SG300-20 Changes VLAN Settings

[fmarshall3]

I am using SG300-20 switches (and other dash numbers) as Layer 2 switches.  
In some cases, I need a VLAN for management - so I assign some ports to those VLANs and the other ports for the functional network role for which the switch is intended.

I expect that once I've configured the VLANs, they will stay that way.

But, they don't any more... ports VLAN memberships change and the switch stops working.

How can I use the SG300-20 as just a simple, managed switch again?

[balaji.bandi]

have you saved the config, is the config lost due to reboot ?

Try disabling macro  and test it : (make sure you always save the config)

https://www.cisco.com/c/en/us/support/docs/smb/switches/cisco-350-series-managed-switches/smb5842-configure-auto-smartport-properties-switch-through-cli.html

[fmarshall3]

Thanks for the information!  

I do wish this whole thing were more an additive option rather than an ugly surprise!!

[balaji.bandi]

Agreed, but this is what it is..maybe you as a customer can send an email for improvements or feature requests if you like.