Forbidding Specified Ip Addresses To Be Automatically Assigned - 3Com 8800 Configuration Manual

3Com Switch 8800 Configuration Guide
Caution:
A binding in a VLAN interface address pool cannot be overwritten directly. If an
IP-to-MAC address binding entry is configured and you want to modify it, you must
remove it and redefine a new one.
III. Configuring dynamic IP address assignment
If you specify to assign IP addresses dynamically, that is, IP addresses are leased
permanently or temporarily, you need to configure an available address range.
Perform the following configuration in DHCP address pool view.
Table 13-8 Configure an address range for dynamic IP address assignment
Configure an address range for dynamic
IP address assignment
Remove
address range
By default, no IP address range is configured for dynamic IP address assignment.
Each DHCP address pool can be configured with only one address range. If you
execute the network command multiple times, then only the last configured address
range works.

13.3.3 Forbidding Specified IP Addresses to Be Automatically Assigned

You can use the command here to prevent a DHCP server from assigning IP addresses
that are already occupied by such network devices as gateways and file transfer
protocol (FTP) servers to other DHCP clients to avoid IP address conflicts.
Perform the following configuration in system view.
Table 13-9 Forbid specified IP addresses to be automatically assigned
Forbid specified IP addresses to be
automatically assigned
Cancel the forbiddance
All IP addresses in a DHCP address pool can be automatically assigned by default.
Operation
an dynamic assignment
Operation
13-9
Chapter 13 DHCP Configuration
Command
network ip-address [ mask netmask ]
undo network
Command
dhcp server
low-ip-address [ high-ip-address ]
undo dhcp server
low-ip-address [ high-ip-address ]
forbidden-ip
forbidden-ip