Interfaces in active mode will actively try to form an etherchannel. Setting up adapter bonding or in cisco speech etherchannel shouldnt be that hard. After executing the above commands i can ping the connected linux server from switch which has four interfaces connected with switch port 27 to 30 and the ip address of the server is 10. In this demonstration, we are going to establish an etherchannel bonding between switches 1 and 2, using three fast ethernet ports on both switches. Ether channels are designed to provide the fault tolerant high capacity links between servers, routers and switches. Etherchannel between a cisco catalyst switch that runs cisco. Port channeling on linux server hosts avi networks. Two ethernet adapters to be aggregated together to form a single ethernet device. Etherchannel load balancing can be based several configurable options which include destination ip, destination mac address, source xor destination ip address, source xor destination mac address, source ip address or source mac address.
Using the command line interface cli red hat enterprise. Feb 15, 2020 5 if configured as trunk links, layer 2 etherchannel must have the same native vlan and have the same vlans allowed on both switches connected to the trunk. How to configure etherchannel port aggregation protocol pagp. Oct 15, 2014 etherchannel overview etherchannel is a cisco technology that enables the aggregation or bundling of switchports into one logical link. It also appears that its configuration syntax is very similar to that of a cisco switch.
For example, a bundle of four switchports into one etherchannel would provide four times the bandwidth coming to. Lets give some verification command, we created an etherchannel to interconnect these two. In red hat enterprise linux 7, the bonding module is not loaded by default. Your etherchannel configuration seems ok to me but the server side is only half of the equation. For example, a bundle of four switchports into one etherchannel would provide four. Verify the link status of the interfaces using the command ethtool. This command when execute in interface configuration mode assigns that particular interface to a channel group number specified and sets the etherchannel mode to unconditional as stated by the on. Etherchannel can provide high availability and increase bandwidth at the same time. How to find the active network inteface on etherchannel unix and. 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. In the linux interface configuration files, a bond interface. Because all that information you type in portchannel configuration mode will be automatically copied to those main physical interfaces.
Configuring an etherchannel use this procedure to configure an etherchannel. To diagnose etherchannel problems on a cisco network, you first must be able to collect information about your switch and its configuration. If your company has an existing red hat account, your organization administrator can grant you access. This blog introduces link aggregation control protocol lacp bonding and. Other bonding modes require configuring the switch to aggregate the links. Available for aix and red hat enterprise linux systems. Select your new etherchannel interface from the list. Jan 19, 2018 to successfully configure etherchannel bonding between two cisco switches using lacp as the aggregation protocol, the following configuration commands are required. Assume physical interfaces gi00 up to gi03 will be used to form an etherchannel. For example, a cisco switch requires etherchannel for modes 0, 2, and 3, but for mode 4 lacp and etherchannel are required. Press enter after changing the desired fields to create the etherchannel. Configuration changes applied to the physical port affect only the port where you apply the configuration.
Moreover, its better to configure the resulting portchannel logical interface as trunk in order to allow vlans to pass between the switches. Using the previous commands, configure the link between s1 and s2 on ports g01 and g02 as an lacp etherchannel. Etherchannel is a port link aggregation technology or portchannel architecture used primarily on cisco switches. Hello, there is a problem in the file nf, you write options bond0 but it is options bonding thanks for this howto. Of course, this must be done on both switches if you configure an etherchannel on one switch and dont do so on the correct ports on the other switch, the line protocol will go down and stay. To change the parameters of all ports in an etherchannel, apply configuration commands to the portchannel interface such commands can be stp commands or commands to configure a layer 2 etherchannel as a trunk. Etherchannel diagnostic information gathering dummies. If negotiations fail, the etherchannel will not pass traffic. Manual etherchannel configuration in cisco switches using. The catalyst 2950 switch commands and configuration in this document are applicable to switches that run. When configuration is complete, the links can be reenabled. If you are a new customer, register now for access to product evaluations and purchasing capabilities. First, a brief overview of what you get from the show command.
