200-150 · Question #148
Which Fibre Channel interface port mode is used to connect multiple switches together?
The correct answer is B. E port. Fibre Channel defines specific port types for different roles in a SAN fabric. The E port (Expansion port) is used exclusively to interconnect FC switches via an Inter-Switch Link (ISL).
Question
Which Fibre Channel interface port mode is used to connect multiple switches together?
Options
- AN port
- BE port
- CNL port
- DF port
How the community answered
(62 responses)- A2% (1)
- B87% (54)
- C3% (2)
- D8% (5)
Why each option
Fibre Channel defines specific port types for different roles in a SAN fabric. The E port (Expansion port) is used exclusively to interconnect FC switches via an Inter-Switch Link (ISL).
An N port (Node port) is used by end devices such as servers and storage arrays to connect into the FC fabric, not to interconnect switches with each other.
An E port (Expansion port) connects two Fibre Channel switches via an Inter-Switch Link (ISL), enabling fabric-level communication and allowing the SAN to span multiple switches in a single unified fabric. When two E ports form an ISL, they exchange Fabric Shortest Path First (FSPF) routing information so that all switches in the fabric can reach any attached N port device.
An NL port (Node Loop port) is used by end devices in an FC Arbitrated Loop topology, not for switch-to-switch connectivity in a switched fabric.
An F port (Fabric port) is the switch-side port that accepts connections from N ports on host or storage end devices, not from other FC switches.
Concept tested: Fibre Channel E port inter-switch link port mode
Source: https://www.cisco.com/c/en/us/td/docs/storage/mds9000/sw/7_3/configuration/san-os/mds9000_san-os_config_guide_7_3/fcport.html
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