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dsDataCenter > CCNA Data Center > Flashcards

CCNA Data Center Flashcards

1
Q

Describe how protocol Fiber Channel handles flow control

A

The receiver RX will send a credit signal to transmitter to tell it amount which is allow to send

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2
Q

Why have LAN and SAN have been segregated:

A
  1. Security -
  2. Bandwidth - SAN was also higher
  3. Flow Control
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3
Q

What is FCoE

A

Combining FC protocol with Ethernet Protocol to work over 10GIG links

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4
Q

Reasons to use the layered/modular approach

A
  1. Scalability

2. Resilient

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5
Q

Describe features of the Core Layer

A
  1. Large amount of bandwidth 40gig 100gig…

2.

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6
Q

What is VN-Link

A

The ability to tag traffic from one virtual machine to track the flow thru the network

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7
Q

Cisco Data Center 3.0 approach

A
  1. Virtualization
  2. Unified Fabric
  3. UCS
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8
Q

Nexus 7K should be able to do the following:

A
  1. L3/L2

2. DCB/FCoE

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9
Q

what is ISSU

A

In service software upgrade. Can be upgrade without interruption.

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10
Q

What is the CMP

A

Connectivity Management Processor.
Light out connectivity.
Own Memory
Own power supply

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11
Q

What is the difference between 5000 and 5500 series Nexus

A

The 5500 series provides L3

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12
Q

What is GEMs

A

Generic Expansion Module.

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13
Q

MDS

A

Multidirector Switches, Part of SAN

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14
Q

VOQ

A

Virtual Output Queuing

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15
Q

Protocols found in SAN

A
  1. FCoE
  2. FC
  3. FICON
    4, FCIP
  4. iSCSI
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16
Q

License types for SAN - MDS

A
  1. Feature Based

2. Module Based

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17
Q

What is NPV

A

N Port Virtualization - allows to scale SAN and not consume domain ids for each switch implemented

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18
Q

Sup 2 vs Sup 2A

A

SUP 2A has FCoE

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19
Q

On the Nexus, what version of SSH is default

A

SSHv2

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20
Q

What are the VRFs that default

A
  1. Default

2. Management

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21
Q

What can be upgraded with the ISSU

A
  1. Kickstart
  2. BIOS
  3. System
  4. FEX
  5. I/O Module
22
Q

In an upgrade of the 5K, since there is not dual sups, what happens

A

The control plan will be interrupted, but the data plane continues to forward traffic

23
Q

Steps to take when upgrading 5000

A
  1. download software cisco.com
  2. tftp -> bootflash
  3. show incompatibility
  4. show install all impact
  5. install all
  6. show install all status
24
Q

type of planes of nexus

A
  1. data plane
  2. management plane
  3. Control plane
25
Q

what is CoPP

A

Control plane policing -

control the limits of egress and ingress

26
Q

CFS

A

Cisco Fabric Service

27
Q

Peer Link port has to be what speed

A

10Gig

28
Q

what parameters can you see on the keepalives

A
  1. Destination
  2. interval
  3. timeout
  4. hold timeout
  5. vrf
  6. udp port
  7. tos
29
Q

Three important vpc commands

A
  1. show vpc brief
  2. show vpc peer-keepalive
  3. show vpc role
30
Q

TRILL

A

Transparent Interconnection of Lots of Links - replacing Spanning Tree Protocol

31
Q

What protocol does TRILL use

A

IS-IS

32
Q

ECMP

A

Equal Cost Multipathing routing of L2 info - Fabric Path

33
Q

OTV

A

Overlay Transport Overlay

34
Q

OTV - Edge devices -two devices

A

Multihomed

35
Q

OTV - Internal interfaces

A

do not participate in OTV. They do pass vlan information

36
Q

OTV - Join Interfaces

A

L3 interfaces. Physical L3 interfaces.

37
Q

OTV - Overlay Interfaces

A

Virtual interface that carry OTV traffic

38
Q

EoR

A

End of Rack - 5K

39
Q

ToR

A

Top of Rack - 2K

40
Q

Where is a VNtag used

A

5k to 2K

41
Q

What standard does VNtag use

A

802.1Qbh

42
Q

What is the Fabic Port

A

It is the physical port that connects to the 2K

43
Q

Where is a FEX uplink

A

on the 2K to the 5K

44
Q

What is a FEX port

A

the port on the 2K that connects to a device

45
Q

What is a VDC

A

Virtual Device Context

46
Q

What are the physical disks called in storage

A

Array - based

47
Q

What are the Logical Disk identifier called for storage

A

LUN - Logical Unit Number

48
Q

What is LUN MASKING

A

Only allowing certain servers access to the logical disk

49
Q

what is PWWN

A

Port World Wide Name

50
Q

LUN MAPPING

A

done in FC environments - maps logical disks to host bus adaptors

51
Q

LUN Zoning

A

Cisco version of LUN MAPPING

52
Q

What are the benefits of virtualization

A
  1. Partitioning
  2. Encapsulation
  3. Isolation
  4. Hardware Abstraction
  5. CapEx/OpEx

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