Etherchannel is a feature used to group multiple parallel links into one single logical interface. Etherchannel configuration with example icnd2 200105. Assume physical interfaces gi00 up to gi03 will be used to form an etherchannel. Manually dynamically, using an aggregation protocol to manually configure two ports to join an etherchannel. Cisco ie 3000 software configuration guide, release 12.
Etherchannel has been a part of the cisco ios for many years, so you should find that all your switches support it with proper configuration. In the on mode, a usable etherchannel exists only when a lan port group in the on mode is connected to another lan port group in the on mode. This lab will discuss and demonstrate the configuration and verification of static etherchannel links. The choice of commands available are different more or less based on l2 or l3 state of the ports and yes, no switchport command will do that for you. Software configuration guide, cisco ios xe denali 16. Use the show etherchannel portchannel command to check if the portchannel is active or not. Catalyst 3750x and 3560x switch software configuration guide, release 12. Verify that interfaces fa010, fa011 and fa012 on sw1 formed a pagp etherchannel correctly. The mode you select applies to all etherchannels that you configure on the switch. By configuring etherchannel, we are bundling multiple physical connections between two or more cisco switches into one logically link.
Configure a redundant etherchannel link background three. The channel protocol lacp is not absolutely needed it knows when you add channelgroup x mode active that it is lacp. Etherchannel cisco switches configuration using packet tracer version 6. In a conventional network where stp blocks one link to avoid switching loops, etherchannel forces stp to see both paths or bundled as one logical link while avoiding. So they should all match in the end, but the configuration is done at the portchannel mode. Dell emc networking os10 enterprise edition quick start and. The on mode is the same for the two protocols because the ethernetchannel configuration can be done statically or unconditionally. It allows grouping of several physical ethernet links to create one logical ethernet link for the purpose of providing faulttolerance and highspeed links between switches, routers and servers. Specifically, in this topic, we gonna configure a layer2 etherchannel. Our second switch is already configured up,so were just going to do our configuration here on dswitch1. Etherchannel configuration on cisco switch learn linux. Moreover, its better to configure the resulting portchannel logical interface as trunk in order to allow vlans to pass between the switches.
Configure a layer 3 etherchannel between the dls switches. Catalyst 3750x and 3560x switch software configuration. Configure default routing between dls switches at this point, local routing is support at each distribution layer switch. Configuring an etherchannel link free ccna workbook. Etherchannel configuration pdf free download as pdf file. The etherchannel provides fullduplex bandwidth up to 8 gbs gigabit etherchannel or 80 gbs 10gigabit etherchannel between your switch and another switch or host. To locate and download mibs for selected platforms. Understanding etherchannel load balancing and redundancy. When setting up an etherchannel connection, remember the following points. If negotiations fail, the etherchannel will not pass traffic. Red font color or gray highlights indicate text that appears in the instructor copy only.
Etherchannels can be used to enhance the bandwidth between data centre and wiring closets, you can also apply it anywhere in network where the bottlenecks can possibly occur. Delete the startupconfiguration file and reload the switch using the following commands. Mode that forces the lan port to channel unconditionally. D down p bundled in portchannel i standalone s suspended h hotstandby. Etherchannel configuration pdf network switch internet standards. Download what is etherchannel pagp and lacp modes in pdf click here. This is a manual configuration, and ports on both ends of the etherchannel must have the same configuration. Now i am going to configure ether channel and for this we need atleast two ethernet ports. Manual etherchannel configuration in cisco switches using. I dont know why they have that separate command, maybe someone else can chime in why thats even there. Cisco ccna routing and switching scaling networks 3. Follow along and learn by watching, listening and practicing. Because ports configured in the on mode do not negotiate, there is no negotiation traffic between the ports.
Packet tracer configuring etherchannel instructor version instructor note. Do not be afraid to enable it on a pair of ports and try it. Stp and etherchannel operation and configuration ebook. Ports configured in the on mode do not exchange pagp packets. Etherchannel configuration cisco pdf cisco systems network. Now to provide reachability across the layer 3 etherchannel trunk, configure fully qualified static default routes at dls1 and dls2 that point to each other. How to configure and verify etherchannels ether channels are designed to provide the fault tolerant high capacity links between servers, routers and switches. Few configuration restrictions can make a note that various interfaces cannot be merged in the ethernetchannel i. Etherchannel is a port aggregation feature that allows for the bonding together of two or more switch ports into a logical interface. Layer 2 and layer 3 etherchannels trunking lacp pagp. The configuration, verification, and troubleshooting of etherchannel are discussed. Configure both ends of the etherchannel in the same mode.
