Configuring The Sntp Mode - Cisco 500 Series Administration Manual

Administration: Time Settings
Configuring System Time
STEP 6
STEP 1
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STEP 3
Cisco 500 Series Stackable Managed Switch Administration Guide
is a secondary server, and so forth. If the primary server is down, the device
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.)
Click Apply. The STNP server is added, and you are returned to the main page.

Configuring the SNTP Mode

The device can be in active and/or passive mode (see
information).
To enable receiving SNTP packets from all servers on the subnet and/or to enable
transmitting time requests to SNTP servers:
Click Administration > Time Settings > SNTP Multicast/Anycast.
Select from the following options:
• SNTP IPv4 Multicast Client Mode (Client Broadcast Reception)—Select to
receive system time IPv4 Multicast transmissions from any SNTP server on
the subnet.
• SNTP IPv6 Multicast Client Mode (Client Broadcast Reception)—Select to
receive system time IPv6 Multicast transmissions from any SNTP server on
the subnet.
• SNTP IPv4 Anycast Client Mode (Client Broadcast Transmission)—Select to
transmit SNTP IPv4 synchronization packets requesting system time
information. The packets are transmitted to all SNTP servers on the subnet.
• SNTP IPv6 Anycast Client Mode (Client Broadcast Transmission)—Select to
transmit SNTP IPv6 synchronization packets requesting system time
information. The packets are transmitted to all SNTP servers on the subnet.
If the system is in Layer 3 system mode, click Add to select the interface for SNTP
reception/transmission.
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SNTP Modes for more
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