D-Link DGS-3630 User Manual 1 - Page 113

DGS-3630 Series Layer 3 Stackable Managed Switch Web UI Reference Guide Parameter Max Poll Prefer Description minimum poll interval that will be used is 64 seconds (26=64). The range is from 3 to 16. Enter the maximum poll value here. This specifies the maximum poll interval for NTP messages. This value is calculated as 2 to the power of the maximum poll interval value specified. For example, if the value specified here is 6, the maximum poll interval that will be used is 64 seconds (26=64). The range is from 4 to 17. Select whether or not this entry will be the preferred peer for synchronization. Options to choose from are True and False. Click the Apply button to accept the changes made. Click the Edit button to re-configure the specific entry. Click the Delete button to delete the specified entry. Enter a page number and click the Go button to navigate to a specific page when multiple pages exist. NTP Access Group Settings This window is used to display and configure the NTP access group settings. The NTP implements a general purpose Access Control List (ACL) containing address/match entries sorted first by increasing address values and then by increasing mask values. A match occurs when the bitwise AND of the mask and the packet source address is equal to the bitwise AND of the mask and address in the list. The list is searched in order with the last match found defining the restriction flags associated with the entry. To view the following window, click Management > NTP > NTP Access Group Settings, as shown below: Figure 4-74 NTP Access Group Settings Window The fields that can be configured are described below: Parameter Default IP Address Netmask IPv6 Address IPv6 Mask Ignore Description Select this option to specify to use the default IPv4 (0.0.0.0/0.0.0.0) or IPv6 (::/::) address. The default IP address is always included with the lowest priority in the list. Select and enter the host IPv4 address here. Enter the IPv4 netmask of the host network here. Select and enter the host IPv6 address here. Enter the IPv6 prefix length of the host network here. Select this option to deny all packets, including NTP control queries. 101