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Beginner

Wireshark capture VLAN IDs

I need to capture switchport's packets and see if a correct VLAN is set.

Capture packets don't have VLAN IDs - whole header is missing.

 

Workstation is Windows 10 with latest Intel driver and the driver has working VLAN support.
Also tried ASUS USB ethernet adapter with VLAN support with no success.

I initiate communication with a device (to access web conf GUI), which is plugged in gi1/0/1.

The device is wireless AP, where VLAN 20 is management and VLAN 10 is data.

The Device does not support wireless VLAN tagging and therefore VLAN 20 is tagged and VLAN 10 untagged.

 

vlans.png

Catalyst 3750:

interface gigabitethernet 1/0/1

 switchport mode trunk

 switchport encapsulation dot1q

 switchport trunk native vlan 10

 switchport trunk alloved vlan 10,20

 

interface gigabitethernet 1/0/2

 switchport mode trunk

 switchport encapsulation dot1q

 

monitor session 1 source interface gi1/0/1 both

monitor session 1 destination interface gi1/0/2 encapsulation replicate

 

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Rising star

Re: Wireshark capture VLAN IDs

 - As far as I understand the info from the link below you may need to change registry settings on windows too :

 https://www.intel.com/content/www/us/en/support/network-and-i-o/ethernet-products/000005498.html

M.

2 REPLIES 2
Beginner

Re: Wireshark capture VLAN IDs

Nobody?
Highlighted
Rising star

Re: Wireshark capture VLAN IDs

 - As far as I understand the info from the link below you may need to change registry settings on windows too :

 https://www.intel.com/content/www/us/en/support/network-and-i-o/ethernet-products/000005498.html

M.

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