QFabric, Specialist (JNCIS-QF) v6.0

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Exam contains 113 questions

Which three Qfabric system hardware architectures help ensure high availability and minimize downtime? (Choose three.)

  • A. redundant Director devices
  • B. redundant network Node groups
  • C. redundant Interconnect devices
  • D. redundant control plane devices
  • E. redundant Director groups

Answer : ACD

What must happen for QFabric system RVIs to become active?

  • A. A network Node group is configured on the RVI VLAN.
  • B. An operational Layer 2 interface is associated with the RVI VLAN.
  • C. A server Node group is configured on the RVI VLAN.
  • D. A Layer 3 interface is configured on the RVI VLAN.

Answer : B

What is the function of an Interconnect device in a QFabric system?

  • A. It connects endpoints such as servers or storage devices to the QFabric system.
  • B. It connects all Node devices in the QFabric system and directs traffic between them.
  • C. It manages, monitors, and maintains all components in the QFabric system.
  • D. It supports the control plane network and facilitates communications between QFabric system devices.

Answer : A

A customer wants to set up a QFX3000-M QFabric system to consolidate existing 1 GbE networks and to provide a low latency and high performance 10 GbE network. Network engineers must consider the licenses required to setup this system.
Which two licenses are required? (Choose two.)

  • A. The license for the FCoE-to-FC gateway.
  • B. The license for the QFX3000-G base QFabric software.
  • C. The license for the QFX3000-M base QFabric software.
  • D. The license for the QFabric Node device feature.

Answer : CD

You have just configured a QFabric system as a transit FCoE switch between a server and an FCoE gateway device. The server's converged network adapter state is showing as
Which two commands will assist in troubleshooting the issue? (Choose two.)

  • A. show dcbx neighbors
  • B. show fip snooping
  • C. show fibre-channel flogi nport
  • D. show hba connections

Answer : AB

According to Juniper Networks recommendations, specific ports have been reserved on the
EX4200 switches to connect to each of the QFX3000-M QFabric system device types.
Which ports connect to the Interconnect devices?

  • A. ports 0-3
  • B. ports 16-19
  • C. ports 20-23
  • D. uplink port 0 and port 1

Answer : B

You are cabling the data plane of a QFabric system using QFX3008-I Interconnect devices.
You require an uplink capacity of 320 Gbps from each Node device.
Which two statements are true? (Choose two.)

  • A. You must explicitly enable ports 4-7 as uplink ports on the Node devices.
  • B. You must use QFX3500 Node devices.
  • C. You must use QFX3600 Node devices.
  • D. You must explicitly enable ports 13-16 as uplink ports on the Node devices.

Answer : AC

You notice that Fibre Channel over Ethernet (FCoE) traffic is dropped in a QFabric system.
What are two reasons why this is happening? (Choose two.)

  • A. The FCoE traffic is not classified correctly at the egress interface.
  • B. The FCoE traffic is not classified correctly at the ingress interface.
  • C. Priority-based flow control (PFC) is not enabled.
  • D. Data center bridging exchange (DCBx) is enabled.

Answer : BC

-- Exhibit --
On node2:
user@node2> show ethernet-switching table
Ethernet-switching tablE.119 entries, 104 learned
VLAN MAC address Type Age Interfaces
vlan200 * Flood - N2:All-members

N3:All-members -

N4:All-members -
vlan200 00:00:02:00:00:01 Learn 0 N2:ae0.0
vlan200 00:00:02:00:00:02 Learn 0 N2:ae0.0
vlan200 00:00:02:00:00:03 Learn 0 N2:ae0.0
vlan200 00:00:02:00:00:06 Learn 0 N2:ae0.0
On node5:
user@node5> show ethernet-switching table
Ethernet-switching tablE.119 entries, 104 learned
VLAN MAC address Type Age Interfaces
vlan200 * Flood - N2:All-members

