Technical data

IronWare Software Release 07.2.02j for Brocade FastIron switches
Release Notes v 1.0 Page 11 of 79
To identify an SNTP server with IP address 208.99.8.95 to act as the clock reference for a Brocade
device, enter the following.
Brocade(config)# sntp server 208.99.8.95
Syntax: [no] sntp server { <ip-address> | <hostname> | ipv6 <ipv6-address> } [<sntp-version>] [
authentication-key <key-ID> <key-string>]
The <sntp-version> parameter specifies the SNTP version the server is running and can be from 1 – 4.
The default is 4. The SNTP version is automatically set to 4, unless a different SNTP version is specified in
the device startup configuration. You can configure up to three SNTP servers by entering three separate
sntp server commands.
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.
To specify an IPv6 address for the SNTP server, use the ipv6 option.
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.
Brocade# show sntp associations
address ref clock st when poll delay disp
~207.95.6.102 0.0.0.0 16 202 4 0.0 5.45
~207.95.6.101 0.0.0.0 16 202 0 0.0 0.0
* synced, ~ configured
Syntax: show sntp associations