HP StorageWorks 1606 Brocade Fabric OS Administrator's Guide v6.3.0 (53-100133 - Page 107

Frame order delivery, Assigning a static route

Page 107 highlights

Frame order delivery 4 Static routes are not supported on the Brocade 300, 4900, 5410, 5424, 5450, 5460, 5470, 5480, 5100, 5300, 5424, 7500, 7500E, 7600, 7800 and 8000 switches, and the Brocade 48000 or Brocade DCX or DCX-4S enterprise-class platforms. Instead, use the traffic isolation feature to create a dedicated path for interswitch traffic. See "Traffic Isolation Routing" on page 394 for information about this feature. Assigning a static route 1. Connect to the switch and log in as admin. 2. Enter the uRouteConfig command. Example of configuring a route The following example shows how to configure a static route for all traffic coming in from port 1 and addressed to domain 2 to go through port 5: switch:admin> urouteconfig 1 2 5 done. Removing a static route 1. Connect to the switch and log in as admin. 2. Enter the uRouteRemove command. Frame order delivery The order of delivery of frames is maintained within a switch and determined by the routing policy in effect. The frame delivery behaviors for each routing policy are: • Port-based routing All frames received on an incoming port destined for a destination domain are guaranteed to exit the switch in the same order in which they were received. • Exchange-based routing All frames received on an incoming port for a given exchange are guaranteed to exit the switch in the same order in which they were received. Because different paths are chosen for different exchanges, this policy does not maintain the order of frames across exchanges. If even one switch in the fabric delivers out-of-order exchanges, then exchanges are delivered to the target out-of-order, regardless of the policy configured on other switches in the fabric. NOTE Some devices do not tolerate out-of-order exchanges; in such cases, use the port-based routing policy. 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. Most destination devices tolerate out-of-order delivery, but some do not. Fabric OS Administrator's Guide 65 53-1001336-01

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Fabric OS Administrator’s Guide
65
53-1001336-01
Frame order delivery
4
Static routes are not supported on the Brocade 300, 4900, 5410, 5424, 5450, 5460, 5470,
5480, 5100, 5300, 5424, 7500, 7500E, 7600, 7800 and 8000 switches, and the Brocade
48000 or Brocade DCX or DCX-4S enterprise-class platforms. Instead, use the traffic isolation
feature to create a dedicated path for interswitch traffic. See
“Traffic Isolation Routing”
on
page 394 for information about this feature.
Assigning a static route
1.
Connect to the switch and log in as admin.
2.
Enter the
uRouteConfig
command.
Example of configuring a route
The following example shows how to configure a static route for all traffic coming in from port 1 and
addressed to domain 2 to go through port 5:
switch:admin>
urouteconfig 1 2 5
done.
Removing a static route
1.
Connect to the switch and log in as admin.
2.
Enter the
uRouteRemove
command.
Frame order delivery
The order of delivery of frames is maintained within a switch and determined by the routing policy
in effect. The frame delivery behaviors for each routing policy are:
Port-based routing
All frames received on an incoming port destined for a destination domain are guaranteed to
exit the switch in the same order in which they were received.
Exchange-based routing
All frames received on an incoming port for a given exchange are guaranteed to exit the switch
in the same order in which they were received. Because different paths are chosen for
different exchanges, this policy does not maintain the order of frames across exchanges.
If even one switch in the fabric delivers out-of-order exchanges, then exchanges are delivered to
the target out-of-order, regardless of the policy configured on other switches in the fabric.
NOTE
Some devices do not tolerate out-of-order exchanges; in such cases, use the port-based routing
policy.
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. Most destination devices tolerate out-of-order delivery, but some do not.