Whenever you install a new card, module or Cisco IOS Software image, it is important to verify that the router has enough memory and that the hardware and software are compatible with the features you want to use.
To check for hardware and software compatibility and memory requirements, perform these steps:
If you want to keep the same features as the version currently running on your router, but do not know which feature set you are using, issue the show version command and paste it in the Output Interpreter tool.
If you need to upgrade the Cisco IOS Software image to a new version or feature set, refer to How to Choose a Cisco IOS Software Release.
If you determine that a software upgrade is required, refer to these documents:
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The Bold lines shows the issue where VLAN could not be shutdown on 3560 Switches in Packet Tracer!.Switch>enSwitch#conf tEnter configuration commands, one per line. End with CNTL/Z.Switch(config)#vlan 30Switch(config-vlan)#shutdown^% Invalid input dete...
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