< Day Day Up > |
Sun Trunking™ software provides the ability to aggregate multiple links between a pair of devices so that they work in parallel as if they were a single link. Once aggregated, these point-to-point links operate as a single highly available "fat pipe," providing increased network bandwidth as well as high availability. For a given link level connection, trunking enables you to add bandwidth up to the maximum number of network interface links supported. Note Sun Trunking is not included with the Solaris operating system. This is an unbundled software product. Sun Trunking provides trunking support for the following network interface cards:
The key to enabling the trunking capability is the nettr command. This command can be used to trunk devices of the same technology together. Once trunked, a trunk head interface is established, and that interface is used by ifconfig to complete the configuration. For example, if the two qfe instances (qfe0 and qfe1) need to be trunked, once the nettr command is complete, the trunk head would be assigned to qfe0. Then you could proceed to ifconfig to make the trunk operate under the TCP/IP protocol stack. Trunking ConfigurationThe nettr(1M) utility is used to configure trunking. nettr(1M)can be used to:
Following is the command syntax for nettr for setting up a trunk or modifying the configuration of the trunk members. The items in the square brackets are optional. nettr -setup head-instance device=<qfe | ce | ge> members=<instance,instance,.,.> [ policy=<number> ] Trunking PoliciesMAC
Round-Robin
IP Destination Address
IP Source Address/IP Destination Address
For example, you might have a cluster of servers providing network services in which each service is associated with a virtual IP address over a given interface. If a service associated with an interface fails, the virtual IP address migrates to a physical interface on a different machine in the cluster. In such an arrangement, the IP Source Address/IP Destination Address policy gives you a greater chance of using more different links within the trunk than would the IP Destination Address policy. |
< Day Day Up > |