Assigning Ip Addresses; Assigning Ip Addresses To Interfaces - H3C SecPath F1800-A Operation Manual

Operation Manual - Network and Routing Protocol
H3C SecPath F1800-A Firewall

1.2 Assigning IP Addresses

1.2.1 Assigning IP Addresses to Interfaces

Each interface of a router can have several IP addresses, among which one is the
primary IP address and the others are secondary IP addresses. The primary IP
address and secondary IP addresses can be on the same network segment.
I. Assigning a Primary IP Address to an Interface
Each interface can have only one primary IP address. You can use the following
command to modify the primary IP address of the interface and the network mask.
Do as follows in interface view.
Table 1-2 Assigning a primary IP address to an interface
Assign a primary IP address to an interface.
Use a mask net-mask to identify the network ID contained in an IP address. For
example, the IP address of an Ethernet interface of a router is 129.9.30.42, and the
mask is 255.255.0.0. Multiply the IP address and the mask logically, and then the
network ID of the router's Ethernet interface will be129.9.0.0.
When assigning a primary IP address, if a primary IP address has already existed on
the interface, the original primary IP address will be replaced by the new one.
II. Assigning Secondary IP Addresses to an Interface
Besides the primary IP address, several secondary IP addresses can be assigned on
an interface. Assigning secondary IP addresses aims to have the same interface
located in different sub-nets, so as to create network routes with the same interface as
the output port. As a result, several subnets can be connected through the same
interface.
Do as follows in interface view.
Table 1-3 Assigning secondary IP addresses to an interface
Assign secondary IP addresses to an
interface.
III. Deleting the IP Address of an Interface
Do as follows in interface view.
Action
Action
5-5
Chapter 1 IP Address and IP Performance
Command
ip address ip-address net-mask
Command
ip address ip-address net-mask sub
Configuration