Switching From Nexus3k to ASA Access Port Issues.

SJValley · ‎12-10-2019

All,

I have a nexus 3k acting as LAYER2 only and it is directly connected to an ASA routed mode with Subinterfaces. All my ports that are configured and trunk ports send traffic properly, but my interface that is configured as an access port is not. any help would be appreciated.

Example Config

Host not able to pass traffic

interface Ethernet1/2
description Serverx
switchport access vlan 255

Host able to pass traffic

interface Ethernet1/3
speed 1000
description "DEVOPS_ESXI.10_Prod"
switchport mode dot1q-tunnel
switchport trunk native vlan 255

UOPLINK TO ASA

interface Ethernet1/47
speed 1000
description "connect to site"
switchport mode dot1q-tunnel

ASA

interface GigabitEthernet0/5.2
vlan 255
nameif DEV_Prod
security-level 50
ip address 10.254.255.129 255.255.255.128

Reza Sharifi · ‎12-10-2019

Hi,

Is there a specific reason for this command?

switchport mode dot1q-tunnel

shouldn't the port be just trunked

switchport mode trunk

Also,

switchport trunk native vlan 255

if the native vlan is 255 and not default vlan 1, the same command should be configured across all devices.

HTH