Cisco 300-625 DCSAN flashcards

32 cards. Read the term and the definition here. The deck at the top of this page is optional.

VSAN 1 default

VSAN 1 is the default VSAN on every MDS switch and cannot be deleted. Ports are assigned to it by default until moved to another VSAN using the vsan database command.

setup script

The initial configuration utility on an MDS switch. It prompts for the admin password, mgmt0 IPv4 or IPv6 address, and default gateway, and can optionally configure NTP and AAA.

install all system

The NX-OS command that upgrades both the kickstart and system images together. Adding the non-disruptive keyword upgrades one supervisor at a time on dual-supervisor systems.

show interface brief

Displays every port with its administrative state, mode, and operational state, including F, FL, E, TE, NP, Fx, and down, plus the assigned VSAN.

RBAC role command

The role name command creates a custom role, and rule statements grant read or read-write access to feature groups. The username command then assigns the role to a user.

write erase

Removes the startup configuration from the switch. After a reload, the switch returns to factory defaults and the setup script runs again.

SAN port-channel

A bundle of ISLs created with interface san-port-channel N and channel-group N. Member ports become TE ports, and show port-channel summary verifies the bundle state.

show license usage

Lists installed licenses and shows which features are currently consuming them. Features such as NPV, NPIV, FCoE, and IVR fail to enable without an installed license.

Principal switch election

The switch with the lowest switch WWN becomes the principal switch. It assigns domain IDs to all other switches in the fabric, and show fcdomain displays the result.

FLOGI

The fabric login process in which an N-port requests an FC-ID from the principal switch. The port then registers with the name server, visible in show flogi database.

zoneset activate

The command that activates a zoneset in a VSAN. Only one zoneset can be active per VSAN, and zoneset distribute full pushes it to peer switches.

default-zone deny

When no zoneset is active, this setting blocks all traffic between ports. The default-zone permit setting instead allows all traffic. Enhanced zoning stores the choice fabric-wide.

Segmented ISL

An ISL that fails the domain or zone merge appears isolated in show interface brief. Resolve by matching domain IDs or zoning, then restart fcdomain or activate the zoneset.

FSPF

The Fabric Shortest Path First routing protocol used inside a VSAN. It builds a link-state database, and show fspf vsan N displays routes and neighbor state.

device-alias commit

The command that applies entries in the device-alias database. Aliases can then be used in zones instead of pwwn values, and device-alias distribute shares them fabric-wide.

IVR

Inter-VSAN Routing lets devices in different VSANs communicate. It requires an IVR license, an ivr vsan-topology database, and ivr zoneset activate on the border switches.

Domain ID range

Valid Fibre Channel domain IDs are 1 through 239. Values 0 and 255 are reserved, and a static domain is set with fcdomain domain N static followed by a disruptive restart.

NPV enable

This command turns the switch into a non-principal switch. Upstream ports become NP ports connected to core F ports, and downstream ports remain F ports.

NPIV

N_Port ID Virtualization lets one F-port carry logins for many N-ports, each receiving a fabric-provided FC-ID. The core switch must support NPIV for NPV to work.

show npv flogi-table

Displays the proxied FLOGI entries that an NPV switch forwarded to the core. It lists server WWPNs, assigned FC-IDs, and the upstream interface used.

NPV traffic-map

A configuration that pins a downstream server to a specific upstream NP port. It controls which core link carries that server's traffic when multiple uplinks exist.

vFC interface

A virtual Fibre Channel interface created with interface vfc N and bound to an Ethernet port. It carries FCoE traffic for a VSAN and appears as an F port.

FCoE license

A feature license required before feature fcoe can be enabled on an MDS switch. Without it, FCoE configuration is rejected and show license usage shows no consumption.

FIP

The FCoE Initialization Protocol. It performs VLAN discovery, FLOGI, and fabric login before FCoE frames flow, and its endpoints are the ENODE and the FCF.

FCoE CoS value

FCoE traffic uses CoS 3 by default. Lossless Ethernet requires priority flow control and a no-drop class so that FCoE frames are not dropped during congestion.

show npv status

Displays whether NPV is enabled, the number of server and client interfaces, and the state of each external interface. It confirms the NPV configuration is active.

Port security

A feature that restricts which device WWPNs may log in to a port. Entries are added to a database, activated per VSAN, and violations trigger a shutdown action.

DHCHAP

The FC-SP authentication protocol that verifies peers using a shared secret or hash. It is enabled with fcsp dhchap and verified with show fcsp.

Port tracking

A feature that links tracked ports so that when one fails, its associated ports are also brought down. It prevents traffic black-holing after an uplink failure.

Call Home

An alerting feature that sends notifications to configured destinations such as email or HTTP. Alert groups select which events trigger a message, and call-home send tests delivery.

Smart zoning

A zoning mode that compresses a zone so each initiator-target pair becomes its own zone. It reduces TCAM usage and is enabled per VSAN with zone smart-zoning enable.

Slow-drain detection

A mechanism using port-monitor policies and timeouts to identify devices that hold frames too long. Isolating those devices prevents congestion from spreading across the fabric.