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CCNA 200-301 > EtherChannel > Flashcards

EtherChannel Flashcards

1
Q

What is a flow in regards to EtherChannel?

A

A flow is a communication from a client to a server using a particular application

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2
Q

A single flow is _________________ onto a single port channel interface

A

Load Balanced

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3
Q

When a flow is established, the flow will go over multiple port channel interfaces or just one for the entirety of the flow?

A

Just one

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4
Q

True or False: Packets from the same flow are load balanced round robin style across all the interfaces in the port channel (EtherChannel)?

A

False. Flows go over a single port channel interface

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5
Q

Why do flows go over just one single port channel interface when they could go over multiple ones?

A

Because packets could arrive out of order and would break some applications if that were to happen

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6
Q

True or False: Any single flow receives the bandwidth of all the links in the port channel (EtherChannel) as a maximum?

A

False. The flow receives the bandwidth of a single port channel as it’s maximum bandwidth

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7
Q

Does EtherChannel also provide redundancy?

A

Yes. If a port channel interface goes down, the other port channel links will pick up the slack with redundancy

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8
Q

What is the starting rule of thumb recommendation for oversubscription from the access layer to the distribution layer?

A

20:1

This means if you had 20 PCs connected to access layer switch all at 1Gbps links you would require a single 1Gbps uplink from the access layer to the distribution layer to support those PCs and their needs

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9
Q

What is the primary benefit of EtherChannel?

A

It groups multiple physical interfaces into a single logical interface

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10
Q

Does Spanning Tree see the EtherChannel as multiple interfaces?

A

No, it recognized the EtherChannel as one interface

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11
Q

Traffic will be _________________ across all links in the EtherChannel

A

Load Balanced

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12
Q

What are the 3 terms you could also use in place of EtherChannel?

A

Port Channel
LAG (Link Aggregation)
Link Bundle

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13
Q

What are the 3 types of EtherChannel Protocols?

A

LACP (Link Aggregation Contol Protocol)
PAgP (Port Aggregation Protocol)
Static Ether Channel

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14
Q

Of the three available protocols for EtherChannel, which one is the most preffered?

A

LACP (Link Aggregation Control Protocol)

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15
Q

What do LACP and PAgP have in common?

A

Both sides of the link negotiate the port channel creation and maintenance

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16
Q

What is unique to Static EtherChannel that other two protocols don’t have?

A

The switches do not negotiate the creation and maintenance BUT the settings on both sides still must match for the Port Channel to come up

17
Q

What protocol should you use if LACP isn’t availabe?

A

Static EtherChannel

18
Q

What command do all three protocols use for configuration?

A

channel-group

19
Q

What identical parameters must be in place to have the EtherChannel port come up?

A

Speed and Duplex
Access or Trunk Mode
Native VLAN and allowed VLANs on Trunks
Access VLAN on access ports

20
Q

What two modes can LACP interfaces be set to?

A

Active or Passive

21
Q

With LACP, if SW1s interface is set to Active and SW2s interface is set to Passive, will the port channel come up?

A

Yes

22
Q

With LACP, if SW1s interface is set to Passive and SW2s interface is set to Passive, will the port channel come up?

A

No

23
Q

With LACP, if SW1s interface is set to Active and SW2s interface is set to Active, will the port channel come up?

A

Yes

24
Q

What is the recommended mode for LACP interfaces to be in on both sides of the link?

A

Active

25
Q

What commands would be entered on both switches to create an EtherChannel group using LACP?

A

int range {range}
channel-group 1 mode active
int port-channel 1
switchport mode trunk

26
Q

What two modes would interfaces be set at to configure PAgP?

A

Auto or Desirable

27
Q

With PAgP, what mode(s) must both interfaces be set to for the EtherChannel to come up?

A

Desirable and Auto
OR
Desirable and Desirable

28
Q

With PAgP, if both sides are set to Auto will the EtherChannel come up?

A

No

29
Q

With PAgP, what mode is the most preferrable?

A

Desirable

30
Q

What commands would you use to configure a PAgP EtherChannel group?

A

int range {range}
channel-group 1 mode desirable
int port-channel 1
switchport mode trunk

31
Q

What commands would you use to configure a Static EtherChannel group?

A

int range {range}
channel-group 1 mode on
int port-channel 1
switchport mode trunk

32
Q

What mode would Active or Passive be apart of?

A

LACP

33
Q

What mode would Auto or Desirable be apart of?

A

PAgP

34
Q

What mode would On be apart of?

A

Static EtherChannel

35
Q

What command can be used to verify EtherChannel?

A

show etherchannel summary

36
Q

Multi-Chassis EtherChannel is supported by which 3 technologies?

A

StackWise, VSS (Virtual Switching System) and vPC (Virtual Port Channel)

37
Q

What model of switches can you find StackWise on?

A

Cat 3750, 3850 and the 9000 families

38
Q

What model of switches can you find VSS on?

A

Cat 4500 and 6500 families

39
Q

What model of switches can you find vPC on?

A

Nexus families

CCNA 200-301 (25 decks)

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