Dell Brocade G620 Brocade 8.0.1 Fabric OS Command Reference - Page 207

dlsSet dlsSet Enables Dynamic Load Sharing (DLS) without frame loss. Synopsis dlsset dlsset --enable -lossless dlsset --enable -eportbal dlsset --enable -twohop dlsset --disable -lossless dlsset --disable -eportbal dlsset --disable -twohop dlsset --rebalance dlsset --rebalance -all dlsset --help Description Use this command to enable or disable lossless Dynamic Load Sharing (DLS) in the event of a fabric change, to configure DLS without frame loss, and to display the DLS configuration. Use this command to enable or disable the E_Port Balance Priority feature. Enabling E_Port balancing causes the E_Port load to be even across all E_Ports to the same domain. E_Port balancing is disabled by default. Dynamic load sharing optimizes the utilization of the interswitch links (ISLs) by rebalancing the paths going over the ISLs whenever there is a fabric event that may result in a sub-optimal utilization of the ISL. Dynamic rebalancing can be triggered by any one of the following events: • A change in the fabric occurs. • A local E_Port (including trunk ports) goes up or down. • A local Fx_Port goes down. When used without operands, this command enables Dynamic Load Sharing on a switch (legacy DLS behavior). Frames may be lost during reroute operations. If the switch has an exchanged-based routing policy, DLS is enabled by default and this command fails with the following message: "DLS is enabled and cannot be changed with the current routing policy." During the load sharing recomputation, existing routes may be moved to maintain optimal load balance. Frame loss is unavoidable when a port goes down. To prevent frames from being lost during this operation, you can enable DLS without frame loss by issuing this command with the --enable -lossless option. Dynamic load sharing without frame loss is supported in logical fabrics and is configured per logical switch. However, there is a potential impact on other logical switches because they share the same hardware. Chassis permissions are required to configure DLS in a logical fabric environment. Brocade Fabric OS Command Reference 183 53-1004112-02