"show vlan" will tell you if the VLAN has been created on the Cisco. The config to create it is easy (and necessary): ! vlan 25 name Radiology ! Aled On 6 March 2012 17:55, Jason Baugher <jason@thebaughers.com> wrote:
+1 on show interface trunk, which will probably tell you that only vlan 1 is allowed on your trunk interfaces.
I find it easy to forget that a Cisco switch will not pass tagged traffic for a vlan if that vlan isn't created on the switch. Even if you do something like "switchport trunk allow vlan 12" on a trunk port, it won't create the vlan on the switch unless you specifically create it or you add it to an access port like "switchport access vlan 12".
Jason
On 3/6/2012 11:04 AM, Greg T. Grimes wrote:
On the cisco, do a 'show interface trunk'. Be sure that it thinks it's supposed to pass those VLANs. Make sure "Vlans allowed on trunk" includes the VLAN. Same for "Vlans allowed and active in management domain". Then the important one is "Vlans in spanning tree forwarding state and not pruned". If it's not there then it's being pruned. Also on your Dell uplink add the following line to the uplink port:
switchport access vlan add 12,22
See what that does for you.
On Tue, 6 Mar 2012, Alan Bryant wrote:
I hope everyone is having a better workday so far than I am.
I am trying to clean up the network for the Hospital I work for, and part of that is creating two VLAN's for two separate subnets on our network. Before, it was not separated by VLANs. We are also replacing our aged Juniper firewall with an ASA.
I'm very new to VLAN's, so I am hoping this is something simple that you guys can help me out with.
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
Here is the config for the Dell switch:
interface ethernet g1 speed 1000 duplex full exit interface ethernet g2 speed 1000 duplex full exit interface ethernet g3 speed 1000 duplex full exit interface ethernet g4 speed 1000 duplex full exit interface ethernet g5 speed 1000 duplex full exit interface ethernet g7 speed 1000 duplex full exit interface ethernet g9 speed 1000 duplex full exit interface ethernet g10 speed 1000 duplex full exit interface ethernet g12 speed 1000 duplex full exit interface ethernet g14 speed 1000 duplex full exit interface ethernet g15 speed 1000 duplex full exit port jumbo-frame interface ethernet g1 switchport mode trunk exit interface ethernet g24 switchport mode trunk exit vlan database vlan 12,22 exit interface range ethernet g(2,4,7,12,14-15) switchport access vlan 12 exit interface vlan 12 name Radiology exit interface vlan 22 name Guest exit interface vlan 1 exit
Anyone have any ideas or pointers? Is there more information that I need to provide? Vlan1 works just fine, of course. It is Vlan 12 that is not working. Everything on the Dell switch is communicating with each other just fine on the same subnet.