508 CHAPTER 12: USING SYSTEM MANAGEMENT COMMANDS
Description
Use the ntp-service multicast-client command to configure the NTP
multicast client mode. Use the
undo ntp-service multicast-client command
to disable the NTP multicast client mode.
By default, the multicast client service is disabled.
ip-address
defaults to
224.0.1.1.
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 packet, 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 according to the arrived multicast
message.
Example
Configure to receive NTP multicast packet via Vlan-Interface1 and the multicast
group corresponding to these packets located at 224.0.1.1.
<SW5500>system-view
System View: return to User View with Ctrl+Z.
[SW5500]interface vlan-interface 1
[SW5500-Vlan-Interface1]ntp-service multicast-client 224.0.1.1
ntp-service
multicast-server
Syntax
ntp-service multicast-server [
ip-address
] [ authentication-keyid
keyid
] [ ttl
ttl-number
] [ version
number
]*
undo ntp-service multicast-server [
ip-address
]
View
VLAN interface view
Parameter
ip-address
: Specify a multicast IP address of Class D and default to 224.0.1.1.
authentication-keyid: Specify authentication key.
keyid
: Key ID used in multicast, ranging from 1 to 4294967295.
ttl: Define the time to live of a multicast packet.
ttl-number
: Specify the ttl of a multicast packet and range from 1 to 255.
version: Define NTP version number.
number
: Specify NTP version number and range from 1 to 3.
Description
Use the ntp-service multicast-server command to configure NTP multicast
server mode. Use the
undo ntp-service multicast-server command to disable
NTP multicast server mode.
By default, the multicast service is disabled. IP address defaults to 224.0.1.1 and
the version number defaults to 3.
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