Regarding flags, Po1(SU) РІР‚вЂњ S means it is operating at layer 2 and U means it is in use. +-+-+-Р”Р„bove output shows, Port-Channel Po1 has been created, the protocol is LACP and ports Fa0/1 and Fa0/2 are member of theР’В Port-Channel 1 interface. U - in use f - failed to allocate aggregator To verify the EtherChannel, type show etherchannel summary as shown below. Switch-B(config-if-range)#channel-protocol lacp

Switch-B(config-if-range)#channel-group 1 mode active Switch-B(config)#interface range fastEthernet 0/1 - 2 The command channel-group 1 mode active means the physical interfaces Fa0/1 and Fa0/2 will be member of logical EtherChannel interface Port-Channel 1 and the physical ports will actively try to negotiate with remote switch ports to form LACP EtherChannel interface.Р’В Here is same configuration for Switch-B. Switch-A(config-if-range)#channel-protocol lacp Switch-A(config-if-range)#channel-group 1 mode active Switch-A(config)#interface range fastEthernet 0/1 - 2

It is better to start the configuration after shutting down the switch ports to avoid any negotiation issues while configuring LACP. LetРІР‚в„ўs start configuring LACP inР’В Switch-A. The links between the switches are TRUNKS so we have to configure TRUNK in the LACP bundled port as well. We can bundle these two switch ports into one logical EtherChannelР’В using Link Aggregation Control Protocol (LACP) protocol. The switches are connected withР’В two switch ports Fa0/1 and Fa0/2. The diagram below shows a simple scenarioР’В withР’В two Cisco switches, Switch-A and Switch-B. Whereas, in passive mode, the port just waits for remote switch port to initiate LACP negotiation. In active mode, the port actively tries to form LACP EtherChannel with remote switch port. The physical switch ports runningР’В LACP protocol can be either in active or passive mode.

Configure LACP EtherChannel in Cisco IOS Switch In this post, I will show steps toР’В Configure LACP EtherChannel in Cisco IOS Switch. Link Aggregation Control Protocol (LACP) is a industry standard (IEEE 802.3ad) protocol that is used to bundle two or more links and can work with devices from different vendors.Р’В If you are using PAgP protocol then you must use Cisco switches because PAgP is Cisco proprietary protocol. Link Aggregation or Ether Channel is a technology which allows for two or more physical ports to combine into one logical portР’В providing high availability and increased bandwidth.

Configure cisco switch