nx.os.and.cisco.nexus.switching.2nd.edition.1587143046

Figure 8-4. FIP Process
FIP can be leveraged by native FCoE-aware devices to help provide security against
concerns such as spoofing MAC addresses of end nodes and helps simpler switches, such as
FIP Snooping devices, learn about FCoE traffic. This awareness can provide security and
QoS mechanisms that protect FCoE traffic from other Ethernet traffic and can help ensure a
good experience with FCoE without the need to have a full FCoE stack on the switch.
Currently the Nexus 4000 is the only Nexus device that supports FIP snooping.
Single-Hop Fibre Channel over Ethernet
Single-hop FCoE refers to an environment in which FCoE is enabled on one part of the
network, frequently at the edge between the server and the directly connected network
switch or fabric extender. In a single-hop topology the directly connected switch usually has
native Fibre Channel ports which in turn uplink into an existing SAN, although you can have
a complete network without any other fibre channel switches. Single-hop FCoE is the most
commonly deployed FCoE model because of its double benefit of seamless interoperability
into an existing SAN and the cost savings with a reduction in adapters, cabling, and optics to
servers.
This reduction in cabling and adapters is accomplished through the use of a new adapter:
Converged Network Adapter (CNA). CNAs have the capability to encapsulate Fibre
Channel frames into Ethernet and use a 10GbE Ethernet interface to transmit both native
Ethernet/IP traffic and storage traffic to the directly connected network switch or fabric
extender. The CNA’s drivers dictate how it appears to the underlying operating system, but
in most cases it appears as a separate Ethernet card and separate Fibre Channel Host Bus