Using unlicensed IOS images in production violates Cisco licensing terms and may lead to legal liability.
If flash is low:
High. This is a mature release for "end-of-life" hardware, ensuring maximum uptime for legacy environments. Known Issues: C3560-ipservicesk9-mz.150-2.se11.bin
Upgrading a 3560 switch to the IP Services feature set transforms the device from a basic layer 2 switch into a robust layer 3 routing engine. Advanced Layer 3 Routing
If you have an active Cisco SmartNet contract or a valid support agreement: Using unlicensed IOS images in production violates Cisco
If you find yourself in ROMMON (prompt: switch: ), do not panic. You can recover by using the xmodem protocol to transfer a new IOS image directly via the console cable. While slower (it can take 30-60 minutes), it is a reliable last-resort method:
Intended platforms and hardware limitations Known Issues: Upgrading a 3560 switch to the
show version show license show boot show ip interface brief show vlan show flash:
Upgrading from an earlier IOS version (e.g., 12.2(35)SE5) directly to 15.0(2)SE11 is . Cisco engineering confirms: “Direct upgrade, from 12.2(35)SE train, to either 12.2(55)SE or 15.0(2)SE train are supported.”