Dell Brocade G620 Brocade 8.0.1 Fabric OS Command Reference - Page 509

linkCost linkCost Sets or displays the Fabric Shortest Path First (FSPF) cost of a link. Synopsis linkcost [[slot/]port [cost]] Description Use this command to set or display the cost of an interswitch link (ISL). The cost of a link is a dimensionless positive number. The Fabric Shortest Path First (FSPF) protocol compares the cost of various paths between a source switch and a destination switch by adding the costs of all the ISLs along each path. FSPF chooses the path with minimum cost. If multiple paths exist with the same minimum cost, FSPF distributes the load among these paths. The default link cost value is 500. When executed without operands, the command displays the current cost of each port on the switch, including non-ISLs. An E_PORT suffix is appended to the interface number of active ISLs. If a static cost is assigned to a port, a STATIC suffix is appended to the link cost. In this case, only the current link cost displays. Use interfaceShow to display both the default and current link costs. Notes This command sets a non-default, "static" cost for any port except EX/VEX ports. Use fcrRouterPortCost to configure EX/VEX ports. The execution of this command is subject to Virtual Fabric restrictions that may be in place. Refer to "Using Fabric OS Commands" and "Command Availability" for details. This command cannot be executed on a logical ISL (LISL). Operands This command has the following operands slot For bladed systems only, specifies the slot number for which to set or display the cost, followed by a slash (/). port Specifies the port number for which to set or display the cost, relative to its slot for bladed systems. Use switchShow to list of valid ports. cost Specifies the static cost of the link connected to the specified port. Recommended cost values are 0 through 32765. Setting static link cost values above 32765 will cause access problems. When you set a link cost value between 32766 and 65534, some parts of the fabric may become inaccessible. When you set the maximum link cost value of 65535, the port will become unusable. In either case, the command displays an appropriate warning message, and you are prompted to continue or to cancel and reissue the command with a lower link cost value. A value of 0 removes the static cost and the port reverts to its default link cost. If cost is not specified, the command displays the current cost of the specified port. Brocade Fabric OS Command Reference 485 53-1004112-02