Configuring EtherChannels. LACP EtherChannels and the ad provider- bridge mode are mutually exclusive. LACP. EtherChannels cannot transmit traffic . Cheatsheet. no comment on–Enable Etherchannel only “Manual On Mode” passive–Enable Switch1(config)# interface port-channel 2. Part of Cisco Networking All-in-One For Dummies Cheat Sheet EtherChannel allows you to take up to eight network ports on your switch and treat them as a.

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Assume we have a Data Room switch providing access to servers.

This switch is connected to a Distribution switch which aggregates traffic from several user access switches. If we connect the two switches together with a single 1Gbps interface, then it could potentially be a bottleneck to traffic from users to servers especially for high-volume applications.

With Etherchannel, we can bundle together up to 8 interfaces to form a single logical link Port-Channel and traffic is load-balanced between all interfaces. In our example above, 4x1Gbps interfaces were bundled together thus forming a 4Gbps pipe from users to servers. This increases bandwidth but also enhances redundancy between the switches.


If you connect the interfaces as shown above without configuring EtherChannel, then a Spanning-tree loop will be detected and 3 out of 4 links will be blocked by Spanning-Tree Protocol. By configuring Etherchannel, the bundle is considered as a single logical interface and there are no ethercuannel tree loops. There are two Etherchannel protocols.

Cisco Switch EtherChannel Configuration – LACP – PAgP

These protocols manage the channel establishment between the switches:. Each protocol listed above has three modes of operation which dictate if the switch will actively seek to form an Etherchannel link or will wait for the other end to form the link. Yes it will work also without trunk on the port-channel. The trunk is useful to pass cheqt between switches.


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Cisco Switch EtherChannel Configuration – LACP – PAgP

Comments Dear Sir, if i do not use the trunk port command,,then it will work for LACP or not…means i do not use trunk for vlan thanks.


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