Cisco SR224T Administration Guide - Page 58

System Time Configuring System Time 6 - Global-The IPv6 address is a global Unicast IPV6 type that is visible and reachable from other networks. • Link Local Interface-Select the link local interface (if IPv6 Address Type Link Local is selected) from the list. • SNTP Server IP Address-Enter the SNTP server IP address. The format depends on which address type was selected. • SNTP Server-Select the name of the SNTP server from a list of well-known NTP servers. If other is chosen, enter name of SNTP server in the adjacent field. • Poll Interval-Select to enable polling of the SNTP server for system time information. All NTP servers that are registered for polling are polled, and the clock is selected from the server with the lowest stratum level (distance from the reference clock) that is reachable. The server with the lowest stratum is considered to be the primary server. The server with the next lowest stratum is a secondary server, and so forth. If the primary server is down, the switch polls all servers with the polling setting enabled, and selects a new primary server with the lowest stratum. • Authentication-Select the check box to enable authentication. • Authentication Key ID-If authentication is enabled, select the value of the key ID. (Create the authentication keys using the SNTP Authentication page.) STEP 5 Click Apply. The STNP server is added, and you are returned to the main page. Configuring the SNTP Mode The switch can be in active and/or passive mode (see SNTP Modes for more information). To enable receiving SNTP packets from all servers on the subnet and/or to enable transmitting time requests to SNTP servers: STEP 1 Click Administration > Time Settings > SNTP Multicast/Anycast. The SNTP Multicast/Anycast page opens. STEP 2 Select from the following options: • SNTP Multicast Client Mode (Client Broadcast Reception)-Select to receive system time from any SNTP server on the subnet. Cisco Small Business 200 Series Smart Switch Administration Guide 59