N3:All-members -

N4:All-members -
vlan200 00:00:05:00:00:01 Learn 0 N5:ae0.0
vlan200 00:00:05:00:00:02 Learn 0 N5:ae0.0
vlan200 00:00:05:00:00:03 Learn 0 N5:ae0.0
vlan200 00:00:05:00:00:06 Learn 0 N5:ae0.0
user@node5>show route forwarding-table family ethernet-switching vlan vlan200---qfabric
Routing tablE.default.ethernet-switching
Destination Type RtRef Next hop Type Index NhRef Netif
7, * user 0 comp 1676 2
7, * intf 0 rslv 1650 1
7, 00:00:02:00:00:01 user 0 comp 1673 51
7, 00:00:02:00:00:02 user 0 comp 1673 51
7, 00:00:02:00:00:03 user 0 comp 1673 51
7, 00:00:02:00:00:05 user 0 comp 1673 51
7, 00:00:02:00:00:06 user 0 comp 1673 51
user@qfabric>show route fabric table default.bridge.0 bridge-route-mac-address
default.bridge.0: 110 destinations, 165 routes (110 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both
-- Exhibit --
Click the Exhibit button.
Referring to the exhibit, Host A on Node device node2 and Host B on Node device node5 are on the same VLAN but Host A cannot ping Host B.
Host A's MAC address is 00:00:02:00:00:01.
Host B's MAC address is 00:00:05:00:00:01.
What is causing this problem?

  • A. Host B is not connected to Node device node5.
  • B. The MAC address of Host A is not learned in node2.
  • C. The MAC address of Host A is not in the RPDf table of Node device node5.
  • D. The MAC address of Host B is not learned in node5.

Answer : C

-- Exhibit

-- Exhibit --
Click the Exhibit button.
Server B is attached to the yellow VLAN. Server C is attached to the pink VLAN.
Referring to the exhibit, which statement is true about server B?

  • A. Server B can communicate with Server C directly, because both devices are on SNG-1.
  • B. Server B can communicate with Server C through the Director group.
  • C. Server B can communicate with Server C if RVIs for the associated subnets are defined.
  • D. Server B can communicate with Server C through the fabric manager Routing Engine.

Answer : C

You are troubleshooting latency on a Node device on your QFabric system and discover a
Layer 2 loop.
What would cause this behavior?

  • A. STP was disabled on the Interconnect devices.
  • B. A switch was attached to both nodes in a redundant server Node group.
  • C. Data center bridging was disabled on the affected Node device.
  • D. The fabric administrator is unresponsive.

Answer : B

-- Exhibit --
user@qfabric> show fabric administration inventory
Item Identifier Connection Configuration

Ungrouped Node device -

P4086-C Disconnected -

P4088-C Disconnected -

Node group -

NW-NG-0 Connected Configured -

RSNG-1 Disconnected -

Node-2 P4097-C Disconnected -

Node-3 P3603-C Disconnected -

Interconnect device -

IC-P4840-C Connected Configured -

P4840-C/RE0 Connected -

IC-P4846-C Connected Configured -

P4846-C/RE0 Connected -

Fabric manager -

FM-0 Connected Configured -

Fabric control -

FC-0 Connected Configured -

FC-1 Disconnected -

Diagnostic routing engine -

DRE-0 Connected Configured -
-- Exhibit --
Click the Exhibit button.
Which two statements are true for the system shown in the exhibit? (Choose two.)

  • A. The RSNG-1 Node group has not yet received its configuration and is currently waiting for its associated Node devices to join the group.
  • B. The NW-NG-0 Node group will select the first Node device to join the group as the Routing Engine for the group and will designate all others as PFEs.
  • C. The Node devices listed as ungrouped Node devices have been administratively removed from the system's configuration.
  • D. The current state of the FC-1 Routing Engine indicates a problem or a transitioning state caused by improper control plane communications.

Answer : A,D

Which command executed from NW-NG-0 displays the PFE ID for all nodes in the fabric?

  • A. show fabric administration inventory
  • B. show virtual-chassis protocol adjacency fabric
  • C. show oam fabric internal-database device
  • D. show virtual-chassis status fabric

Answer : C

You must determine which FTE interfaces of a Node device named Node-1 are connected to which Interconnect device.
Which operational mode command provides the desired information?

  • A. show interfaces fabric Node-1:fte* extensive
  • B. show fabric administration inventory node-devices Node-1
  • C. show chassis fabric connectivity device Node-1
  • D. show fabric administration inventory interconnect-devices

Answer : C

Which routing table is used to store Layer 2 routing information on system components?

  • A. bgp.bridge.0
  • B. bgp.bridgevpn.0
  • C. bgp.macvpn.0
  • D. bgp.mac.0

Answer : B

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Exam contains 113 questions

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