What is NTP master command?

What is NTP master command?

“ntp master” command is used to make the router act as an ntp server with it’s own hardware clock as a source. i.e. not to be used when you have a real ntp server in your network, or when you can sync to a reliable internet source.

How do I check my Nexus NTP status?

To check the status of the NTP server or peer, use the command show ntp peer-status. The * beside the peer address indicates that the NTP has synchronized with the server.

How do I enable NTP on a Cisco router?

To deploy a router as NTP server, following steps are required.

1. Adjust router clock.
2. Configure Loop back interface.
3. Add loopback interface’s network in routing table.
4. Configure NTP Server.
5. Configure active interfaces to act as NTP Server only.

How do I enable NTP authentication?

Associate the specified key with an NTP server. You can associate a non-existing key with an NTP server. To enable NTP authentication, you must configure the key and specify it as a trusted key after associating the key with the NTP server.

Can router be used as NTP server?

When no authoritative time sources are available, and you still need to synchronize clocks throughout a network, you can configure a router to act as an NTP master server. NTP provides two important services, accurate time setting and clock synchronization.

What are NTP peers?

NTP Peers. NTP allows you to create a peer relationship between two networking devices. A peer can provide time on its own or connect to an NTP server. If both the local device and the remote peer point to different NTP servers, your NTP service is more reliable.

Can I use router as NTP server?

When no authoritative time sources are available, and you still need to synchronize clocks throughout a network, you can configure a router to act as an NTP master server.

Is NTP a UDP?

NTP is a built-on UDP, where port 123 is used for NTP server communication and NTP clients use port 1023 (for example, a desktop).

What is NTP authentication Cisco?

People often confuse authentication with encryption. Cisco fully supports NTP authentication defined in RFC 1305. NTP authentication ensures that NTP associations synchronize time only to known and trusted NTP servers. This prevents servers from masquerading as legitimate timeservers …

Is there a NTP configuration for the Cisco Nexus 7000?

This document provides a sample configuration for Network Time Protocol (NTP) on Cisco Nexus 7000 Series Switches. Ensure that you meet these requirements before you attempt this configuration: The information in this document is based on the Nexus 7000 Series Switch.

How many NTP instances can Cisco NX-OS support?

If you are running Cisco NX-OS Release 5.2 or later, multiple instances of NTP are supported, one instance per VDC. By default, Cisco NX-OS places you in the default VDC unless you specifically configure another VDC. Only one VDC (the default VDC by default) synchronizes the system clock at any given time.

How does a multi-VDC Nexus 7000 switch work?

On a multi-VDC Nexus 7000 switch, the hardware clock is synchronized in the default VDC, and a nondefault VDC can get the timing update from the default VDC. The nondefault VDC also acts as the server for other clients in the network after the ntp master command is configured under the VDC.

Which is virtual routing and forwarding instances does NTP recognize?

NTP recognizes virtual routing and forwarding (VRF) instances. NTP uses the default VRF if you do not configure a specific VRF for the NTP server and NTP peer. See the Cisco Nexus 7000 Series NX-OS Unicast Routing Configuration Guide for more information about VRFs.