Cisco ASR 14000 Series Management Command Reference page 445

Router system

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NTP Commands on Cisco IOS XR Software

C i s c o C o n f i d e n t i a l - B e t a R e v i e w R 3 . 7. 1

Command History

Release 3.7.1

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper

Use the peer (NTP) command to allow this machine to synchronize with the peer, or conversely.

Although using the prefer keyword can help reduce the switching among peers, you should avoid using

the keyword because it interferes with the source selection mechanism of NTP and can result in a

degradation in performance.

The value for the minpoll keyword must be less than or equal to the value for the maxpoll keyword. If

this is not the case, the system issues an error message.

To provide peer-level service (as opposed to client/server-level service), it may be necessary to explicitly

specify the NTP version for the peer if it is not version 4.

The following example shows how to configure a networking device to allow its system clock to be

synchronized with the clock of the peer (or conversely) at IP address 10.0.0.0 using NTP. The source IP

address is the address of Packet-over-SONET/SDH (POS) interface 0/0/0/1.

RP/0/RP0/CPU0:router(config)# ntp

RP/0/RP0/CPU0:router(config-ntp)# peer 10.0.0.0 minpoll 8 maxpoll 12 source POS 0/0/0/1

Related Commands

authentication-key

server (NTP)

source (NTP)

Modification

This command was introduced on the Cisco ASR 14000 Series Router.

Defines an authentication key for NTP.

Allows the system clock to be synchronized by a time server.

Uses a particular source address in NTP packets.

Cisco ASR 14000 Series Router System Management Command Reference

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