i dont know if it's the correct forum but i got a simple question that i would like to be answered.
Recently i brought a 877 adsl router with the advance security ios. I thought this ios supported 802.1q, but i don't think so. So i upgraded to advance ip services ios. This ios support 802.1q and vlan implementation. The router seems to work fine. Everything was configured through CLI.
My question: This upgrade can cause some kind of problem with router functionality? if so, which ones?
The configuration is very simple: no vpns and basic firewall configuration.
Thanks for your help.