Allowed vlan remove 2-19 ...., found after reboot on SG350 Cisco Switch

[AhmadZ]

Hi guys,

i have configured an SG350 Cisco switch, with 10 ports on it as trunk ports, these ports are connected to an ip phone and then to pc.

what have i done in details, is that i configured the ports with this config:

switchport trunk allowed vlans all

and i have vlan 10 and 20 with dhcp, 10 for data and 20 for voice, all works perfectly, i get vlan 20 on the ip phone and vlan 10 on the pc, but  after a reboot to the switch, the pc wasnt getting ip and was checking the port running config, and i found this additional command that i didnt add

switchport trunk allowed vlan remove 2-19,21-4094

how is this coming automatically, am i missing something? or it is a bug?

Thanks in advance

[Richard Burts]

If it is the case that the startup config does not have that command and that command does appear in running config after booting then there is something in the boot process that is not happy about vlan 10 (and perhaps vlan 30). Can you connect to the console port, then reboot the switch, and capture and post the output during the boot process? Perhaps there will be a message that clarifies what is happening.

[AhmadZ]

will check it later on, and post the output, thanks man!