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Netwrk-2 > Mod6.1: EtherChannel > Flashcards

Mod6.1: EtherChannel Flashcards

1
Q

____ will block redundant links to prevent switching loops, as shown in the figure

A

Spanning Tree Protocol (STP)

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2
Q

__ is needed that allows redundant links between devices that will not be blocked by STP. That technology is known as ___

A

link aggregation technology
EtherChannel

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3
Q

_____ is a link aggregation technology that groups multiple physical Ethernet links together into one single logical link.

A

EtherChannel

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4
Q

EtherChannel is used to provide ___, ___, ___, and __ between switches, routers, and servers

A

fault-tolerance
load sharing
increased bandwidth
redundancy

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5
Q

EtherChannel technology was originally developed by Cisco as a LAN switch-to-switch technique of grouping several ____ ports into one logical channel.

A

Fast Ethernet or Gigabit Ethernet

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6
Q

When an EtherChannel is configured, the resulting virtual interface is called a ____.

A

port channel

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7
Q

ADVANTAGES OF ETHERCHANNEL: Most configuration tasks can be done on the EtherChannel interface instead of on ___, ensuring configuration consistency throughout the links.

A

each individual port

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8
Q

ADVANTAGES OF ETHERCHANNEL:
no need to upgrade the link to a ____connection to have more bandwidth

A

faster and more expensive

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9
Q

ADVAN. OF ETHERCHANNEL:
___ takes place between links that are part of the same EtherChannel.

A

Load balancing

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10
Q

ADVAN. OF ETHERCHANNEL:
Depending on the hardware platform, one or more load-balancing methods can be implemented. These methods include ___ load balancing, or ___load balancing, across the physical links.

A

source MAC and destination MAC
source IP and destination IP

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11
Q

ADVAN. OF ETHERCHANNEL:
EtherChannel creates an aggregation that is seen as ____. When several EtherChannel bundles exist between two switches, STP may block one of the bundles to prevent switching loops.

A

one logical link

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12
Q

ADVAN. OF ETHERCHANNEL:
When STP blocks one of the redundant links, it blocks the ____. This blocks all the ports belonging to that EtherChannel link.

A

entire EtherChannel

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13
Q

ADVAN. OF ETHERCHANNEL:
Where there is only one EtherChannel link, all physical links in the EtherChannel are active because STP sees ____

A

only one (logical) link

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14
Q

ADVAN. OF ETHERCHANNEL:
EtherChannel provides ___ because the overall link is seen as one logical connection.

A

redundancy

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15
Q

ADVAN. OF ETHERCHANNEL:
Additionally, the loss of one physical link within the channel does not create a change in the topology. Therefore, a spanning tree recalculation is ____

A

not required

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16
Q

ADVAN. OF ETHERCHANNEL:
Assuming at least one physical link is present; the EtherChannel remains functional, even if its overall throughput ____ because of a lost link within the EtherChannel

A

decreases

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17
Q

IMPLEMENTATION RESTRICTIONS:
Choose the correct ans:
a. Interfaces can be mixed such that Fast Ethernet and Gigabit Ethernet can be mixed within a single EtherChannel
b. Interfaces cannot be mixed

A

b
Interface types cannot be mixed. For example, Fast Ethernet and Gigabit Ethernet cannot be mixed within a single EtherChannel.

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18
Q

IMPLEMENTATION RESTRICTIONS:
Currently each EtherChannel can consist of up to ____ compatibly-configured Ethernet ports. EtherChannel provides full-duplex bandwidth up to___ Mbps (Fast EtherChannel) or ___ Gbps (Gigabit EtherChannel) between one switch and another switch or host.

A

eight
800 Mbps
8 Gbps

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19
Q

IMPLEMENTATION RESTRICTIONS:
The Cisco Catalyst 2960 Layer 2 switch currently supports up to ___ EtherChannels. But some support more than that

A

six

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20
Q

IMPLEMENTATION RESTRICTIONS:
Choose the correct answer:
a. The indiv EtherChannel grp member port config must be consistent on both devices
b. The indiv EtherChannel grp member port can have different config.

A

A.
If the physical ports of one side are configured as trunks, the physical ports of the other side must also be configured as trunks within the same native VLAN. Additionally, all ports in each EtherChannel link must be configured as Layer 2 ports.

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21
Q

IMPLEMENTATION RESTRICTIONS:
Each EtherChannel has a logical port channel interface. A configuration applied to the port channel interface affects all ___interfaces that are assigned to that interface.

A

physical

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22
Q

AutoNegotiation Protocols:
EtherChannels can be formed through negotiation using one of two protocols:

A

Port Aggregation Protocol (PAgP)
Link Aggregation Control Protocol (LACP)

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23
Q

These protocols allow ports with similar characteristics to form a channel through dynamic negotiation with adjoining switches.

A

Port Aggregation Protocol (PAgP) or Link Aggregation Control Protocol (LACP)

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24
Q

___ is a Cisco-proprietary protocol that aids in the automatic creation of EtherChannel links

A

PAgP (pronounces “Pag-P)

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25
Q

When an EtherChannel link is configured using PAgP, PAgP packets are sent between___to negotiate the forming of a channel.

