Configuration example
Network requirements
As shown in Figure 13, a port in VLAN 1 on a switch is connected to a LAN comprising two segments: 172.16.1.0/24 and 172.16.2.0/24.
To enable the hosts on the two subnets to communicate with the external network through the switch, and to enable the hosts on the two subnets to communicate with each other:
Assign a primary IP address and a secondary IP address to VLAN-interface 1 on the switch.
Set the primary IP address of VLAN-interface 1 as the gateway address of the hosts on subnet 172.16.1.0/24, and the secondary IP address of VLAN-interface 1 as the gateway address of the hosts on subnet 172.16.2.0/24.
Figure 13: Network diagram
Configuration procedure
# Assign a primary IP address and a secondary IP address to VLAN-interface 1.
<Switch> system-view [Switch] interface vlan-interface 1 [Switch-Vlan-interface1] ip address 172.16.1.1 255.255.255.0 [Switch-Vlan-interface1] ip address 172.16.2.1 255.255.255.0 sub
# Set the gateway address to 172.16.1.1 on the hosts attached to subnet 172.16.1.0/24, and to 172.16.2.1 on the hosts attached to subnet 172.16.2.0/24.
# From the switch, ping a host on subnet 172.16.1.0/24 to verify the connectivity.
<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
The output shows that the switch can communicate with the hosts on subnet 172.16.1.0/24.
# From the switch, ping a host on subnet 172.16.2.0/24 to verify the connectivity.
<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
The output shows that the switch can communicate with the hosts on subnet 172.16.2.0/24.
# From a host on subnet 172.16.2.0/24, ping a host on subnet 172.16.1.0/24 to verify the connectivity. Host B can be successfully pinged from Host A.