3Com 10014299 Configure IP address for the subinterface, Configure Vlan information of LAN Switch

332CHAPTER 21: CONFIGURING IP APPLICATION

[Router] interface ethernet 0.1

bSpecify 3 as the ID number of the VLAN on which the subinterface is located.

[Router-Ethernet0.1] vlan-type dot1q vid 3

cConfigure IP address for the subinterface.

[Router-Ethernet0.1]ip address 3.3.3.8 255.255.255.224

dCreate and enter the view of Ethernet subinterface Ethernet0.2.

[Router] interface ethernet 0.2

eSpecify 4 as the ID number of the VLAN on which the subinterface is located.

[Router-Ethernet0.2] vlan-type dot1q vid 4

fConfigure IP address for the subinterface.

[Router-Ethernet0.2]ip address 3.3.3.55 255.255.255.224

2Configure LAN Switch:

aConfigure the port information of LAN Switch

Port :
Port1 :		default	Vlan id :		3	port type: untagged
Port2	:	default	Vlan	id :	4	port	type: untagged
Port3	:	default	Vlan	id :	0	port	type: tagged

bConfigure VLAN information of LAN Switch.

Vlan :
Unknown		Vlan :Discard
Vlan index :			0
Vlan id		:	003
Including		ports:
Port 1 :		'YES'
Port 2 :		'NO'
Port 3 :		'YES'
Unknown		Vlan :Discard
Vlan index :			1
Vlan id		:	004
Including		ports:
Port 1	:	'NO'
Port 2	:	'YES'
Port 3	:	'YES'

Fault Diagnosis and

Troubleshooting of

VLAN

Fault: Ping the IP address of the Ethernet subinterface in the same VLAN from a PC, but fails.

Troubleshooting: The steps below can be taken.

■Use display interface ethernet 0.1 command or display interface ethernet 0.2 command to ensure that the physical interface of this

subinterface and the protocol are both in state Up. If the configuration is correct, whereas the physical interface and the protocol are both in state of Down, pleased check whether the network cable is correctly connected or not..

■If the physical interface of this subinterface and the protocol are both in state of Up, and the Ping operation still fails, please check whether the LAN Switch configuration is correct. It must be ensured that the default VLAN id of ports connected with router Ethernet interface differs from that of ports connected with PC and the type of all ports must be tagged. However, the type of all ports