Configuring EtherChannels Configuring Layer 3 EtherChannels Command or Action Purpose Step 4 no ip address Example: Device(config-if)# no ip address Ensures that there is no IP address assigned to the physical port. Step 5 no switchport Example: Device(config-if)# no switchport Puts the port into Layer 3 mode. Step 6 channel-group channel-group-number mode { auto [ non-silent ] | desirable [ non-silent ] | on } | { active | passive } Example: Device(config-if)# channel-group 5 mode auto Assigns the port to a channel group, and specifies the PAgP or the LACP mode. For mode, select one of these keywords: • auto—Enables PAgP only if a PAgP device is detected.
It places the port into a passive negotiating state, in which the port responds to PAgP packets it receives but does not start PAgP packet negotiation. This keyword is not supported when EtherChannel members are from different switches in the switch stack. • desirable—Unconditionally enables PAgP. It places the port into an active negotiating state, in which the port starts negotiations with other ports by sending PAgP packets. This keyword is not supported when EtherChannel members are from different switches in the switch stack. • on—Forces the port to channel without PAgP or LACP.
In the on mode, an EtherChannel exists only when a port group in the on mode is connected to another port group in the on mode. • non-silent—(Optional) If your device is connected to a partner that is PAgP capable, configures the device port for nonsilent operation when the port is in the auto or desirable mode. If you do not specify non-silent, silent is assumed. The silent setting is for connections to file servers or packet analyzers. This setting allows PAgP to operate, to attach the port to a channel group, and to use the port for transmission. • active—Enables LACP only if a LACP device is detected. It places the port into Configuring EtherChannels 16