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11-16-2021 06:22 AM
Dear community,
I have configured a subinterface (ip addresss, vlan) on a parent FTD interface. The connection goes to a switch trunk port. For some reason there is no connectivity between FTD and switch.
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11-17-2021 10:24 AM
I suspect your issue is with using VLAN 1 on your sub-interface. VLAN 1 is the default native VLAN on trunk ports and your configuration suggests that you are using the default configuration. You can try one of the following:
1. Change your native vlan on the switch and firepower side to something else (e.g. 999)
2. Use a different vlan for your sub-interface
I hope this helps!
Thank you for rating helpful posts!
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11-17-2021 10:24 AM
I suspect your issue is with using VLAN 1 on your sub-interface. VLAN 1 is the default native VLAN on trunk ports and your configuration suggests that you are using the default configuration. You can try one of the following:
1. Change your native vlan on the switch and firepower side to something else (e.g. 999)
2. Use a different vlan for your sub-interface
I hope this helps!
Thank you for rating helpful posts!
