System Management
7750 SR OS Basic System Configuration Guide Page 343
Network Time Protocol Commands
ntp
Syntax [no] ntp
Context config>system>time
Description This command enables the context to configure Network Time Protocol (NTP) and its operation. This
protocol defines a method to accurately distribute and maintain time for network elements.
Furthermore this capability allows for the synchronization of clocks between the various network
elements. Use the no form of the command to stop the execution of NTP and remove its
configuration.
Default none
authentication-check
Syntax [no] authentication-check
Context config>system>time>ntp
Description This command provides the option to skip the rejection of NTP PDUs that do not match the
authentication key-id, type or key requirements. The default behavior when authentication is
configured is to reject all NTP protocol PDUs that have a mismatch in either the authentication key-
id, type or key.
When authentication-check is enabled, NTP PDUs are authenticated on receipt. However,
mismatches cause a counter to be increased, one counter for type and one for key-id, one for type,
value mismatches. These counters are visible in a show command.
The no form of this command allows authentication mismatches to be accepted; the counters however
are maintained.
Default authentication-check — Rejects authentication mismatches.
authentication-key
Syntax authentication-key key-id {key key} [hash | hash2] type {des | message-digest}
no authentication-key key-id
Context config>system>time>ntp
Description This command sets the authentication key-id, type and key used to authenticate NTP PDUs sent to or
received by other network elements participating in the NTP protocol. For authentication to work, the
authentication key-id, type and key value must match.
The no form of the command removes the authentication key.
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