assigning multiple IP addresses to network interface

Why might we want to assign multiple IP addresses to the same interface? The following are the most common scenarios:

  • hosts in the network segment use IP addresses on different networks
  • there are not enough host addresses on a logical network segment, suppose a /24 address space and 300 hosts

How to configure multiple IP addresses on Huawei devices?

Let’s configure a pair of routers connected via a Gigabit Ethernet link and use four different logical networks.

Assigning multiple IP addresses to network interface on Huawei router

[labnarioR1]int gi 0/0/0
[labnarioR1-GigabitEthernet0/0/0]ip add 192.168.12.1 255.255.255.0
[labnarioR1-GigabitEthernet0/0/0]ip add 10.0.12.1 255.255.255.0 sub
[labnarioR1-GigabitEthernet0/0/0]ip add 10.0.22.1 255.255.255.0 sub
[labnarioR1-GigabitEthernet0/0/0]ip add 10.0.32.1 255.255.255.0 sub

[labnarioR2]int gi 0/0/0
[labnarioR1-GigabitEthernet0/0/0]ip add 192.168.12.2 255.255.255.0
[labnarioR2-GigabitEthernet0/0/0]ip add 10.0.12.2 255.255.255.0 sub
[labnarioR2-GigabitEthernet0/0/0]ip add 10.0.22.2 255.255.255.0 sub
[labnarioR2-GigabitEthernet0/0/0]ip add 10.0.32.2 255.255.255.0 sub

Now ping test can be done to check connectivity:

[labnarioR1-GigabitEthernet0/0/0]ping 192.168.12.2
  PING 192.168.12.2: 56  data bytes, press CTRL_C to break
    Reply from 192.168.12.2: bytes=56 Sequence=1 ttl=255 time=50 ms

[labnarioR1-GigabitEthernet0/0/0]ping 10.0.12.2
  PING 10.0.12.2: 56  data bytes, press CTRL_C to break
    Reply from 10.0.12.2: bytes=56 Sequence=1 ttl=255 time=50 ms

[labnarioR1-GigabitEthernet0/0/0]ping 10.0.22.2
  PING 10.0.22.2: 56  data bytes, press CTRL_C to break
    Reply from 10.0.22.2: bytes=56 Sequence=1 ttl=255 time=50 ms

[labnarioR1-GigabitEthernet0/0/0]ping 10.0.32.2
  PING 10.0.32.2: 56  data bytes, press CTRL_C to break
    Reply from 10.0.32.2: bytes=56 Sequence=1 ttl=255 time=50 ms

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