Example for Configuring Primary and Secondary IP Addresses for an Interface

Networking Requirements

As shown in Figure 1, the Switch has only one idle interface GE0/0/1 to connect to a LAN. The hosts on the LAN are located on two network segments: 172.16.1.0/24 and 172.16.2.0/24. The interface needs to be configured with two IP addresses to provide access for hosts on the two network segments.

Figure 1 Networking diagram for IP addresses configuration

Configuration Roadmap

The configuration roadmap is as follows:

Configure a primary IP address and a secondary IP address for the interface.

Procedure

Add GE0/0/1 to VLAN 100, and configure a primary IP address and a secondary IP address for VLANIF 100.

<HUAWEI> system-view
[HUAWEI] sysname Switch
[Switch] vlan 100
[Switch-vlan100] quit
[Switch] interface gigabitethernet 0/0/1
[Switch-GigabitEthernet0/0/1] port link-type hybrid
[Switch-GigabitEthernet0/0/1] port hybrid pvid vlan 100
[Switch-GigabitEthernet0/0/1] port hybrid untagged vlan 100
[Switch-GigabitEthernet0/0/1] quit
[Switch] interface vlanif 100
[Switch-Vlanif100] ip address 172.16.1.1 24
[Switch-Vlanif100] ip address 172.16.2.1 24 sub
[Switch-Vlanif100] quit
[Switch] quit

Verify the configuration.

# Ping a host on network segment 172.16.1.0 from the switch. The ping operation succeeds.

<Switch> ping 172.16.1.2
  PING 172.16.1.2: 56  data bytes, press CTRL_C to break
    Reply from 172.16.1.2: bytes=56 Sequence=1 ttl=255 time=25 ms
    Reply from 172.16.1.2: bytes=56 Sequence=2 ttl=255 time=27 ms
    Reply from 172.16.1.2: bytes=56 Sequence=3 ttl=255 time=26 ms
    Reply from 172.16.1.2: bytes=56 Sequence=4 ttl=255 time=26 ms
    Reply from 172.16.1.2: bytes=56 Sequence=5 ttl=255 time=26 ms
  --- 172.16.1.2 ping statistics ---
    5 packet(s) transmitted
    5 packet(s) received
    0.00% packet loss
    round-trip min/avg/max = 25/26/27 ms

# Ping a host on network segment 172.16.2.0 from the switch. The ping operation succeeds.

<Switch> ping 172.16.2.2
  PING 172.16.2.2: 56  data bytes, press CTRL_C to break
    Reply from 172.16.2.2: bytes=56 Sequence=1 ttl=255 time=25 ms
    Reply from 172.16.2.2: bytes=56 Sequence=2 ttl=255 time=26 ms
    Reply from 172.16.2.2: bytes=56 Sequence=3 ttl=255 time=26 ms
    Reply from 172.16.2.2: bytes=56 Sequence=4 ttl=255 time=26 ms
    Reply from 172.16.2.2: bytes=56 Sequence=5 ttl=255 time=26 ms
  --- 172.16.2.2 ping statistics ---
    5 packet(s) transmitted
    5 packet(s) received
    0.00% packet loss
    round-trip min/avg/max = 25/25/26 ms

Configuration Files

Switch configuration file

#
sysname Switch
#
vlan batch 100
#
interface Vlanif100
 ip address 172.16.1.1 255.255.255.0
 ip address 172.16.2.1 255.255.255.0 sub
#
interface GigabitEthernet0/0/1
 port link-type hybrid
 port hybrid pvid vlan 100
 port hybrid untagged vlan 100
#
return