Which two command sequences must be configured on a switch to establish a Layer 3 EtherChannel with an open-standard protocol? (Choose two.)
To establish a Layer 3 EtherChannel with an open-standard protocol, the following two command sequences must be configured on a switch:
interface GigabitEthernet0/0/1 channel-group 10 mode <mode>
channel-group command is used to configure the physical interface to be a member of a port-channel group. The
mode option specifies the mode of the EtherChannel. There are four EtherChannel modes:
auto: The interface will only join the EtherChannel if the other end is configured with
on: The interface will unconditionally join the EtherChannel.
active: The interface will actively negotiate with the other end to form an EtherChannel.
passive: The interface will wait for the other end to initiate negotiation.
interface port-channel 10 no switchport ip address 172.16.0.1 255.255.255.0
no switchport command removes the switchport configuration from the interface, converting it from a Layer 2 interface to a Layer 3 interface. The
ip address command is used to assign an IP address and subnet mask to the Layer 3 interface.
Therefore, the correct answers are:
interface GigabitEthernet0/0/1 channel-group 10 mode on D.
interface GigabitEthernet0/0/1 channel-group 10 mode active
Explanation: Option B and D both configure the GigabitEthernet interface to be a member of an EtherChannel group with
mode on and
mode active respectively. Option A configures the interface to be a member of an EtherChannel group with
mode auto, which is not the best option for configuring EtherChannel. Option C configures the port-channel interface with an IP address, but does not configure the GigabitEthernet interface to be a member of an EtherChannel group. Option E configures the port-channel interface to be a Layer 2 trunk interface, which is not what is required for a Layer 3 EtherChannel.