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338 CHAPTER 11: SYSTEM MANAGEMENT
This command can only be configured on the interface where the NTP multicast
packet is transmitted.
Configuring NTP Multicast Client Mode Designate an interface on the local
switch to receive NTP multicast messages and operate in multicast client mode.
The local switch listens to the multicast from the server. When it receives the first
multicast packets, it starts a brief client/server mode to switch messages with a
remote server for estimating the network delay. Thereafter, the local switch enters
multicast client mode and continues listening to the multicast and synchronizes
the local clock by the arrived multicast message.
Perform the following configurations in VLAN interface view.
Multicast IP address ip-address defaults to 224.0.1.1. This command can only be
configured on the interface where the NTP multicast packets is received.
Configuring NTP ID Authentication
Enable NTP authentication, set the MD5 authentication key, and specify the
reliable key. A client will synchronize itself by a server only if the server can provide
a reliable key.
Perform the following configurations in system view.
Setting the NTP Authentication Key
This configuration task sets the NTP authentication key.
Perform the following configurations in system view.
Key number number ranges from 1 to 4294967295; the key value contains 1 to
32 ASCII characters.
Setting the Specified Key to Be Reliable
This configuration task is to set the specified key as reliable.
Table 69 Configuring NTP Multicast Client Mode
Operation Command
Configure NTP multicast client mode ntp-service multicast-client [ ip-address ]
Cancel NTP multicast client mode undo ntp-service multicast-client
Table 70 Configuring NTP Authentication
Operation Command
Enable NTP authentication ntp-service authentication enable
Disable NTP authentication undo ntp-service authentication enable
Table 71 Configuring the NTP Authentication Key
Operation Command
Configure the NTP authentication key ntp-service authentication-keyid number
authentication-mode md5 value
Remove the NTP authentication key undo ntp-service authentication-keyid
number