VLAN Troubles

Wed Mar 7 14:44:22 UTC 2012

On Tue, 6 Mar 2012, Alan Bryant wrote:

> We have two switches that do not seem to be passing VLAN traffic. The
> two switches are a Dell Powerconnect 5324 & a Cisco 3560G. The Cisco
> switch appears to be functioning fine, but the Dell switch is only
> passing traffic to the Cisco that is on the default untagged VLAN1.
> Our second VLAN is not getting passed to the Cisco at all, I am not
> seeing any packets tagged with the particular vlan in Wireshark.
>
> I have Port 1 on the Dell switch connected to port 29 on the Cisco
> switch, and port 1 on the Cisco switch connected to the ASA.
>
> I have the following config on the relevant ports on the Cisco switch:
>
> interface GigabitEthernet0/1
> description ASA 5505
> switchport trunk encapsulation dot1q
> switchport mode trunk
>
> interface GigabitEthernet0/29
> description Radiology Switch
> switchport trunk encapsulation dot1q
> switchport mode trunk

Have you verified VLANs 12 and 22 are actually defined on the Cisco?

> vlan database
> vlan 12,22

Antonio Querubin
e-mail:  tony at lavanauts.org
xmpp:  antonioquerubin at gmail.com