NTP Configuration 361
Tab le 440 Configure NTP Multicast Server Mode
NTP version number
number
ranges from 1 to 3 and defaults to 3; the
authentication key ID
keyid
ranges from 0 to 4294967295;
ttl-number
of the
multicast packets ranges from 1 to 255; and the multicast IP address defaults to
224.0.1.1.
This command can only be configured on the interface where the NTP multicast
packet will be 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.
Tab le 441 Configure NTP multicast client mode
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 will be received.
Configuring NTP ID Authentication
Enable NTP authentication, set 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.
Tab le 442 Configure NTP Authentication
Setting NTP Authentication Key
This configuration task is to set NTP authentication key.
Perform the following configurations in System View.
Operation Command
Configure NTP multicast server
mode
ntp-service multicast-server [
ip-address
] [ authentication-keyid
keyid
] [ ttl
ttl-number
] [ version
number
]
Cancel NTP multicast server mode undo ntp-service multicast-server
Operation Command
Configure NTP multicast client
mode
ntp-service multicast-client [
ip-address
]
Cancel NTP multicast client mode undo ntp-service multicast-client
Operation Command
Enable NTP authentication ntp-service authentication enable
Disable NTP authentication undo ntp-service authentication enable
To Next Page