Question

You are connecting two multilayer switches, DIST1 and DIST2, with two 10-Gbps links that you want to bundle into a single routed Layer 3 EtherChannel to carry inter-switch routing traffic. On DIST1 you enter the following on the physical interfaces and the port-channel: the interfaces are added to channel-group 1, but the port-channel refuses to form an IP adjacency and 'show etherchannel summary' shows the ports flagged as switchports. Which configuration step ensures the bundle operates as a Layer 3 EtherChannel?

Accepted Answer

Enter 'no switchport' on the member physical interfaces before assigning them to the channel-group, then apply the IP address to the port-channel interface

Answer

Configure 'switchport mode trunk' on the port-channel interface and allow all VLANs across the bundle

Answer

Assign the IP address directly to one of the physical member interfaces rather than the port-channel interface

Answer

Enable 'switchport nonegotiate' on the member interfaces to stop DTP from converting them to access ports