We'll configure the Acc3 side of the EtherChannel to CD1 first. 1. We're creating a logical interface out of thin air, and so we can't see it as a regular interface. Mode that forces the LAN port to channel unconditionally. In Figure 1, the Port Channel 1 interface is up. If a configuration was changed in the logical interface of the EtherChannel it does not mean that the change will apply to all the member ports of the . Switch (config)#ip default-gateway <ip address>. Will only form a channel if the other end is in desirable mode. […] PAgP. Perform a show run to view the current configuration. Before beginning the link aggregation between switches, verify the existing configuration of the ports that connect the switches to ensure that the ports will successfully join the EtherChannels. There are multiple modes which can be set according to our requirement. Take the time to interconnect some real gear and use the commands to configure and verify EtherChannel. We have minimum requirements for Link Aggregation Control Protocol (LACP) to work. Pings from Switch1 to Switch2 Switch1#ping 192.168.1.2 Type escape sequence to abort. It is best for the reader to know how to work with the Cisco packet . Be sure to subscribe and check out the rest of the series for the rest of the labs! PAgP and LACP will check if the configuration of the interfaces that you use is the same. We need to go a step further and simply take those, up to 8 x 1G Interfaces, and configure link aggregation - EtherChannel. Click General. There are several commands to begin troubleshooting the etherchannel. When this is enabled then the load distribution that is based on the destination and source IP address is also enabled. Verify the configuration with a "show . Here is a link to the first video in the playlist for the Complete GNS3 Labs for CCNA 200-301 Exam: This video is going to show how to configure Layer 3 Etherchannel and briefly discuss layer 3 etherchannel load balancing. Configure IP over the newly-created EtherChannel device by typing smitty chinet at the command line. Firstly, show etherchannel summary can be used to get basic information, such as a list of port channels, the physical links they contain, link up/down status, and protocol type. Configuring an EtherChannel. The determination of how an EtherChannel is setup is the value of the channel-group number mode command. The state of the SEA can be easily determined with these steps: 1. - If you configure an EtherChannel from trunk ports, verify that the trunking mode (ISL or IEEE 802.1Q) is the same on all the trunks. EtherChannel (IEEE 802.3ad) est une technologie d'agrégation de liens qui permet d'assembler plusieurs liens physiques Ethernet identiques en un seul lien logique. Step 1. Verify the trunking and VLAN configuration on the switches. There are a number of commands to verify an EtherChannel configuration. Moreover, it's better to configure the resulting Port-Channel logical interface as Trunk in order to allow VLANs to pass between the switches. To display the LAG Membership page, click Switching / Link Aggregation / LAG Membership in the navigation panel.. Commands that provide information about the . Because ports configured in the on mode do not negotiate, there is no negotiation traffic between the ports. Same mode (access or trunk). Don't forget to set the native VLAN on the new port channel interface. Switch-B#show etherchannel 1 summary. Part 2. Specify the interfaces that compose the EtherChannel group using the interface range interface global configuration mode command. Using the command port - channel - load -balance (dst-mac |sec- mac) command you can configure the Ether Channels. Now run show command to display the etherchannel configurations on Switch-B and Switch-A. - Configure interface Port-Channel1 on both SW1 and SW1 to trunk then verify that the changes you've made on the Port-Channel interface have propagated to the bundled links; Fa0/10, Fa0/11 and Fa0/12. It will also show the traffic load balancing method based on its type, non-IP, IPv4, or IPv6. An example of this configuration is: interface range GigabitEthernet0/1-4 description Member Port channel-group 1 mode active no shutdown. To configure a DG on your Cisco switch: First, make sure the DG is on the same network. DG must have the proper routes to route such packets. Then, enter global configuration mode and issue the following command. Currently EtherChannel is not enabled and some . In this tutorial we will Learn how to configure verify and troubleshoot LACP (Link Aggregation or Ether Channel).Actually Link Aggregation or Ether Channel is a technology very similar to PAgP which allows two or more than two physical ports to combine and provide a new third single logical port which results in high availability and increased bandwidth. † A LAN port in auto mode cannot form an . Before beginning the link aggregation between switches, verify the existing configuration of the ports that connect the switches to ensure that the ports will successfully join the EtherChannels. We can use the 'show etherchannel <channel-group number> port-channel' command to verify link aggregation and our port channel status: A more in depth study occurs in CCNP/CCIE literature. Let us use the same topology for the configuration of EtherChannel. SW1 (config-if) # no shutdown. create a Channel Group and specify the LACP