HP StorageWorks 2/128 HP StorageWorks Fabric OS 5.3.x administrator guide (569 - Page 216
Assigning a static route, Specifying frame order delivery, SAN Switch and 4/8 SAN Switch
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In the following example, the routing policy for a 400 MP Router is changed from exchange-based to port-based: switch:admin> aptpolicy Current Policy: 3 3: Default Policy 1: Port Based Routing Policy 3: Exchange Based Routing Policy switch:admin> switchdisable switch:admin> aptpolicy 1 Policy updated successfully. switch:admin> switchenable switch:admin> aptpolicy Current Policy: 1 Assigning a static route A static route can be assigned only when the active routing policy is port-based and running on a 4/16 SAN Switch and 4/8 SAN Switch, Brocade 4Gb SAN Switch for HP p-Class BladeSystem, Brocade 4Gb SAN Switch for HP c-Class BladeSystem, SAN Switch 2/8V, SAN Switch 2/16V, SAN Switch 2/32, SAN Switch 4/32, SAN Switch 4/32B, SAN Director 2/128, and 4/256 SAN Director (using configuration option 1). When exchange-based routing is active, you cannot assign static routes. Even if the active routing policy is port-based, you cannot assign static routing to the 4/64 SAN Switch, 400 MP Router, or 4/256 SAN Director (using configuration option 5). To assign a static route, use the uRouteConfig command. To remove a static route, use the uRouteRemove command. NOTE: SAN Switch 2/32, SAN Director 2/128, and 4/256 SAN Director (using configuration option 1): When you enter the uRouteConfig command, two similar warning messages might display if a platform conflict occurs. The first message displays when the static routing feature detects the conflict. The second message displays when the Dynamic Load Sharing feature detects the condition as it tries to rebalance the route. A platform conflict occurs if a static route was configured with a destination port that is currently down. The static route is ignored in this case, in favor of a normal dynamic route. When the configured destination port comes back up, the system attempts to reestablish the static route, potentially causing a conflict. Specifying frame order delivery The order of delivery of frames is maintained within a switch and determined by the routing policy in effect. Following are the frame delivery behaviors for each routing policy. • Port-based routing All frames received on an ingress 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 ingress 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. 218 Routing traffic
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