3Com MSR 50 Series, Руководство по настройке

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Configuring an Address Pool for the DHCP Server 581
n
Specify an IP address for the network calling processor before performing other
configuration.
Configuring the TFTP
Server and Bootfile
Name for the Client
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 autoconfiguration. The request process of the client is
described below:
1
When a router starts up without loading any configuration file, the system sets an
active interface (such as the interface of the default VLAN or a Layer 3 Ethernet
interface) 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.
To configure the IP address and name of the TFTP server and the bootfile name in
the DHCP address pool, use the following commands:
Configuring
Self-Defined DHCP
Options
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.
Specify the failover IP address voice-config fail-over
ip-address dialer-string
Optional
No failover IP address is
specified by default
To do... Use the command... Remarks
To do... Use the command... Remarks
Enter system view system-view -
Enter DHCP address pool view dhcp server ip-pool
pool-name
-
Specify the TFTP server tftp-server ip-address
ip-address
Optional
Not specified by default
Specify the name of the TFTP
server tftp-server domain-name
domain-name
Optional
Not specified by default
Specify the bootfile name bootfile-name
bootfile-name
Optional
Not specified by default