D-Link DI-1750 Reference Manual page 150

ip address ip-address mask
(00)access-group
(01)address
(02)beigrp
......
Please Input the code of command to be excute(0-18): 1
Input 1，select address option, prompt is as below：
(00)A.B.C.D
(01)negotiated
Please Input the code of command to be excute(0-1): 0
Input 0，select A.B.C.D option, prompt is as below：
Please input a IP Address:
Input the primary IP address you want to assign, and the prompt will request inputting mask:
Please input a IP Address:
Input mask, prompt:
(00)secondary
(01)<cr>
Please Input the code of command to be excute(0-1): 1
Input 1, thus you have complete the configuration of primary IP address.
A mask identifies the network section in an IP address.
Note:
We only support network masks ordered by network octet and continuously set beginning from the tiptop bit.
Other additional and optional tasks will be introduced in the following sections:
♦ Assign Multiple IP Addresses to a Network Interface
♦ Enable IP Processing on a Serial Interface
2. Assign Multiple IP Addresses to a Network Interface
Each interface can own multiple IP addresses, including one primary IP address and arbitrary amount
of secondary IP addresses. In the following cases you should configure secondary IP address:
There might not be enough host addresses for a particular network segment. For example, a logical
subnet has up to 254 valid IP addresses, but in factual application maybe 300 hosts are required to
connect in. In this case you can make two logical subnets use a same physical subnet through
configuring secondary IP address on your router or your access server.
Some early networks are based on Level2 bridge, but not be split into multiple subnets. Judicious use
of secondary address can rebuild a network like such into multiple subnets based on routing. Through
secondary IP, a router on a network can acquaint multiple subnets in the same network.
Two subnets of a single network might be separated physically by another network. Here you can make
the network addresses to be secondary IP addresses, so that you can connect two subnets in a logical
network but divided away physically.
Note:
If any router on a network segment uses a secondary address, all other routers on that same segment must also configure
secondary addresses of the same network segment.
To assign multiple IP addresses to a network interface, you should select ip option in configuring
prompt and it will list all arguments:
(00)access-group
(01)address
(02)beigrp
......
Please Input the code of command to be excute(0-18): 1
Command
Specify access control for packets
IP address
Enhanced Interior Gateway Routing Protocol
IP address
IP address negotiated over PPP or via DHCP
Make this IP address a secondary address
Specify access control for packets
IP address
Enhanced Interior Gateway Routing Protocol
Model Name
Purpose
Configure master IP address of the interface.
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