Basic System Configuration Guide System Management
Edition: 01 3HE 11010 AAAC TQZZA 355
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 n/a
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, one for key ID, and 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.
Default n/a
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