HP 8/80 Brocade Fabric OS Command Reference Guide v6.1.0 (53-1000599-02, June - Page 457

portCfg 2 modify tunnel_id [arguments] Modifies the properties of the existing FCIP tunnel. This disrupts the traffic on the specified FCIP tunnel for a brief period of time. If IPsec is enabled on the FCIP tunnel, the tunnel cannot be modified. To change it, you must delete and re-create the tunnel. Optional arguments for fciptunnel modify include: -b comm_rate Specifies the committed traffic rate on the FCIP tunnel in Kbps. Valid range is 1,544 to 1,000,000. Specify "0" for an uncommitted tunnel. Uncommitted tunnels compete for bandwidth. Changing com_rate is potentially disruptive. -c 0|1 Disable (0) or enable (1) compression on the existing tunnel. -f 0|1 Disable (0) or enable (1) fastwrite on the existing tunnel. -k timeout Specifies the keep alive timeout, in seconds, for the existing tunnel. Valid timeout values are 8 to 7,200; default is 10. If tape pipelining is enabled, minimum value is 80. -q control_dscp DSCP (DiffServ Code Point) Marking for a tunnel's TCP control connection. Valid range is from 0 to 63 (inclusive). Default value is 0. -Q data_dscp DSCP(DiffServ Code Point) Marking for a tunnel's TCP control connection. Valid range is from 0 to 63 (inclusive). Default value is 0. -M Turns on default QoS mapping in the specified tunnel. Default is off. There are two ways of prioritizing network traffic over FCIP tunnels: Differentiated Services (DSCP) and Layer 2 Class of Service (L2CoS). If the -M option is set, the VC on the FCIP outbound frame is mapped to both a DSCP and L2CoS value. These default values can be modified on a per-FCIP tunnel basis with the fciptunnel qosmap option. The -M option can be turned on or off at anytime. Qosmap settings are unaffected by the -M option. -m time Specifies the minimum retransmit time, in milliseconds, for the existing tunnel. Valid time values are 20 to 5,000; default is 100. -r retransmissions Specifies the maximum retransmissions for the existing tunnel. Values are 1 to 16; default is 8. If tape pipelining is enabled, the default value is calculated based on the minimum retransmit time to ensure that the TCP connection does not time out before the host times out. When changing this value, the value specified must be greater than the calculated value. -s 0|1 Disable (0) or enable (1) selective acknowledgement (SACK) on the existing tunnel. -t 0|1 Disable (0) or enable (1) tape pipelining on the existing tunnel (requires fast write to be turned on as well). Fabric OS Command Reference 431 53-1000599-02