I have heard from many different companies that call TAC, that TAC says Cisco does not recommend to turn SPAN on for anything other than troubleshooting.  I have seen this being said on all switching platforms.  Today someone from a very large compan...

I am trying to understand what each of the values represent in the show controllers ethernet-controller phy command.  Below is an output of an interface.  Are there any documentation on what specifically each line item represents?  I know some are pr...

While I have used monitor sessions for years in production for deep packet inspection for IDS/IPS, packet capture and network analysis recently a some potential clients have been told by Cisco support that SPAN is not a tool for this application.  I ...

With Cisco having so many product lines and they all use different hardware and software, is there one place that informs the viewer of span considerations by switching platform.  Here let me explain some more.  If I choose a 3750x I know the forward...