The static link aggregation allows the settings of configuration to set up on both lac participating components. Sw1 should actively try to form an etherchannel and sw3 should only respond to requests. The idea is to bundle fastethernet 0 and 014 into an etherchannel but this is not working. Download what is etherchannel in cisco switches and routers in pdf click here. Etherchannel and hsrp free download as powerpoint presentation. Switch ports exchange pagp packets only with partner ports configured in the auto or desirable modes. Configuring etherchannel utilizing pagp free ccna workbook. This command when executed in interface configuration mode sets the channelgroup number and lacp mode to listen for lacp packets but not aggressively and unconditionally form an etherchannel using lacp.
Layer3 etherchannel configuration now in our last topic, we configured a layer2 etherchannel, and that might be very appropriate, if we had end to end vlans in the enterprise, another words, we got vlans in building 1, vlans in building 2 and vlans in building 3, and all the same. Connect the management port to the network if you prefer downloading the image over the network. Configuring etherchannel utilizing lacp free ccna workbook. In aix, there are basically three types of etherchannel adapters that can be configured.
Implementing and troubleshooting etherchannel hack and. Lets look at the first issue wrong etherchannel mode. Link aggregation can be useful when interconnecting switches together and when interconnecting other devices to a switch, e. Etherchannel configuration cisco pdf free download as pdf file. Most configuration settings on an etherchannels member links must be the same, and inconsistent settings will cause link members to become suspended. Etherchannel technique is known as nic teaming in windows and ethernet bridging in linux. Interface fa0 and fa014 are both in use for this etherchannel. L3 etherchannel configuration solutions experts exchange. Etherchannel load balancing can use mac addresses, ip addresses, or layer 4 port numbers with a policy feature card 2 pfc2 and either source mode, destination mode, or both. Keep in mind that the configuration of all physical interfaces has to match.
In this lab, you will configure etherchannel, a form of link aggregation used in switched networks. You have to 1st convert the ports to l3 prior to configuring etherchannel. Also, better to remove existing configuration from physical interface because mismatch in configurations may not allow to form an etherchannel. Cisco 3900 series, cisco 2900 series, and cisco 1900 series integrated services routers generation 2 software configuration guide configuring etherchannel this chapter describes how to configure etherchann els on layer 3 ports on cisco 1900, 2900, and 3900 series isrs. Now lets go over to sw3, and give the mirrored configuration. Now the we talked about the theory of an etherchannel. An etherchannel can be created from between two and eight active fast, gigabit or 10. Ross bagurdes providing redundant layer 2 networks is important in order to provide a resilient and reliable network.
How to configure and verify etherchannels examcollection. Configure the etherchannel between sw1 and sw2 to use destination mac address loadbalancing. Because all that information you type in portchannel configuration mode will be automatically copied to those main physical interfaces. Instructor alright, so here we are in my environment. Layer 2 etherchannel configuration best cisco ccna ccnp. Understanding etherchannel the process used to bundle ports together in an ethernet switch to achieve higher bandwidth is known as etherchannel or link aggregation. Manual channel configuration without using any form of negotiation. Mp4, avc, 1280x720, 30 fps english, aac, 2 ch 2h 47m 468 mbinstructor. Etherchannel manual configuration there are two methods of configuring an etherchannel. Layer3 etherchannel configuration best cisco ccna ccnp. The logical port, with the combined capacity of the individual ports, is then used to carry layer two frames or layer three packets, depending on the configuration. In this lesson well take a look at some common issues with etherchannels.
Catalyst 4500 series switch software configuration. You will configure etherchannel using port aggregation protocol pagp and link aggregation control protocol. You are not allowed to use any protocol for negotiation. For the channel to be formed correctly without stp loops etc. Each etherchannel can consist of up to eight compatibly configured ethernet ports. Use the option that provides the greatest variety in your configuration. In the hypothesis of real random hash algorithm, 2, 4 or 8 ports configurations lead to fair loadbalancing, whereas other configurations. Etherchannel provides faulttolerant highspeed links between switches. The first switch sw1 will be active mode and sw2 will be in passive mode. It allows grouping of several physical ethernet links to create one logical. Both the auto and desirable modes enable ports to negotiate with partner ports to form an etherchannel based on criteria such as port speed.
Download the files the instructor uses to teach the course. Red font color or gray highlights indicate text that appears in the answer copy only. Etherchannel is a port link aggregation technology or portchannel architecture used primarily on cisco switches. About etherchannel configure with fru 00e1854 aix forum.
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