HP StorageWorks 2/140 FW 08.01.00 HP StorageWorks Director and Edge Switch Rel - Page 20

Workaround None. Error can occur if multiple UPM cards are hot inserted too quickly Event 507, Loopback diagnostics port failure, may occur after hot insertion of multiple UPM cards in the Director 2/64. This has only been encountered when cards are inserted at one-minute intervals. This is caused by timing of diagnostics that are run on the newly inserted UPM cards. Workaround To avoid this problem, wait longer than one minute between hot insertion of each UPM card. HP recommends waiting at least two minutes between UPM card hot insertions. If you encounter this error, reseat the UPM card. Support for speed Auto-Negotiate Auto-negotiate is supported. However, HP recommends that the port speed for E_Ports (for Interswitch Links, or ISLs) be set to a specific port speed (1Gb/sec or 2Gb/sec, as appropriate for the speed of the Directors or Edge Switches being connected) instead of to Negotiate. Using a specific port speed decreases the time for a fabric build in response to some perturbation event in the fabric. Similarly, setting a specific port speed for N_Ports also decreases fabric build time. However, setting a specific port speed for N_Ports is not required. There are a few older HBA devices that do not always succeed in logging in to a switch port when the port speed is set for auto-negotiate. Workaround If an older HBA has difficulty logging into a switch port that has its port speed configured as Negotiate, configure that port speed to 1Gb/sec or 2Gb/sec according to the operation speed of the HBA connected to that port. Certain applications do not receive SNMP traps With SNMPv3, users with authentication protocol MD5 do not receive SNMP traps. MGSoft 8.0.0 receives the traps, but MGSoft 9.0.0 does not. Workaround Do not use MD5 or MG-SOFT 9.0.0 to receive SNMP traps. 18