Same vlan cannot ping each other between two switches.

[gciscol]

Hello, Please see the below diagram. F0/2 and F0/1 in w-Switch and Switch1 are connected to each other with the same port configuration as below:

w-Switch:

interface FastEthernet0/2
switchport trunk native vlan 10
switchport mode trunk

Switch1:

interface FastEthernet0/1
switchport trunk native vlan 10
switchport mode trunk

vlan10 10.0.10.2 can ping vlan10 10.0.10.1, 

vlan20 10.0.20.2 should be able to ping vlan20 10.0.20.1, but it cannot ping. Do you think its VM configuration issue? VM connection is configured as trunk(4095). Thank you

[amohammadimir · Accepted solution]

You have configured Virtual Guest Tagging. In VGT mode, the VLAN-tagged traffic will flow unmodified through the virtual switch and to the physical switch. The guest operating system is solely responsible for tagging and untagging on the frames. Are your virtual machines able to assign VLAN tags? if not you need to create two portgroups one for VM 10.0.10.2 with vlan id none (because native vlan is 10)  and one for VM 10.0.20.2 with vlan id 20.

[gciscol]

Thank you very much for your reply. 

Issue resolved