Interfaces in passive mode will only respond to lacp requests. Configure network bonding red hat enterprise linux. The show etherchannel portchannel command allows us to dive into the specifics about our portchannel. Now i am going to configure ether channel and for this we need atleast two ethernet ports. Configure ip over the newlycreated etherchannel device by typing smitty chinet at the command line. 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. But because it is sometimes more important for some data to be received rather than sent, cisco gives you a choice. The best command to use is show etherchannel detail. So they should all match in the end, but the configuration is done at the portchannel mode. Use the channelgroup channelgroupnumber mode on interface configuration command in order to manually configure ports to be in the channel group. Configure the port for etherchannel with appropriate mode. By far, the last show command is the most important show command. In this lab you will familiarize yourself with the following commands.
The channel protocol lacp is not absolutely needed it knows when you add channelgroup x mode active that it is lacp. Recovery and failover options recovery and failover features are available for etherchannel or ieee 802. Understanding etherchannel the process used to bundle ports together in an ethernet switch to achieve higher bandwidth is known as etherchannel or link aggregation. Etherchannel is a feature used to group multiple parallel links into one single logical interface. Etherchannel bonding portchannel network redundancy.
In this article we will describe how to configure both lacp and pagp etherchannels on cisco switches. I dont know why they have that separate command, maybe someone else can chime in why thats even there. Link aggregation can be useful when interconnecting switches together and when interconnecting other devices to a switch, e. For crossstack 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. This lesson explains how to configure etherchannel port aggregation protocol pagp. On the linux side, the configuration looks like this. Etherchannel advantages etherchannel is often used between the switches in order to increase the capacity of the connection between them by performing a load balancing of the frames traversing the channel. 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.
How to configure etherchannel on cisco switches hackgyd. Use the command channelgroup 1 mode on on every port you want to be placed into the etherchannel. I am aggregating both of the onboard nics ent0 and ent1 into a new adapter ent2 for failover reasons obviously. Etherchannel overview etherchannel is a cisco technology that enables the aggregation or bundling of switchports into one logical link. So show etherchannel summary, pretty important command. Etherchannel configuration with example icnd2 200105.
To verify the etherchannel lacp configuration you can use either the show etherchannel summary or show etherchannel detail command. There are three different methods to configure etherchannel in cisco switch. Id be interested to know if aix v6 or higher support creating an etherchannel from two etherchannels. Aug 30, 2016 how to create etherchannel or link aggregation in aix. The activebackup, balancetlb and balancealb modes do not require any specific configuration of the switch. In linux this is called bonding, in switches its commonly referred to as a port. The first switch sw1 will be active mode and sw2 will be in passive mode. Etherchannel can use two methods for load balancing cisco device connections, with the default load balancing based on the source mac address of the system sending data. Specifically, in this topic, we gonna configure a layer2 etherchannel. How to setup etherchannel, bonding, or portchannel on cisco switches and linux. Configure network bonding red hat enterprise linux 7. Load sharing balancing is based either on source or destination mac address of the transmitting computers when layer 2 etherchannel is used.
Fill in all of the required fields and press enter. The command channelgroup 1 mode active means the physical interfaces fa01 and fa02 will be member of logical etherchannel interface portchannel 1 and the physical ports will actively try to negotiate with remote switch ports to form lacp etherchannel interface. Bundling multiple switchport ethernet links into one logical channel increases bandwidth as well creating redundancy and fault tolerance. Lab configuring etherchannel topology addressing table. One place to go to verify your etherchannel bundle is on the switch.
Configuring an etherchannel is actually quite simple. This is actually far simpler then it sounds, and can be completed in about ten minutes. Etherchannel configuration on cisco switch learn linux ccna. Etherchannel on cisco ios catalyst switch in this tutorial we. If one of the underlying physical adapters goes down, then the other physical adapter is used to handle the communication traffic. When setting up an etherchannel connection, remember. The ports which are going to be in etherchannel must be in the shutdown state while configuring the etherchannel to prevent loops and other related problems. This section discusses a set of sample port channel configuration files.
Oct 12, 2015 port aggregation protocol pagp also called etherchannel is a cisco proprietary protocol that is used for bundling two or more physical ports into single logical port. This is great for stp redundancy because stp will only need to reconverge if all links within the. Nov 06, 2010 etherchannel advantages etherchannel is often used between the switches in order to increase the capacity of the connection between them by performing a load balancing of the frames traversing the channel. Etherchannel technique is known as nic teaming in windows and ethernet bridging in linux. Jun 17, 2014 in linux, using etherchannel bonding you can combine two or more physical network interfaces nic together to create a virtual interface. And by layer2 means that the logical port we going to create, its going to appear like, its a switch port.
