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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For example, an EtherChannel with three active Mbps members will show a bandwidth of Mbps. I was configuring mtu on the interface which I shouldn’t be doing. More cool stuff networking-forum. He is known for his blog and cheat sheets here at Packet Life. So if you were using src-mac load balancing on a layer-3 port-channel all the data would go down the same member, because the packet gets the interfaces source mac.

Only a single line is needed to configure a group of ports as an EtherChannel: By configuring Etherchannel, the bundle is considered as a single logical interface and there are no spanning tree loops. If anyone knows the reason or if anyone has tried or misconfigured it so that you defined the channel-protocol as one thing and the mode as another I would like to know the results. We can inspect the health of the EtherChannel with the show etherchannel summary command:.

Cisco Switch EtherChannel Configuration – LACP – PAgP

So the moral of the story is use 2,4,or 8 member Port-channels and your port-channels on distro switches need to use IP based load-balancing. This switch is connected to a Distribution switch which aggregates traffic from several user access switches.

Once it did, we can see the state of the EtherChannel has changed to “in use”:. I am not sure what I am doing wrong! I want o add 4 more 10 gig links to the bundle to make it 16x Almost a full three seconds elapsed between the member ports transitioning to the up state and the port-channel interface coming up.


For comparison, let’s reconfigure the EtherChannel to function without a negtiation protocol “on” mode:.

On a 4 member port-channel the load balancing uses the last 2 binary bits. Jeremy, everyday when I have spare time at work I’ve been reading your blog, I have to say: 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. EtherChannel provides load-balancing only per frame, not per bit.

Another consideration to make when implementing EtherChannels is the type of load-balancing in effect. Man, that’s some skill It was usefull for me to understand the load balancing feature very well. Dinger guest January 18, at 2: I can write often, or I can write thoroughly. etherchannep

The “show configuration failed” command doesn’t really give any specific reason as to why the link can not be added.

I figured it out! A portchannel may become more balanced with them. This blog entails my own thoughts and ideas, which may not represent the thoughts of Cisco Systems Inc.

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Hi Jeremy, About the last part. I just banged this out real quick. 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.

Cisco Spanning Tree Protocol Discussion. Switchport configurations applied to this interface are replicated to the physical member interfaces. That leaves LACP and “on”, both of which have a specific benefit. I have configured the etherchannel in L2 switch for 2 links but when a single link gets down packet loss is not coming but when the same link comes up i am getting the packet loss can any one suggest how resolve the problem.

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 sjeet. 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. Vishnu guest April 8, at etherchannl Alireza guest November 28, at 8: D – down P – bundled in port-channel I – stand-alone s – suspended H – Hot-standby LACP only R – Layer3 S – Layer2 Xheat – in use f – failed to allocate aggregator M – not in use, minimum links not met u – unsuitable for bundling w – waiting to be aggregated d – default port Number of channel-groups in use: 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.


Note the S indicating layer two operation; on multilayer platforms, EtherChannel interfaces can be configured for routed operation as well.

Cisco Switch EtherChannel Configuration – LACP – PAgP

The show etherchannel load-balance command reveals that source MAC address load-balancing is default on the Catalyst I really like this article,it’s simple but quite good for reference. S2 config-if-range channel-group 1 mode passive Creating a port-channel interface Port-channel 1 When the member ports on both sides of the EtherChannel are enabled, the port-channel interface also transitions to the up state.

If the last hex character is F the last two binary bits are 11 so it will use member number 3. Leave a Reply Cancel reply Your email address will not be published. When configuring etherchannel between two switches, should they have the same number in both ends?