Hello Are you using any kind of dynamic routing/static routing over the GRE? BFD maybe?  BR

Hi, The connection between Cisco and Brocade should works as NPV/NPIV. But your design will not work, you cannot connect one NPV switch in another NPV switch. For you desing works, you need invert the switch roles. Uses N5K as NPIV and Brocade as NPV...

Hello    Before call to TAC,    What is your UCS version? Did you check compatibility matrix?  https://ucshcltool.cloudapps.cisco.com/public/   Googling i found this bug on past version of ESXi. Maybe this bug has come back.   https://bst.cloudapps....