mode. a. Let's take a closer look: Configure these parameters on the port-channel interface. Exam: Cisco 200-301 . DSTR2#sh interfaces port-channel 1 Port-channel1 is up, line protocol is up (connected) Figure 28-1 Typical EtherChannel Configuration. Be sure to subscribe and check out the rest of the series for the rest of the labs!Here is a link to the first v. Adding a Port to a Static LAG. Depending on the platform and for LACP EtherChannel in case of 3850's, you can . Select Add an EtherChannel / Link Aggregation from the list and press Enter. Figure 39-1 Typical EtherChannel Configuration The EtherChannel provides full-duplex bandwidth up to 8 Gb/s (Gigabit EtherChannel) or 80 Gb/s (10-Gigabit EtherChannel) between your switch and another switch or host. SW1 (config) # interface port-channel 1. . That is all the configuration for the EtherChannel to work well on both switches. 8) It is possible to configure an EtherChannel as static, or for it to use either PAgP or LACP to negotiate the EtherChannel connection. . If there are problems, you will also need to be able to troubleshoot and fix them. In my example, I am looking at the information of the GigabitEthernet 0/1 interface. How to Configure and verify EtherChannels Ether channels are designed to provide the fault tolerant high capacity links between servers, routers and switches. LACP Configuration. Finally we included a number of useful commands to verify and troubleshoot Link Aggregation or Port-channel interfaces. . Process to Configure and verify EtherChannel (LACP) LACP link aggregation control protocol defined in 802.3ad. We can see that SW1 has been configured for LACP and SW2 for PAgP, this is never going to work. To add a static LAG member: 1 Open the LAG Membership page.. 2 Click in the LAG row under the specific port number column to toggle the port to the desired LAG number or type the desired number in . Layer 3 EtherChannel Verification We can verify if our layer 3 EtherChannel configuration is working as expected by doing the following commands: First, let's check if we can ping between point-to-point links. Assign each switch a hostname according to the topology diagram. LACP protocol is used to create an EtherChannel between two switches. I - stand-alone s . Verify and Troubleshoot EtherChannel Verify EtherChannel As always, when you configure devices in your network, you must verify your configuration. The range keyword allows you to select several interfaces and configure them all together. Same for layer-3 interfaces. Depending on the state of the port prior to configuration, you may have to disable autonegotiation mode. on. Step 1 - Here we view port-channel that is down by using command show EtherChannel summary. Save Configuration and Reboot. set the Port Channel interface as a trunk. Try to bring up the interface using "ifconfig up". Verify your configuration by using the command: S how EtherChannel Summary. † A LAN port in desirable mode can form an EtherChannel with another LAN port in auto mode. It's best practice to start by shutting down the Interfaces that you're going to be configuring. The determination of how an EtherChannel is setup is the value of the channel-group number mode command. The uplinks go to two separate redundant switches at the core/distribution layer so we need to configure two EtherChannels, one to CD1 and one to CD2. Same configuration you need to do on other switch. The configuration above uses the range option to configure multiple interfaces at once. You cannot configure the on mode with an EtherChannel protocol. (This command will create static ehterchannel on your switch. Create a LACP-based EtherChannel using F0/1 and F0/2 using group number 1, with both switches actively negotiating the EtherChannel protocol. Select the primary Ethernet adapters that you want on your EtherChannel and press Enter. You cannot configure the on mode with an EtherChannel protocol. 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. Ether channel Configuration on switch0 : Switch>enable Switch#configure terminal Enter configuration commands, one per line. This topic gives you the commands to verify, as well as some common EtherChannel network problems and their solutions. The command channel-group 1 mode desirable means interface Fa0/1 and Fa0/2 will be member of logical interface port-channel 1 and ports Fa0/1 . 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 switching loops. A good understanding on how to configure switches using packet tracer. Some VIO servers may have multiple Shared Ethernet Adapters (SEAs). Answer. Click Controller. SW1 (config-if) # no switchport. […] For additional tasks that can be performed after the EtherChannel is configured, see Listing EtherChannels or Link Aggregations. Check the following page ( ) and find out what the following resource record types are used for: • • • • • • • A CNAME MX NS . There are 3 methods to configure EtherChannel in your network: the PAgP and LACP negotiating protocols, or Static mode. View the EtherChannel Summary Information Step 2. How to configure LAG Port Channel from the Web GUI. To check the EtherChannel load balancing algorithm, we can use the command 'show etherchannel load-balance'. Navigate to the Port-Channel1 interface and configure the interface to trunk; afterward verify that the . By default, a port is set to negotiate the encapsulation and to be in