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

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

A single flow is _________________ onto a single port channel interface

A

Load Balanced

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
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

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
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

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
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

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
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

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
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

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
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

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What is the primary benefit of EtherChannel?

A

It groups multiple physical interfaces into a single logical interface

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Does Spanning Tree see the EtherChannel as multiple interfaces?

A

No, it recognized the EtherChannel as one interface

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Traffic will be _________________ across all links in the EtherChannel

A

Load Balanced

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

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

A

Port Channel
LAG (Link Aggregation)
Link Bundle

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What are the 3 types of EtherChannel Protocols?

A

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

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

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

A

LACP (Link Aggregation Control Protocol)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What do LACP and PAgP have in common?

A

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

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
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?

22
Q

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

23
Q

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

24
Q

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

25
What commands would be entered on both switches to create an EtherChannel group using LACP?
*int range {range}* *channel-group 1 mode active* *int port-channel 1* *switchport mode trunk*
26
What two modes would interfaces be set at to configure PAgP?
Auto or Desirable
27
With PAgP, what mode(s) must both interfaces be set to for the EtherChannel to come up?
Desirable and Auto OR Desirable and Desirable
28
With PAgP, if both sides are set to Auto will the EtherChannel come up?
No
29
With PAgP, what mode is the most preferrable?
Desirable
30
What commands would you use to configure a PAgP EtherChannel group?
*int range {range}* *channel-group 1 mode desirable* *int port-channel 1* *switchport mode trunk*
31
What commands would you use to configure a Static EtherChannel group?
*int range {range}* *channel-group 1 mode on* *int port-channel 1* *switchport mode trunk*
32
What mode would Active or Passive be apart of?
LACP
33
What mode would Auto or Desirable be apart of?
PAgP
34
What mode would On be apart of?
Static EtherChannel
35
What command can be used to verify EtherChannel?
show etherchannel summary
36
Multi-Chassis EtherChannel is supported by which 3 technologies?
StackWise, VSS (Virtual Switching System) and vPC (Virtual Port Channel)
37
What model of switches can you find StackWise on?
Cat 3750, 3850 and the 9000 families
38
What model of switches can you find VSS on?
Cat 4500 and 6500 families
39
What model of switches can you find vPC on?
Nexus families