay DHCP
requests.
Relay Mode Select Auto to have the system send DHCP requests to the active DHCP server first. If the
active DHCP server does not respond, the system sends the DHCP request to the other
DHCP server which then becomes the active DHCP server.
Select Both to have the switch send DHCP requests to both the primary and secondary
DHCP servers.
Active Server Specify to which DHCP server ( Primary or Secondary ) the system is to forward this
VLAN’s DHCP request first.
Apply Click Apply to save the changes in this screen to the system’s volatile memory. The
system loses these changes if it is turned off or loses power, so use the Config Save link
on the navigation panel and then the Save button to save your changes to the non-
volatile memory when you are done configuring.
New Click New to create a new DHCP relay entry.
Cancel Click Cancel to begin configuring this screen afresh.
Delimiter
Enter a number (0~255) as the delimiter used to separate the option 82 information, slot
ID, port number and/or VLAN ID from each other.
Option82 Check
Enable
Select this to have the MSC add the slot number, port number and VLAN ID to DHCP
requests that it broadcasts to the DHCP VLAN, if specified, or VLAN. You can specify the
DHCP VLAN in the
DHCP Snooping Configure screen. See Section 26.5 on page 257 .
Apply Click Apply to save the changes in this screen to the system’s volatile memory. The
system loses these changes if it is turned off or loses power, so use the Config Save link
on the navigation panel and then the Save button to save your changes to the non-
volatile memory when you are done configuring.
Index This is the index number of an entry.
VID This is the ID number of the VLAN group.
Mode This field displays whether the DHCP relay setting is activated or not.
Option82 Info This field displays the sub-option 1 information to add to the DHCP request packets.
Suboption2 This field displays whether information (configured in the Sub-option 2 Info field) will be
included in the client DHCP requests for this VLAN or not ( V for enabled, - for disabled).
Server IP This is the IP address of the primary/secondary DHCP server.
An asterisk in parentheses (*) indicates which DHCP server is active for each VLAN.
Relay This field displays the DHCP relay mode.
Select Select an entry’s Select check box and click Delete to remove the entry or click Modify
to edit the entry.
Modify Click Modify to change the settings of the selected entry.
Delete Click Delete to remove the selected entries.
Table 16
DHCP Relay (continued)
LABEL DESCRIPTION