HP Surestore E Disk Array XP256 HP StorageWorks Multi-protocol Router XPath OS - Page 8

Issue Description Edge fabric switch booting and EX_Ports Certain configuration values and versions of Fabric OS switches in edge fabrics might cause EX_Ports on the Router to be disabled when the switches are rebooted. Evidence of the unexpected disabled EX_Port can be seen in the Router's port display: # switchshow : 7 id AN No_Light disabled EX_PORT (Last error: Failed to init in time) Workaround for switches running FOS 3.x /4.x: • Issue the diagdisablepost command on edge switches connected to Router EX_Ports. • Upgrade edge switches to Fabric OS 3.x/4.x. • Manually enable any disabled EX_Ports when the condition occurs. Edge fabric segmentation If an edge fabric, in which multiple EX_Ports are linked to multiple edge switches, segments into two or more fabrics, all EX_Ports connected to any of the new fabrics resulting from the segmentation will be disabled due to a fabric ID (FID) conflict error. If the edge fabric remerges into a single fabric, the EX_Ports that were disabled remain disabled until enabled administratively. This characteristic is designed to prevent erroneous meta-SAN configurations from forming. Fibre Channel test equipment Fibre Channel test equipment must use a maximum frame size of 2048 bytes or less when used with the MP Router. Fibre Channel HBAs are not affected by this issue, because maximum frame size is typically negotiated during N_Port login (PLOGI). Table 6 FCIP service Issue Serverless backup applications and routed fabrics Description With routed fabrics, serverless backup using SCSI Extended Copy (XCOPY) commands is not supported if the backup server and copy manager reside on different fabrics and the target descriptors in the Extended Copy command contain port IDs (descriptor type codes E1h or E2h). FCIP with Continuous Access EVA, XP, or HSG80 DRM (exchange-based trunking feature) MP Router Fibre Channel over IP (FCIP) ports utilized for Continuous Access EVA, XP, or HSG80 DRM must have the exchange-based trunking feature disabled. Disable exchange trunking across FCIP port processors using the following commands: portCfgFcip -m 2 FCIP portcfgfcip [-m LOAD_BAL (1-exchange, 2-SID_DID, 3-none] The default is 1. The value must be set to 2 or 3 for Continuous Access EVA, XP, or HSG80 DRM. Multiple FCIP Links not supported with Continuous Access EVA or HSG80 DRM Support for multiple FCIP Links between locations was added in XPath 7.0.3b. This feature is supported with Continuous Access XP only. FCIP with Continuous Access All Continuous Access XP configurations using the MP Router require a minimum XP of 45 Mbps IP bandwidth. 8