Examkin

Question

Difficulty: HardLayer 2 and Layer 3 EtherChannel (LACP)

A network engineer must manually configure a routed (Layer 3) Link Aggregation Control Protocol (LACP) EtherChannel bundle on a Cisco Catalyst switch using physical member interfaces GigabitEthernet1/0/1 and GigabitEthernet1/0/2. The EtherChannel must use Port-channel 20 and be configured with IP address 10.20.20.1/30. Arrange the CLI configuration commands into the correct execution sequence from top to bottom.

  1. 1interface range GigabitEthernet1/0/1 - 2
  2. 2no switchport
  3. 3channel-group 20 mode active
  4. 4interface Port-channel 20
  5. 5ip address 10.20.20.1 255.255.255.252

Answer

The correct CLI sequence is: 1) interface range GigabitEthernet1/0/1 - 2, 2) no switchport, 3) channel-group 20 mode active, 4) interface Port-channel 20, and 5) ip address 10.20.20.1 255.255.255.252.
To successfully deploy a routed (Layer 3) LACP EtherChannel, physical interfaces must first be selected, configured with 'no switchport' to disable Layer 2 switching, and bound to a channel group using an active LACP mode. Afterwards, the administrator enters the logical port-channel interface context to configure the IP address parameters.

Step-by-Step Solution

1
Select physical member interfaces
Enters interface range configuration mode for GigabitEthernet1/0/1 and GigabitEthernet1/0/2.
Configuration must start at physical interfaces to prepare them before bundling.
2
Convert physical interfaces to Layer 3 routed interfaces
Disables Layer 2 switching capabilities on physical member ports.
Physical member ports of a routed EtherChannel must have 'no switchport' applied before participating in a Layer 3 channel group.
3
Assign interfaces to an active LACP channel group
Creates Port-channel 20 automatically and sets LACP mode to active.
The 'mode active' parameter enables LACP dynamic negotiation on the physical member interfaces.
4
Select logical Port-channel interface
Enters interface configuration mode for Port-channel 20.
Network configuration, including IP addressing, must be applied directly to the logical port-channel container.
5
Configure IP address on Port-channel interface
Assigns IPv4 address 10.20.20.1/30 to Port-channel 20.
Layer 3 EtherChannels hold IP addressing at the port-channel level rather than individual member links.

Key Concept

Layer 3 EtherChannel (LACP) Configuration Sequence
Rate this question

Topics

Layer 2 and Layer 3 EtherChannel (LACP)

More questions from this topic