the dynamic and desirable mode. Use the command to show EtherChannel port-channel, and a detailed output will be displayed, showing the incompatible PAgP/LACP modes configured on the switches. In this tutorial we will Learn how to configure verify and troubleshoot LACP (Link Aggregation or Ether Channel).Actually Link Aggregation or Ether Channel is a technology very similar to PAgP which allows two or more than two physical ports to combine and provide a new third single logical port which results in high availability and increased bandwidth. For Gigabit EtherChannel, you can configure up to 8 Gbps (8 ports of 1 Gbps), depending on the number of supported Gigabit . Note: STP is required on both ends of the link for this. Back to the Cisco Wireless Section . Use this procedure to configure an EtherChannel. When one side is misconfigured for a static etherchannel the switch will expect to receive the same BPDUs on all ports part of the static etherchannel, if it does not, it puts the ports into errdisable. The EtherChannel provides full-duplex bandwidth of up to 800 Mbps between your switch and another switch or host for Fast EtherChannel on a switch with 24 Fast Ethernet ports. Step Four - EtherChannel Verification; Troubleshooting EtherChannel; Conclusion; Prerequisites. Open configuration window b. Verify the trunks are still working. Set "LAG Mode on next reboot" to "enabled". 8) It is possible to configure an EtherChannel as static, or for it to use either PAgP or LACP to negotiate the EtherChannel connection. b. c. d. EtherChannel PortChannel Ethernet-Channel Channel-group 4. . on. Open configuration window. The interface will have the same configuration that it had before it joined the EtherChannel. Login to padmin. The first step is assigning the physical interfaces to the Etherchannel, with different keywords indicating which protocol is to be used. Let's examine the 3 methods and their differences. Also note that you can choose any channel-group number between 1-255, but both should be same on both switches). 7) After configuring the EtherChannel, verify that all interfaces are in the up/up state. a. All interfaces within an EtherChannel must have same configuration: Same speed and duplex. EtherChannel is enabled by the standardised vendor independent LACP protocol which creates one virtual link out of multiple physical links. Then you actually create the EtherChannel using the Channel-Group command to create a "Virtual Port-Channel Interface" which you'd configure like any other interface. Le but est d' augmenter la vitesse et la tolérance aux pannes entre les commutateurs, les routeurs et . Step 1. Use the interface range command to reduce the number of commands required. One side should at least be in Active Mode. Verify your configuration by using the command: S how EtherChannel Summary Part 4: Implement and Verify an EtherChannel between the switches. We can verify with the "show etherchannel <port-channel number> port-channel" or "show etherchannel summary" command. Step 1: Configure Port Channel 1. a. > Configure and verify EtherChannels; Configure and verify EtherChannels. First, the show interface port-channel command displays the general status of the port channel interface. It is most important that the physical . 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. Besides information on our local switch, you can also see the . Click each button for the steps to troubleshoot the EtherChannel. But when I try to see the same in the show etherchannel portchannel there is no change in the output for Load . To verify: show spanning-tree summary . Enter the show etherchannel load-balance command to verify which information EtherChannel uses to load balance traffic: Switch1# show etherchannel load-balance EtherChannel Load-Balancing Configuration: src-dst-ip EtherChannel Load-Balancing Addresses Used Per-Protocol: Non-IP: Source XOR Destination MAC address IPv4: Source XOR Destination IP . One place to go to verify your EtherChannel bundle is on the switch. Verify EtherChannel is Operational The output of the show etherchannel summary command indicates that the EtherChannel is down. View Port Channel Configuration Step 3: Correct the Misconfiguration Step 4. Step 1. Switch1# show etherchannel load-balance EtherChannel Load-Balancing Operational State (dst-mac): Non-IP: Destination MAC address IPv4 . Login to the machine using console. spanning-tree etherchannel guard misconfig. An EtherChannel consists of individual Gigabit Ethernet links bundled into a single logical link as shown in Figure 39-1. Use the "ping" command to test connectivity. But we can see that it is up-up. Use the show etherchannel summary to see your port-channels. Check out ITProTV's Cisco courses here: Cisco: https://go.it. Configuring EtherChannel with LACP requires the following three steps: Step 1. The ON mode allow the interface to be a part of EtherChannel without any negotiation. Config required on Cisco Switch: The WLC does not support LACP nor PAGP, thus we will need to configure the channel-group mode as on (not negotiated, always on). On the two switches, enter privileged EXEC mode. Task 1: View the Default Configuration. Switch-B(config-if-range)# channel-group 1 mode active. Login to the WLC. The ports and port channels can be re-enabled after EtherChannel is configured.
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