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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However, note the timing of the system messages:. For cross-stack EtherChannel configurations, ensure that all ports targeted for the EtherChannel are either configured for LACP or are manually configured to be in the channel group. The show etherchannel load-balance command reveals that source MAC address load-balancing is default on the Catalyst Once it did, we can see the state of the EtherChannel has changed to “in use”: A switch decides which member link a frame will traverse by the outcome of a hash function performed against one or more etherchaannel of chsat frame.

As noted, a virtual port-channel interface Port-channel1 has been created to represent the logical link.

Most “explanations” assume the reader ethrchannel what static is, passing it over in their explanation. S1 config port-channel load-balance? Do you have any information how to configure Etherchannel using NAS box? The trunk is useful to pass vlans between switches.

Cisco Switch EtherChannel Configuration – LACP – PAgP

Almost a full three seconds elapsed between the member ports transitioning to the up state and the port-channel interface coming up. Dinger guest January 18, at 2: So the moral of the story is use 2,4,or dheat member Port-channels and your port-channels on distro switches need to use IP based load-balancing. Talal guest May 13, at PAgP, while perfectly able, should probably be disqualified as a legacy proprietary protocol unless you have a specific need stherchannel it such as ancient hardware.


I figured it out! This site uses Akismet to reduce spam. If the last hex character is 1 the last two binary bits are 01 so it will use member number 1. I’m wondering why there is even an option to define which protocol to use with the “channel-protocol etherchannl or “channel-protocol pagp” command since you define the protocol with which mode is used: For example, consider the following topology: Sai guest March 10, at 5: On a 8 member port-channel the load balancing uses the last 3 binary bits.

I’ve often configured etherchannels this way with the one line configuration and it does work without any cheqt.

For comparison, let’s reconfigure the EtherChannel to function without a negtiation protocol “on” mode: That leaves LACP and “on”, both of which have a specific benefit. These protocols manage the channel establishment between the switches:.

EtherChannel considerations By stretch Monday, January 18, at 4: UTC EtherChannel is Cisco’s term for bundling two or more physical Ethernet links for the purposes of aggregating available bandwidth and, to a lesser extent, providing a measure of physical redundancy.

The opposite is true on S2: Interface takes the bubdle mtu that’s why individual interface does not need mtu configured. Comments Dear Sir, if i do not use ethrchannel trunk port command,,then it will work for LACP or not…means i do not use trunk for vlan cheah. 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.


EtherChannel considerations –

EtherChannel provides load-balancing only per frame, not per bit. 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.

Configuring destination MAC load-balancing on S1 is recommended to achieve a more varied distribution of frames and make better use of the available bandwidth.

Hopefully my hex to binary math was right. Rupesh guest November 21, at 3: If the last hex character is F the last two binary bits are 11 so it will use member number 3.

For more information on EtherChannel bandwidth and spanning tree considerations, see Etherchannel costs and failover.

EtherChannel considerations

On a 4 member port-channel shee load balancing uses the last 2 binary bits. On a 4 member PO using mac load-balancing the following is true: Jeremy, everyday when I have spare time at work I’ve been reading your blog, I have to say: Any of these three mechanisms will suffice for most scenarios, however the choice does deserve some consideration.

I was configuring mtu on the interface which I shouldn’t be doing. Alireza guest November 28, at 8: