System Management
Basic System Configuration Guide 381
multicast
Syntax multicast [version version] [key-id key-id]
no multicast
Context config>system>time>ntp
Description This command configures NTP the node to transmit multicast packets on the CPM/CCM MGMT port.
Broadcast and multicast messages can easily be spoofed; authentication is strongly recommended.
The no form of this command removes the multicast address from the configuration.
Parameters version version — Specifies the NTP version number that is generated by this node. This
parameter does not need to be configured when in client mode in which case all three versions
are accepted.
Values 2 to 4
Default 4
key-id key-id — Specifies the configured authentication key and authentication type used by this
version to transmit NTP packets. If this command is omitted from the configuration, packets
are sent unencrypted.
Values 1 to 255
Default None
multicastclient
Syntax multicastclient [authenticate]
no multicastclient
Context config>system>time>ntp
Description This command configures the node to receive multicast NTP messages on the CPM MGMT port. If
multicastclient is not configured, received NTP multicast traffic will be ignored. Use the show
command to view the state of the configuration.
The no construct of this message removes the multicast client for the specified interface from the
configuration.
Parameters authenticate — This optional parameter makes authentication a requirement. If authentication is
required, the authentication key-id received must have been configured in the
authentication-key command, and that key-id type and key value must also match.
ntp-server
Syntax ntp-server [authenticate]
no ntp-server
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