We have 3550 switch that is connected to another HP 2524 switch. On the 2524 switch we have several PCs that are on different VLANS. After a power off and on of the 3550, the PC are acting very strange. One might be able to access the Internet but not the Intranet, another may be exactly the opposite but be on the same VLAN. As soon as we remove the 2524 swith and put a hub in place all it well with all PCs on each VLAN. We put in an unmanaged Allied Telesyn switch and the PC act strange again. Below is the configuration of the port the HP or Allied switches are being plugged into.
switchport access vlan dynamic
switchport trunk encap dot1q
switchport trunk native vlan 2
switchport mode trunk
This is the running config on the 3550 is exactly the same as before it was powered off.
I am desperate for a resolution.
"Can it be changed on just that one port such as
switchport trunk native vlan 1"
Yes altho the default native vlan is vlan 1 anyway so under the interface
no switchport trunk native vlan 2
then do a "sh int trunk" again and you should see native vlan as 1.
If you're unsure just post "sh int trunk" again after executing the command.