Network Teaming with Cisco Etherchannel
This tutorial will show you how to correctly setup NIC teaming with a Cisco Catalyst Switch using Etherchannel.
1. As you can see in our example we have an ESX server that has 2 x Broadcom Network Cards and 4 x Intel Network Cards. Currently each port is setup to connect to a seperate vSwitch. At the end of this tutorial we want to have all 6 adapters connected to the same vSwitch and all traffic load balanced across the 6 ports.
2. I have edited the vSwitch0 properties and have added all Network cards to the same vSwitch and made each one active. If you have existing network setup on the network cards you must remove them first. This load balancing Etherchannel trunk that we will be creating is designed to carry multiple vlan’s, so each Virtual Machine network or vmkernel port you create can be assigned a specific vlan. For our Etherchannel connection to our Cisco Switch we need to set the Load Balancing Policy to “Route based on IP hash” and Network Failover Detection to “Link status only”.
3. If we go back to our Network Adapters for the ESX server we can see each Network port connected to the same vSwitch0.
4. If we click on Networking for the ESX server we can see our Virtual Machine Port Groups connected to the 1 vSwitch0 which is then etherchanneled across the 6 adapters.
5. Now over to our Cisco Catalyst Switch. First we create a Port Channel and make it a trunk port. Optionally if you have non tagged packets crossing the link you can add the line switchport trunk native vlan xxx (replace xxx with the native vlan number). You can also give the port-channel interface a description if you like. You must also set the Etherchannel mode to src-dst-ip by typing in the following command: port-channel load-balance src-dst-ip in config mode.
6. Lastly we need to add the ports which the ESX server network cards connect to, into the port-channel group we created in the last step. I have optionally turned on flowcontrol in this example and also bpdufiltering (this is to optimize the network for storage traffic, iscsi and nfs, as well as data traffic). Enter this same config for each switch port that connects to your ESX server.
All the tutorials included on this site are performed in a lab environment to simulate a real world production scenario. As everything is done to provide the most accurate steps to date, we take no responsibility if you implement any of these steps in a production environment.