I solved this by "upgrading" the PIX OS from Rom monitor mode. At the end of this process you are prompted for the activation key - this is not the case if you upgrade directly from PIX OS (using the copy flash tftp command)PIX version 6.2 is said to...

In our training centre we use a combination of routers, completed with a some switches - which is what you will need if you really go up to CCNP and CCIE.For CCNA you can practice with simulation tools, although a 2500 series router is more useful. (...

I've seen this on several platforms, it was always because of memory problems:- not enough flash causes the IOS image to corrupt, which causes reboots systematically (I've had a 3640 with a faulty flash card which reacted exactly the same)- not enoug...

Cisco IOS doesn't show defaults, so if your changes are in fact default settings, you will not see them in the running config.Whatever else you change should be seen in "sh run".If saving (copy run start) doesn't help, you should check your config-re...