For blade server and Fabric Interconnect connectivity, there are two connections involved between the server mezzanine card, IOM backplane ports, IOM fabric ports, and Fabric Interconnect server ports. These connections are as follows:

• The connection between the blade server mezzanine card and IOM backplane port that connects the blade server to the IOM in the chassis
• The connection between the IOM fabric port and Fabric Interconnect server port that connects the IOM in the chassis to the Fabric Interconnect

Connectivity failure can happen due to a mezzanine card, IOM ports, or Fabric Interconnect server ports. We will now look at different port failure scenarios.