ReadyNAS Ultra 4 is slowing down my entire network LAN & WAN

StephenB wrote:
IseWise wrote: Ive disconnected one of the ethernet cables and my network seems to be working properly. That suggests the problem was some form of an ethernet/bridging loop. Generally when you connect two cables that way you want to use a link aggregation protocol (for instance LACP). I think you might not have been doing that. LACP needs the switch to support it to.

Perhaps, I spoke too soon. It appears that the problems have returned. I tried connectly the NAS directly to the router and that didnt seem to help either. Ive had both ethernet connections connected before for quite some time to the same switch and haven't had issues before.

IseWise wrote:
However, won't this lower my read/write performance to the NAS?

StephenB wrote:
Not for single user performance. If you have simultaneous users it might reduce performance a bit.

At this point, Ill take a small performance hit for reliability on my network.

Im wondering if this problem has anything to do with me recently switching ISPs. I recently upgraded from Centurylink DSL to Comcast cable.

I checked Network > Global Settings > DNS settings were empty. I filled them in with my DNS servers provided by my ISP, but I am still have slow down issues. A have ftp running on the NAS. Could this be related?