3Com Switch 4800G 24-Port Configuration Manual page 805

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Configuring the TFTP
Server and Bootfile
Name for the Client
Configuring
Self-Defined DHCP
Options
To do...
Specify the failover IP address voice-config fail-over
Specify an IP address for the network calling processor before performing other
configuration.
This task is to specify the IP address and name of a TFTP server and the bootfile
name in the DHCP address pool. The DHCP clients use these parameters to
contact the TFTP server, requesting the configuration file used for system
initialization, which is called auto-configuration. The request process of the client
is described below:
1 When a switch starts up without loading any configuration file, the system sets an
active interface (such as the VLAN interface of the default VLAN) as the DHCP
client to request from the DHCP server parameters such as an IP address and name
of a TFTP server, and the bootfile name.
2 After getting related parameters, the DHCP client will send a TFTP request to
obtain the configuration file from the specified TFTP server for system initialization.
If the client cannot get such parameters, it will perform system initialization
without loading any configuration file.
To implement auto-configuration, you need to specify the IP address and name of
a TFTP server and the bootfile name in the DHCP address pool on the DHCP server,
but you do not need to perform any configuration on the DHCP client.
When option 55 in the requesting client message contains parameters of option
66, option 67, or option 150, the DHCP server will return the IP address and name
of the specified TFTP server, and bootfile name to the client.
Follow these steps to configure the IP address and name of the TFTP server and the
bootfile name in the DHCP address pool:
To do...
Enter system view
Enter DHCP address pool view dhcp server ip-pool
Specify the TFTP server
Specify the name of the TFTP
server
Specify the bootfile name
By configuring self-defined DHCP options, you can
Define new DHCP options. New configuration options will come out with
■
DHCP development. To support these new options, you can add them into the
attribute list of the DHCP server.
Configuring an Address Pool for the DHCP Server
Use the command...
ip-address dialer-string
Use the command...
system-view
pool-name
tftp-server ip-address
ip-address
tftp-server domain-name
domain-name
bootfile-name
bootfile-name
805
Remarks
Optional
No failover IP address is
specified by default.
Remarks
-
-
Optional
Not specified by default.
Optional
Not specified by default.
Optional
Not specified by default.