there is more than one 'IOS' from
Cisco there is the IOS that runs on their
routers(the one most people think of and the one that runs on some of their
switches(derrived from original
Kalpana switch interface. There are also other non-IOS pieces of software that often get reffered to as IOS, such as the Altiga derrived software that runs on their
VPN Concentrators. There are also some nifty devices that run both the
Kalpana and the Cisco
IOS. these wonderful devices are usually large switches that have
layer 3 routing modules in them. the layer 3 board is actually a
router that talks with the
switch using virtual
gigabit uplinks.
speaking of fun with the
debug command in the
IOS, i accidentally brought a
router to its knees today buy debugging an IP
NAT session. someone had configured the router to log at the
debug level to a
syslog server that was off of one of the
NATed interfaces. i made the
mistake of doing a debug ip nat detail which really pissed off
happy mr. router. fortunately for me the ios is smart enough to kill off
processes that take an inordinate amount of
cpu time. that will
teach me to try to solve an ip nat
problem at 5:00AM after staying up all
night