Command Reference Guide

3Com Router 5000 Family and Router 6000 Family ntp-service multicast-server ● 245
Command Reference
ntp-service multicast-server
Purpose Use the ntp-service multicast-server command to configure NTP multicast
server mode.
Use the undo ntp-service multicast-server command to cancel NTP
multicast server mode.
Syntax ntp-service multicast-server [ X.X.X.X ] [ authentication-keyid keyid |
ttl ttl-number | version number ] *
undo ntp-service multicast-server [ X.X.X.X ]
Parameters X.X.X.X
Multicast IP address, a class D address. The default
address is 224.0.1.1.
authentication-keyid
Specifies the ID authentication key.
keyid
Key ID used when transmitting messages to the
multicast clients. Valid values are 1 to 4294967295.
ttl
Lifetime of multicast packets.
ttl-number
Lifetime of multicast packets. Valid values are 1 to 255.
version
Specifies an NTP version.
number
NTP version number. Valid values are 1 to 3.
Default By default, multicast service is not configured, the IP address is 224.0.1.1 and NTP
version 3 is used.
Example Configure Ethernet 1/0/0 to transmit NTP multicast messages. Set the multicast
address to 224.0.1.1, encryption key ID to four and NTP version to three.
[3Com] interface ethernet 1/0/0
[3Com-Ethernet1/0/0] ntp-service multicast-server 224.0.1.1
authentication-keyid 4 version 3
View This command can be used in the following views:
■ Interface view
Description This command specifies the interface to transmit NTP multicast packets. In multicast
server mode, the local device operates as a multicast server to transmit multicast
messages periodically to the multicast clients.