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VLAN Concepts
US7070447-001, Rev 01
8-3
Draft Level—Hitachi Confidential
Troubleshooting VLANs
Problem:
Cannot ping a user(s) on a different VLAN.
Solution:
Verify the following:
Verify that the port(s) the user(s) is connected to has the correct
VLAN number(s) assigned to it.
/VLAN/SHOW >vlan
Verify that you can ping the switch itself. By default, the switch is
not pre-configured with an IP address. Therefore, you must enable IP
and assign an address to it.
/VLAN/CONFIG >modify <vlan#>
/VLAN/CONFIG >create <vlan#>
Verify that the user endstation(s) and the VLAN(s) on the switch are
using the same subnet masks.
/VLAN/SHOW >vrouter
Verify that the gateway IP address(es) on the endstation(s) points to
the IP address of the VLAN(s) it is connected to.
Check the ARP table on the switch to verify if the switch is learning
the endstation(s) address(es).
/INET/SHOW >ARP
Check the Routing table on the switch to verify that all networks are
learned.
/INET/SHOW >route
Check the Forwarding table to verify the correct MAC addresses are
learned.
/VBRIDGE/SHOW >vfwt
Ping from the switch to the end nodes.
Ensure that RIP is active per VLAN.
/VLAN/CONFIG >modify <vlan#>