I have core switch 4500 with 10 VLANs configured, as Vlan 2, 3,4,etc, a fiber link is going from the core switch to each location, some ports from the core switch 4500 is connected to 2 sites ( Diffrenet Vlans ), cisco 2950 switches are configured as client mode in all the location, this setup was there for two years, my problem is that in one day I had a network slowness and some Vlans were down ( Trunk light was off) and when i restared the swicth the truck was on again, in my core switch I have configured the Trunk as below
switchport access vlan 5
switchport trunk encapsulation dot1q
switchport mode trunk
I think I have problem with the second line ( switchport access vlan 5 ) as it should not be there)
How to change the configuration in the core switch and have it replicated to other swicthes as I have done the same command (switchport access vlan ) on all he 2950 trunks. also how to use Vlan allow command.