A network engineer is configuring a routed (Layer 3) EtherChannel between Switch-1 and Switch-2 using the Link Aggregation Control Protocol (LACP). On Switch-1, the engineer creates `interface Port-channel 5`, configures `no switchport`, and assigns an IP address. On physical interfaces GigabitEthernet0/1 and GigabitEthernet0/2, the engineer enters `no switchport` and `channel-group 5 mode passive`.
Which combination of commands must be configured on Switch-2 for the routed EtherChannel to successfully form and exchange LACP frames?
- Configure 'no switchport' on interface Port-channel 5 and both physical member interfaces, and set 'channel-group 5 mode active' on the physical interfaces.Answer
- BConfigure 'no switchport' on interface Port-channel 5 and set 'channel-group 5 mode passive' on both physical member interfaces.
- CConfigure 'channel-group 5 mode desirable' on the physical interfaces and enable 'switchport mode trunk' on interface Port-channel 5.
- DConfigure 'no switchport' and assign individual IP addresses directly to physical interfaces GigabitEthernet0/1 and GigabitEthernet0/2, then set 'channel-group 5 mode active'.
Answer
Configure 'no switchport' on interface Port-channel 5 and both physical member interfaces, and set 'channel-group 5 mode active' on the physical interfaces.
To establish an LACP EtherChannel bundle when Switch-1 is configured in passive mode, Switch-2 must be set to active mode so it actively sends LACP negotiation frames. Additionally, converting an EtherChannel to Layer 3 requires disabling switchport features using 'no switchport' on both the logical port-channel and the physical member interfaces.
Step-by-Step Solution
Key Concept
Layer 3 EtherChannel LACP Negotiation and CLI Configuration Requirements