Typically, there is only one LAG which contains all the ports. If you have doubts about which driver is the correct one, read the manual page of the driver. If they continue, or are bothersome, you may wish to be sure the device is not conflicting with another device. Before you begin, you should know the model of the card you have, the chip it uses, and whether it is a PCI or ISA card. In addition to the generated kernel module, the ndis.

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If the NIC was detected at boot, the kernel does not need to be recompiled.

Replace bge0 to match the system’s Ethernet interface name. You have to replace dc0dc1and so on, with the correct device for your cards, and the addresses with the proper ones. Check the NIC and the motherboard documentation to determine if that may be the problem. Use kldload 8 to load the new module:. As rootuse ndisgen Diskless Operation with PXE. Once you are sure loae card is supported, you need to determine the proper driver for the card. Note also that entries concerning IPv6 inet6 etc.

With lagg 4it is possible to configure a failover which prefers the Ethernet connection for both performance and security reasons, while maintaining the ability to transfer data over the wireless connection.


When troubleshooting hardware and software configurations, check the simple things first. If all went well, the output should be similar to the following:.

The aggregation protocols supported by the lagg interface determine which ports are used for outgoing traffic and whether or not a specific port accepts incoming traffic. For more information about recompiling your kernel, please see Chapter 8.

For laptop users, it is usually desirable to configure the wireless device as a secondary which is only used when the Ethernet connection is not available.

Link Aggregation and Failover

If a firewall is enabled on FreeBSD but no rules have been defined, the default policy is to deny all traffic, even ping 8. To display the configuration for frrebsd network interfaces on your system, enter the following command:. It has a valid broadcast address, Is your network cable plugged in?

Skip site navigation 1 Skip section navigation 2 Header And Logo. If you configured the network during installation, some lines about the network card s may be already present.

It has a valid subnet mask netmask ; 0xffffff00 is the same as Also, check the network configuration as incorrect network settings can cause slow connections. On the FreeBSD system, create the lagg 4 interface using the physical interfaces fxp0 and fxp1 and bring the interfaces up with an IP address of While this usually works for most hardware, it may not resolve this issue for everyone.


For jic information on available media types for a driver, refer to its manual page.

The loqd value is 0, since adapters may hang with this feature being enabled. This driver supports hardware assisted VLANs. Sometimes performance of the card is poor or below average.

FreeBSD provides the lagg 4 interface which can be used to aggregate multiple network interfaces into one virtual interface in order to provide failover and link aggregation. Adding and configuring a network card is a common task for any FreeBSD administrator.

FreeBSD Manual Pages

Check the output of netstat -rn and make sure there is a valid route to the host. Failover allows traffic to continue to flow as long as at least frewbsd aggregated network interface has an established link. Permission denied error messages are often caused by a misconfigured firewall. The card must be configured as root.