Catalyst 3750x and 3560x switch software configuration. This gives you a lot of information but im particularly interested in seeing if lacp is configured for passive or active mode. To successfully configure etherchannel bonding between two cisco switches using lacp as the aggregation protocol, the following configuration commands are required. Contact us the unix and linux forums unix commands, linux commands, linux server, linux ubuntu. Etherchannel allows multiple physical fast ethernet or gigabit ethernet links to be combined into one logical channel.
You can load the module by issuing the following command as root. Linux centos6 adapter bonding cisco 2960s etherchannel lacp. I recommend using the range command in cisco ios to. When an etherchannel has been configured on aix, using a primary and a backup adapter for failover purposes, it is possible to force a failover between these adapters.
You want to be able to read through that output inside and out, up and down, side to side without a problem. Do not be afraid to enable it on a pair of ports and try it. On the server, run smitty etherchannel, select hash mode 802. Sep 05, 2017 use the show etherchannel portchannel command to display information about a specific port channel interface. To perform this task, you, as always, rely on the show and debug commands. This blog introduces link aggregation control protocol lacp bonding and provides stepbystep configuration of lacp bonding on red hat enterprise linux rhel and centos operating systems versions 6 and 7. Layer3 etherchannel configuration best cisco ccna ccnp. Etherchannel is a technology that lets you bundle multiple physical links into a single logical link. I did failover from primary to backup adapter, but now i am not able to switch it back to primary. There is another vlan configured on switch vlan 100 10. Same is true for the linux box itself, approx only half of the hosts can be pinged.
Part 1 defines what etherchannel is and cases for using it in your networks from a nontechnical perspective. 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. When setting up an etherchannel connection, remember the following points. Cisco eigrp cli commands and configuration examples. Physical topology diagram visual topology command list task 1. Channelgroup id mode passive configures an interface as etherchannel bundle members using lacp in passive mode. 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. Configuring an etherchannel link free ccna workbook. For example, ent0 and ent1 can be aggregated into an etherchannel adapter called ent3. In linux, using etherchannel bonding you can combine two or more. To change the parameters of all ports in an etherchannel, apply configuration commands to the portchannel interface such commands can be stp commands or. How to setup linux etherchannel bonding for network interface ha.
Use the show etherchannel summary command to view the overall status and general port channel information. This is very helpful if we are running layer three down to the access layer switches, instead of at the distribution layer. How to configure etherchannel port aggregation protocol. I was testing network performance and wanted to add these to a script, so i could test standalone adapter configurations vs etherchannel configurations, and leave my scripts running over night. Overview of bonding modes and the required settings. With this, we come to the end of our chapter on the ether channel. Configuring etherchannel utilizing lacp free ccna workbook. Sep 09, 2016 i needed to create some etherchannel devices on several aix lpars, and did not want to go through the smit panels every time. The last command that we can use to verify the status of an etherchannel, is the show etherchannel summary command and it will give information pertaining the configured etherchannels on the switch, the output of this command on ds2 is shown below.
Use the show interfaces etherchannel command to provide information about the role of the interface in the etherchannel. Etherchannel configuration on linux creating ether channel on linux creating an etherchannel between a red hat enterprise 5 server, and a cisco catalyst 3750 switch. I am aggregating both of the onboard nics ent0 and ent1 into a new ad the unix and linux forums. About etherchannel configure with fru 00e1854 aix forum forum. The ip address will be configured on this virtual interface. Etherchannel configuration on cisco switch learn linux. Etherchannel configuration visual topology command list command description channelgroup id mode active configures an interface as etherchannel bundle members using lacp in active mode. Lacp how to configure network bonding in linux backdrift. How to setup linux etherchannel bonding for network. An etherchannel is a link aggregation technology whereby two switches are connected together with multiple interfaces which are bundled together to form a single logical interface portchannel therefore increasing bandwidth between the switches. To change the parameters of all ports in an etherchannel, apply configuration commands to the portchannel interface, for example, spanningtree commands or commands to configure a layer 2 etherchannel as a trunk. How to configure etherchannel port aggregation protocol pagp in. Red font color or gray highlights indicate text that appears in the answer copy only.
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