Link Aggregation

What is the most cost-effective method of solving interface congestion that is caused by a high level of traffic between two switches?

• increase uplink speed

• insert a router between the switches

• aggregate ports by using EtherChannel

• add more VLANs to reduce broadcast domains

Which statement describes an EtherChannel implementation?

• EtherChannel operates only at Layer 2.

• PAgP cannot be used in conjunction with EtherChannel.

• A trunked port can be part of an EtherChannel bundle.

• EtherChannel can support up to a maximum of ten separate links.

What is an advantage of using LACP?

• allows automatic formation of EtherChannel links

• decreases the chance of a spanning-tree loop

• increases redundancy to Layer 3 devices

• decreases the amount of configuration that is needed on a switch for EtherChannel

Refer to the exhibit. The administrator tried to create an EtherChannel between S1 and the other two switches via the commands that are shown, but was unsuccessful. What is the problem?

• Traffic can only be sent to two different switches if EtherChannel is implemented on Gigabit Ethernet interfaces.

• Traffic can only be sent to two different switches if EtherChannel is implemented on Layer 3 switches.

• Traffic cannot be sent to two different switches through the same EtherChannel link.

• Traffic cannot be sent to two different switches, but only to two different devices like an EtherChannel-enabled server and a switch.

Refer to the exhibit. An EtherChannel was configured between switches S1 and S2, but the interfaces do not form an EtherChannel. What is the problem?

• The interface port-channel number has to be different on each switch.

• The switch ports were not configured with speed and duplex mode.

• The switch ports have to be configured as access ports with each port having a VLAN assigned.

• The EtherChannel was not configured with the same allowed range of VLANs on each interface.

Which three options must match in order to establish an EtherChannel between two directly connected switches? (Choose three.)

• speed of the interfaces that are used for EtherChannel

• duplex settings of the interfaces that are used for EtherChannel

• domain names on the switches

• port security settings on the interfaces that used for EtherChannel

• VLAN memberships of the interfaces that are used for EtherChannel

EtherChannel protocol that can be used by Cisco,Aruba and Dell devices .

• PAgP

• LACP

Which statement describes a characteristic of EtherChannel?

• It can combine up to a maximum of 4 physical links.

• It can bundle mixed types of 100 Mb/s and 1Gb/s Ethernet links.

• It consists of multiple parallel links between a switch and a router.

• It is made by combining multiple physical links that are seen as one link between two switches .

A network administrator is configuring an EtherChannel link between switches SW1 and SW2 by using the command



SW1(config-if-range)# channel-group 1 mode passive.

Which command must be used on SW2 to enable this EtherChannel?

• SW2(config-if-range)# channel-group 1 mode auto

• SW2(config-if-range)# channel-group 1 mode active

• SW2(config-if-range)# channel-group 1 mode passive

• SW2(config-if-range)# channel-group 1 mode desirable

This command is used to check what port channels are configured on a switch.

• show interfaces fa0/2 etherchannel

• show interfaces port-channel1

• show etherchannel summary

• show etherchannel port-channel