Brocade Communications Systems Brocade ICX 6650 - Manual (Page 39)

Brocade ICX 6650 Administration Guide 21
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Specifying an SNTP server
2
The authentication-key option allows you to configure an authentication key for communication
with the SNTP server. When the authentication key is configured for an SNTP client, it is used only
for an SNTP unicast client. You must assign a unique server <key-ID> and pre-share <key-string>.
The <key-ID> and pre-share <key-string> are used together to create the MD5 checksum. The MD5
checksum is used for authentication for request and reply messages with the SNTP server. The
<key-ID> is the symmetric key shared with the upstream server, and accepts values from 1 to
4,294,967,295. The <key-string> is the authentication string itself, and can take up to 16
characters. If the <key-string> variable consists of only numerical characters, you must enclose the
numerical characters in double quotes.
Modification of the authentication key fields is not supported. To change the key ID or key string,
remove the time server using the no sntp server... command, then reconfigure the server with the
new key.
By default, the Brocade device polls its SNTP server every 30 minutes (1800 seconds). To
configure the Brocade device to poll for clock updates from a SNTP server every 15 minutes, enter
the following.
Brocade(config)# sntp poll-interval 900
Syntax: [no] sntp poll-interval <16-131072>
To display information about SNTP associations, enter the show sntp associations command.
Syntax: show sntp associations
The following table describes the information displayed by the show sntp associations command.
TABLE 5 Output from the show sntp associations command
Field Description
(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 reference clock, or the reference ID of the
external clock source if the peer is stratum 1.
Examples of external clock source IDs: GPS, CDMA, WWV (Ft.Collins US
Radio 2.5, 5, 10, 15 MHz), CESM (calibrated Cesium clock), etc.
st NTP stratum level of the peer
when Amount of time since the last NTP packet was received from the peer. A
negative number indicates the system has never received any
synchronization message from the specified server.
poll The poll interval of the peer relative to the server.
delay The total delay time in milliseconds along the path to the root clock.
disp The dispersion of the root path in milliseconds.
Brocade# show sntp associations
address ref clock st when poll delay disp
~10.95.6.102 0.0.0.0 16 202 4 0.0 5.45
~10.95.6.101 0.0.0.0 16 202 0 0.0 0.0
* synced, ~ configured