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282 CHAPTER 11: SYSTEM MANAGEMENT
Perform the following configurations in VLAN interface view.
This command can only be configured on the interface where the NTP broadcast
packets are received.
Configuring NTP Multicast Server Mode Designate an interface on the local
switch to transmit NTP multicast packets. In this case, the local equipment
operates in multicast mode and serves as a multicast server to multicast messages
to its clients regularly.
Perform the following configurations in VLAN interface view.
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 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.
Table 322 Configuring NTP Broadcast Client Mode
Operation Command
Configure NTP broadcast client mode ntp-service broadcast-client
Disable NTP broadcast client mode undo ntp-service broadcast-client
Table 323 Configuring NTP Multicast Server Mode
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
Table 324 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