Hello,
Today I mistakenly caused major problems on our network, and I am trying to determine where I screwed up.
I created a LACP trunk with a HP5820 switch (switch A) and Aruba3810M switch (switch B).
On switch A I created a bridge aggregate and on switch B created an lacp trunk. When I plugged them in, I lost access to switch A and instantly all of our important applications went down (including Exchange, ERP, edge switches). I unplugged the cable immediately when we started having problems.
On switch A I see CRC errors on the bridge aggregate and ten-gig interface. On switch B I see FCS Rx and Drop Tx errors.
I realized I used an OM2 cable when I should have actually used an OM3 cable. Is it possible that using the wrong cable could that have caused all of the problems?
Please forgive me if this is a stupid question.
#trunkproblem