Technical data

30 FastIron Ethernet Switch Administration Guide
53-1002637-02
Network Time Protocol Version 4 (NTPv4)
2
If the serve keyword is specified, then NTP will not serve the time to downstream devices. The serve
keyword disables the NTP server mode functionalities. If the serve keyword is not specified, then
both NTP client mode and NTP server mode functionalities are disabled.
Use the no form of the command to enable NTP client and server mode. To enable the client mode,
use the no disable command. To enable the client and server mode, use the no disable serve
command. The no disable command enables both client and server, if the client is already enabled
and server is disabled at that time “no disable server ” enables the server.
NOTE
The disable command disables the NTP server and client mode; it does not remove the NTP
configuration.
Enabling NTP authentication
To enable Network Time Protocol (NTP) strict authentication, use the authenticate command. To
disable the function, use the no form of this command.
By default, authentication is disabled.
Brocade(config-ntp)# [no] authenticate
Syntax: [no] authenticate
Defining an authentication key
To define an authentication key for Network Time Protocol (NTP), use the authentication-key
command. To remove the authentication key for NTP, use the no form of this command.
By default, authentication keys are not configured.
Brocade(config-ntp)# authentication-key key-id 1 md5 moof
Syntax: [no] authentication-key key-id md5 key-string
The valid key-id parameter is 1 to 65535.
MD5 is the message authentication support that is provided using the Message Digest 5 Algorithm.
The key type md5 is currently the only key type supported.
The key-string option is the value of the MD5 key. The maximum length of the key string may be
defined up to 16 characters. Up to 32 keys may be defined.
Specifying a source interface
When the system sends an NTP packet, the source IP address is normally set to the address of the
interface through which the NTP packet is sent. Use the source-interface command to configure a
specific interface from which the IP source address will be taken. To remove the specified source
address, use the no form of this command.
This interface will be used for the source address for all packets sent to all destinations. If a source
address is to be used for a specific association, use the source keyword in the peer or server
command.
NOTE
If the source-interface is not configured, then the lowest IP address in the outgoing interface will be
used in the NTP packets. Source IP address of a tunnel interface is not supported.