Cisco Nexus 7000 Series Configuration Manual page 95

Configuring NTP
NTP
NTP
NTP
NTP
NTP
NTP
NTP
NTP
NTP
NTP
NTP
NTP access groups
7.3(0)D1(1)
6.2(2)
6.2(2)
6.2(2)
6.2(2)
6.1(1)
6.1(1)
5.2(3)
5.2(1)
5.2(1)
5.2(1)
5.2(1)
Cisco Nexus 7000 Series NX-OS System Management Configuration Guide
Feature History for NTP
Increased the length of NTP
authentication keys from 15 to 32
alphanumeric characters.
Introduced the ntp access-group
match-all command to cause the access
group options to be scanned in order,
from least restrictive to most restrictive.
Introduced the no ntp passive
command to prevent NTP from forming
associations.
Added the ability to configure NTP
broadcast and multicast servers and
multicast clients on an interface.
Added the ability to enable or disable
NTP on an interface.
NTP access group options are now
scanned in order from least restrictive
to most restrictive.
Increased the length of NTP
authentication keys from 8 to 15
alphanumeric characters.
Increased the length of NTP
authentication keys from 8 to 15
alphanumeric characters.
Added NTP support for all VDCs,
enabling them to act as time servers.
Changed the command to enable or
disable NTP from [no] ntp enable to
[no] feature ntp.
Added the ability to configure the
device as an authoritative NTP server,
enabling it to distribute time even when
it is not synchronized to an existing time
server.
Added the serve, serve-only, and
query-only access group options to
control access to additional NTP
services.
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