HP StorageWorks 1606 Brocade Fabric OS Administrator's Guide v6.3.0 (53-100133 - Page 518

21 FC Router port cost configuration FCR WWN: 10:00:00:05:1e:12:e0:00, Dom ID: 100, Info:10.32.156.50 1080::8:60F:FE0C:456A/64 "fcr_7500" EX_Port FID Neighbor Switch Info (WWN, enet IP, name 4 95 10:00:00:05:1e:37:00:45 10.32.156.31 "7500" FCR WWN: 10:00:00:05:1e:12:e0:00, Dom ID: 100, Info: 10.32.156.50, "fcr_Brocade 7500" EX_Port FID Neighbor Switch Info (WWN, enet IP, name 4 95 10:00:00:05:1e:37:00:45 10.32.156.31 "Brocade 7500" 5 95 10:00:00:05:1e:37:00:45 10.32.156.31 "Brocade 7500" 6 95 10:00:00:05:1e:37:00:45 10.32.156.31 "Brocade 7500" FC Router port cost configuration The router port cost is set automatically. This section provides information about the router port cost and describes how you can modify the cost for a port if you want to change the default value. FC routers optimize the usage of the router port links by directing traffic to the link with the smallest router port cost. The FC router port cost is similar to the link cost setting available on E_Ports, which allows you to customize traffic flow. The router port link cost values are either 1000 or 10,000. The router module chooses the router port path based on the lowest cost for each FID connection. If multiple paths exist where one path costs lower than the others, then the lowest cost path is used. If exchange-based routing has not been disabled and multiple paths exist with the same lowest cost, there will be load sharing over these paths. The router port cost feature optimizes the usage of the router port links by directing the traffic to a link with a smaller cost. Every IFL has a default cost. The default router port cost values are: • 1000 for legacy (v5.1 or XPath FCR) IFL • 1000 for EX_Port IFL • 10,000 for VEX_Port IFL The FCR router port cost settings are 0, 1000, or 10,000. If the cost is set to 0, the default cost will be used for that IFL. The FC router port cost is persistent and is saved in the existing port configuration file. Router port cost is passed to other routers in the same backbone. Link costs from the front domain to the translate (xlate) domain remain at 10,000. You can use the lsDbShow from the edge fabric to display these link costs. Port cost considerations The router port cost has the following considerations: • Router port sets are defined as follows: - 0-7 and FCIP Tunnel 16-23 - 8-15 and FCIP Tunnel 24-31 More than two router port sets can exist in a Brocade 48000, Brocade DCX, or Brocade DCX-4S with two FR4-18i blades. 476 Fabric OS Administrator's Guide 53-1001336-01