What to do if Cisco router & switches got hacked ?

[yfs us <yfs_168us () yahoo com>]

Hi All,

       Just want to find out does anyone here came
across
the cisco switches & router got hacked. I'm not sure
which
one actually got hacked coz I'm not a security expert.
I do
notice that sometime my switches & router refuse to
accept
connection. But when I change to a new want every
things
work fine. 
       I do ask the IBM technical support & they told
me that
it was hacked. So now once a week I need to call the
IBM
support to fix it. They usually replace it. I'm
wondering
how do I prevent these in the future. 
      Besides these I too like to know how do I track
the 
hacker ? I had mail my ISP & they reply please go & 
hire a security expert with a good qualification. Is
these
what one usually get if they need help from the ISP ?
It looks
like the ISP suck or they r the one who did it. Or
time to change
ISP.
     Does one really need to have a good qualification
to hunt
the hacker ? As far as I know everyone is a hacker the
only
different is some is good & some is lousy coz hacker r
not
born they too go thru a pain in the ass experince b4
they 
really call them self a elite haxor. 
 
    All help r welcome.

Cheers

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