link to modem going down

In the past week twice the link to my modem has gone down on my router. I
have to unplug the M500 router and then plug it in and I am set to go again.
The only change I did to my network before that is I added a microsoft
switch.

What I am wondering what would cause this link to shut down on the router?

I get this quite regularly too, and it's so frustrating.

If anybody has an answer, please let us know.



>-----Original Message-----
>In the past week twice the link to my modem has gone down
on my router. I
>have to unplug the M500 router and then plug it in and I
am set to go again.
>The only change I did to my network before that is I added
a microsoft
>switch.
>
>What I am wondering what would cause this link to shut
down on the router?
>
>
>.
>