A

EtherChannel-capable ports

26
Q

When PAgP identifies matched Ethernet links, it groups the links into an ___.

A

EtherChannel

27
Q

The EtherChannel is then added to the __as a single port.

A

spanning tree

28
Q

When enabled,__also manages the EtherChannel. It checks for configuration consistency and manages link additions and failures between two switches. It ensures that when an EtherChannel is created, all ports have the same type of configuration.

A

PAgP

29
Q

In EtherChannel, is it mandatory that all ports have the same speed, duplex setting, and VLAN info?

A

YES! Any port-channel modification after the creation of the channel also changes the aggregated channel ports.

30
Q

PAgP helps create the EtherChannel link by detecting the __ of each side and ensuring that links are compatible so that the EtherChannel link can be enabled when needed.

A

configuration

31
Q

PAg-P mode:
This mode forces the interface to channel without PAgP. Interfaces configured in the ** mode do not exchange PAgP packets.

A

On

32
Q

PAg-P mode:
This PAgP mode places an interface in an active negotiating state in which the interface initiates negotiations with other interfaces by sending PAgP packets.

A

PAg-P desirable

33
Q

PAg-P mode:
This PAgP mode places an interface in a passive negotiating state in which the interface responds to the PAgP packets that it receives but does not initiate PAgP negotiation.

A

PAgP auto

34
Q

The modes must be compatible on each side. If one side is configured to be in auto mode, it is placed in a ___state, waiting for the other side to initiate the EtherChannel negotiation.

A

passive

34
Q

The modes must be compatible on each side. If one side is configured to be in auto mode, it is placed in a ___state, waiting for the other side to initiate the EtherChannel negotiation.

A

passive

35
Q

If the other side is also set to auto, the negotiation ___

A

never starts and the EtherChannel does not form

36
Q

If all modes are disabled by using the no command, or if ____ is configured, then the EtherChannel is disabled.

A

no mode

37
Q

The ___ mode manually places the interface in an EtherChannel, without any negotiation. It works only if the other side is also set to **.

A

on

38
Q

If one side is on and the other side is set to negotiate parameters through PAgP,___ because the side that is set to on mode does not negotiate.

A

no EtherChannel forms

39
Q

___ between the two switches means there is no checking to make sure that all the links in the EtherChannel are terminating on the other side, or that there is PAgP compatibility on the other switch.

A

No negotiation

40
Q

PAgP Modes:
S1 S2 Channel Establishment
On On

A

Yes

41
Q

PAgP Modes:
S1 S2 Channel Establishment
On Desirable/Auto

A

No

42
Q

PAgP Modes:
S1 S2 Channel Establishment
Desirable Desirable

A

YES

43
Q

PAgP Modes:
S1 S2 Channel Establishment
Desirable Auto

A

Yes

44
Q

PAgP Modes:
S1 S2 Channel Establishment
Auto Desireable

A

Yes

45
Q

PAgP Modes:
S1 S2 Channel Establishment
Auto Auto

A

No

46
Q

__ is part of an IEEE specification (802.3ad) that allows several physical ports to be bundled to form a single logical channel

A

LACP

47
Q

LACP allows a switch to negotiate an ___ by sending LACP packets to the other switch

A

automatic bundle

48
Q

t performs a function similar to PAgP with Cisco EtherChannel. Because LACP is an IEEE standard, it can be used to facilitate EtherChannels in __ environments. On Cisco devices, both protocols are supported.

A

multivendor

49
Q

LACP is now defined as:
a. IEEE 802.3ad
b. IEEE 802.1AX

A

B
LACP was originally defined as IEEE 802.3ad. However, LACP is now defined in the newer IEEE 802.1AX standard for local and metropolitan area networks.

50
Q

LACP MODES:
This mode forces the interface to channel without LACP. Interfaces configured in the ** mode do not exchange LACP packets.

A

ON

51
Q

LACP MODES:
This LACP mode places a port in an active negotiating state. In this state, the port initiates negotiations with other ports by sending LACP packets.

A

LACP active

52
Q

LACP MODES:
This LACP mode places a port in a passive negotiating state. In this state, the port responds to the LACP packets that it receives but does not initiate LACP packet negotiation.

A

LACP Passive

53
Q

LACP allows for ___active links, and also___standby links. A standby link will become active should one of the current active links fail.

A

eight
eight

54
Q

LACP Modes
S1 S2 Channel Establishment
ON ON

A

Yes

55
Q

LACP Modes
S1 S2 Channel Establishment
ON Active/Passive

A

No

56
Q

LACP Modes
S1 S2 Channel Establishment
Active Active

A

Yes

57
Q

LACP Modes
S1 S2 Channel Establishment
Active Active

A

Yes

58
Q

LACP Modes
S1 S2 Channel Establishment
Active Passive

A

Yes

59
Q

LACP Modes
S1 S2 Channel Establishment
Passive Active

A

Yes

60
Q

LACP Modes
S1 S2 Channel Establishment
Passive Passive

A

No

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