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7-4 Web Tools Administrator’s Guide
Publication Number: 53-0000522-09
Specifying Frame Order Delivery
7
To configure the DLS setting
1. Launch the Switch Admin module as described on page 4-3.
2. Click the Routing tab.
3. Click On in the Dynamic Load Sharing area to enable dynamic load sharing.
Click Off in the Dynamic Load Sharing area to disable dynamic load sharing.
Note that when device-based or exchange-based routing policies are in effect, the DLS radio
buttons do not display in the Routing tab
4. Click Apply.
Specifying Frame Order Delivery
In a stable fabric, frames are always delivered in order, even when the traffic between switches is shared
among multiple paths. However, when topology changes occur in the fabric (for example, if a link goes
down), traffic is rerouted around the failure, and some frames could be delivered out of order.
By default, frame delivery is out-of-order across topology changes. However, if the fabric contains
destination devices that do not support out-of-order delivery, you can force in-order frame delivery
across topology changes.
Enabling in-order delivery (IOD) guarantees that frames are either delivered in order or dropped. For
more information regarding IOD, refer to the Fabric OS Administrator’s Guide.
When you enable or disable IOD for the SilkWorm 12000 director or for a SilkWorm 24000 or 48000
configured for two logical switches, it is on a logical-switch basis. This means that for each logical
switch, you enable or disable IOD individually.
To configure the IOD setting
1. Launch the Switch Admin module as described on page 4-3.
2. Click the Routing tab.
3. Click On in the In-Order Delivery area to force in-order frame delivery across topology changes.
Click Off in the In-Order Delivery area to restore out-of-order frame delivery across topology
changes.
4. Click Apply.
Configuring Link Cost
When you configure link cost for the SilkWorm 12000 director, or for a SilkWorm 24000 or 48000
configured for two logical switches, it is on a logical-switch basis. This means that for each logical
switch, you configure link cost individually.
Note
Enabling in-order delivery can cause a delay in the establishment of a new path when a topology change
occurs, and therefore should be used with care.