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Cisco 300-625 DCSAN study materials
Cisco 300-625 DCSAN study resources

Cisco 300-625 DCSAN: Configuring and Managing Cisco Data Center Storage Networking Features

Cisco 300-625 DCSAN · Work through your exam, one topic at a time.

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Configuring and Managing Cisco Data Center Storage Networking Features

Domain 4 tests the Cisco MDS features that secure, monitor and prioritise storage traffic after basic fabric setup: port security, fabric binding, FC-SP, QoS, SPAN, Call Home, slow-drain detection and SAN analytics. The exam usually asks which feature solves a specific risk.

Security and authentication

  • Port security binds permitted pWWNs to an F port. Populate the database statically or with auto-learning, then activate it; a violation can shut the port or restrict it.
  • Fabric binding controls E-port formation by allowing only listed switch WWNs (sWWNs) in a VSAN. Activate the database per VSAN; force-activate may be needed when the local switch is not yet in the list.
  • FC-SP with DHCHAP authenticates switches or hosts using a shared secret and MD5/SHA-1 hashes. Both ends must be configured consistently.

Monitoring and QoS

  • QoS assigns FC priorities and applies service policies; verify that the policy is attached where traffic actually flows.
  • SPAN copies FC traffic to an SD destination port; that port is not a normal host port.
  • Slow-drain and credit-loss detection identify congested devices; Call Home and syslog deliver alerts; SAN analytics provides flow-level SCSI statistics on supported hardware.

Worked example

After port security is enabled on an F port, a new HBA fails to log in. The HBA's pWWN is absent from the active database, or the database was edited but not activated. Check show port-security and the active database, add the pWWN, activate, and retry FLOGI. If auto-learning is on, confirm the learned entry was committed to the active database. The reasoning: port security filters at login, so a correct zone and VSAN will not help if the pWWN is not permitted on that interface.

Traps

  • Confusing port security (pWWN on F ports) with fabric binding (sWWN on E ports).
  • Editing a security database without activating it.
  • Configuring DHCHAP on only one side of an ISL.
  • Using an SD port for production traffic or assuming SPAN changes forwarding.