Brocade BigIron RX Series Configuration Guide User Manual

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BigIron RX Series Configuration Guide

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Specifying a Simple Network Time Protocol (SNTP) server

You can configure the BigIron RX to consult up to three SNTP servers to establish the current
system time and date. The order in which the SNTP servers are configured is the order in which
they are consulted. The server that was configured first is the first server consulted after the poll
cycle; the next server will be consulted only if a positive ACK is not received from the first one.

NOTE

The device does not retain time and date information across power cycles. Unless you want to
reconfigure the system time counter each time the system is reset, Brocade recommends that you
use the SNTP feature.

To identify an SNTP server with IP address 208.99.8.95 to act as the clock reference for a device,
enter the following.

BigIron RX(config)# sntp server 208.99.8.95

Syntax: sntp server <ip-addr> | <hostname> [<version>]

The <version> parameter specifies the SNTP version the server is running and can be from 1 – 4.
The default is 1. You can configure up to three SNTP servers by entering three separate sntp server
commands.

By default, the device polls its SNTP server every 30 minutes (1800 seconds). To configure the
device to poll for clock updates from a SNTP server every 15 minutes, enter the following.

BigIron RX(config)# sntp poll-interval 900

Syntax: [no] sntp poll-interval <1-65535>

To display information about SNTP associations, enter the following command.

Syntax: show sntp associations

The following table describes the information displayed by the show sntp associations command.

TABLE 43

Output from the show sntp associations command

This field...

Displays...

(leading character)

One or both of the following:
*

Synchronized to this peer

Peer is statically configured

address

IP address of the peer

ref clock

IP address of the peer’s reference clock

NTP stratum level of the peer

when

Amount of time since the last NTP packet was received from the peer

poll

Poll interval in seconds

delay

Round trip delay in milliseconds

disp

Dispersion in seconds

BigIron RX# show sntp associations

address ref clock st when poll delay disp

*~207.95.6.102 216.218.254.202 2 63 1800 0.002 0.039

~207.95.6.101 0.0.0.0 16 -1 1800 0.000 0.000

* synced, ~ configured