WIFI VLANs not communicating

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Apr 23rd, 2007
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I'm trying to set up 1130 APs connected to a 3750 L3 switch. I set up 3 SSIDs : test,

internal and guest. For some reason, I can't access the APs when the port is configured for trunking. I did the same on a 3560 switch with 2 SSIDs last week, and I'm getting

very different results.

Test: 10.10.10.x Native VLAN 1

Internal: 192.168.10.x VLAN 203

Guest : 192.168.100.x VLAN 202

I connect to the AP fine, but when I connect to 'internal' SSID, I can only communicate

if my IP is on the 192.168.10.x range, even though the 'test'VLAN is set to a different


The switch port configs:

interface GigabitEthernet1/0/7 ! ---I can access the AP

switchport access vlan 203


interface GigabitEthernet1/0/8 ! ---no communication---

switchport trunk encapsulation dot1q

switchport mode trunk

The AP config:

The AP config should be attached

I'm stuck, I have no idea what I'm doing wrong, PLEASE HELP :)

Chris Serafin

[email protected]

[email protected]

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john.preves Mon, 04/23/2007 - 10:21
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These sound like autonomous AP's.

All the ports should be trunked and the native vlan needs to be defined.

Int g1/0/7 has a vlan 203 defined which is why you can get to the AP, g1/0/8 has no vlan

try this:

switchport trunk encapsulation dot1q

switchport trunk native vlan 1

switchport trunk allowed vlan 1, 202-203

switchport mode trunk

Try this on one and test it. Then populate the rest of the switch

cisco80211 Mon, 04/23/2007 - 10:51
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I have tried this and 2 of the commands do not show up in the config. (must be default configs)


no switchport access vlan 203

switchport trunk encap dot1q

switchport trunk native vlan 1

switchport trunk allowed vlan all

switchport mode trunk

this shows in the config:

interface GigabitEthernet1/0/7

description [ Link to AP7 ]

switchport trunk encapsulation dot1q

switchport mode trunk

Thanks for your original response.

Chris Serafin

[email protected]

3iadministrator Mon, 04/23/2007 - 19:05
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Not too sure on your case though.I am using 1130 as Lightweight mode,which let the Wireless controller do the configuring.

But one thing for sure, Your AP-Manager and Management Interfaces is recommended to be on the same vlan.hopes that help.

john.preves Mon, 04/23/2007 - 20:47
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I would at this point write erase and reload the switch and clear out whatever may be lurking in there.

jgonzal84 Fri, 05/25/2007 - 12:37
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Your getting barked by the switch because you did not set up those vlan's.. I think... Try issuing this statement in config mode

int vlan 202

no shut

int vlan 203

no shut

then go to the interface 1/07 and reissue the statements..

Do a show vlan in global mode to see if your vlan are there..

Hope this works for you..

ibrunello Tue, 06/05/2007 - 09:02
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it worked for me.

I don't have (yet) a VTP domain, so I need to configure vlan on each switch.

Adding it (via the "vlan database" command, since it is an L2 device), and it started working.

ericgarnel Tue, 06/12/2007 - 06:32
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I may have missed it, but where is your layer 3 device/config that lets the seperate vlans communicate with each other?

rajinder63 Sat, 07/14/2007 - 06:39
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can u please change ur native Vlan1 to native vlan203 , u will be accessing then .. no issue .. try it ..

jwadleigh Fri, 08/24/2007 - 10:35
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Keep in mind that only the link between the WLC and the wired network should be trunked.

The AP's should be plugged into Access ports.

rgnelson Mon, 08/27/2007 - 08:16
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Correct - sorta. If H-REAP is to be used, the AP is then connected to a trunk port.


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