1-6
Cisco ASA Series CLI Configuration Guide
Chapter 1 Configuring Basic Settings
Setting the Date and Time
Setting the Date and Time Using an NTP Server
To obtain the date and time from an NTP server, perform the following steps :
Detailed Steps
Command
Purpose
Step 1
ntp authenticate
Example:
hostname(config)# ntp
authenticate
Enables authentication with an NTP server.
Step 2
ntp trusted-key
key_id
Example:
hostname(config)# ntp
trusted-key 1
Specifies an authentication key ID to be a trusted key, which is required for
authentication with an NTP server.
The
key_id
argument is a value between 1 and 4294967295. You can enter
multiple trusted keys for use with multiple servers.
Step 3
ntp authentication-key
key_id
md5
key
Example:
hostname(config)# ntp
authentication-key 1 md5
aNiceKey
Sets a key to authenticate with an NTP server.
The
key_id
argument is the ID you set in
using the
ntp trusted-key
command, and the
key
argument is a string up to 32 characters long.
Step 4
ntp server
ip_address
[
key
key_id
] [
source
interface_name
]
[
prefer
]
Example:
hostname(config)# ntp server
10.1.1.1 key 1 prefer
Identifies an NTP server.
The
key_id
argument is the ID you set in
using the
ntp trusted-key
command.
The
source
interface_name
keyword-argument pair identifies the outgoing
interface for NTP packets if you do not want to use the default interface in
the routing table. Because the system does not include any interfaces in
multiple context mode, specify an interface name defined in the admin
context.
The
prefer
keyword sets this NTP server as the preferred server if multiple
servers have similar accuracy. NTP uses an algorithm to determine which
server is the most accurate and synchronizes to that one. If servers are of
similar accuracy, then the
prefer
keyword specifies which of those servers to
use. However, if a server is significantly more accurate than the preferred
one, the ASA uses the more accurate one. For example, the ASA uses a
server of stratum 2 over a server of stratum 3 that is preferred.
You can identify multiple servers; the ASA uses the most accurate server.
Note
In multiple context mode, set the time in the system configuration
only.
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Страница 61: ...P A R T 1 Getting Started with the ASA ...
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Страница 218: ...1 56 Cisco ASA Series CLI Configuration Guide Chapter 1 Managing Feature Licenses Feature History for Licensing ...
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Страница 358: ...1 22 Cisco ASA Series CLI Configuration Guide Chapter 1 Information About Failover Failover Messages ...
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Страница 533: ...P A R T 2 Configuring Objects and Access Lists ...
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Страница 601: ...P A R T 2 Configuring IP Routing ...
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Страница 845: ...P A R T 2 Configuring AAA Servers and the Local Database ...
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Страница 1054: ...1 26 Cisco ASA Series CLI Configuration Guide Chapter 1 Configuring AAA Rules for Network Access Feature History for AAA Rules ...
Страница 1060: ...1 6 Cisco ASA Series CLI Configuration Guide Chapter 1 Configuring Web Cache Services Using WCCP Feature History for WCCP ...
Страница 1061: ...P A R T 2 Configuring Service Policies Using the Modular Policy Framework ...
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Страница 1475: ...P A R T 2 Configuring Modules ...
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