HP StorageWorks MSA 2/8 HP StorageWorks Fabric OS V3.1.x/4.1.x Reference Guide - Page 58

Fabric OS Commands backPort Test for back-end miniswitch to miniswitch links. Synopsis backport [-nframes num][-ports list][-lb_mode mode] [-fr_type type][-extonly enable] Availability Admin Release V4.1.x Description Use this command to test the backplane routing and VC allocation. This test applies to single blade as well as multi-blade systems. The following items are tested: ■ Proper back-end port domain routing setup such that every user port has a valid path to every other user port. If a valid path does not exist between any two user ports then that path will fail to transmit the first frame between the two ports. ■ Proper VC mapping such that an arbitrarily large number of frames may be transmitted without running out of credit. If the VC credit mapping is not correct then the test will fail after enough frames have been sent to exhaust the initial credit. VC mapping is not tested if the extonly operand is enabled. ■ Proper Trunking of backend ports. The frames are sent in bursts. If the trunking is not set up properly the burst of frames will not arrive in order. Note: Since the frames are received without "spinning" first, this test is not as exhaustive as spinFab. 58 Fabric OS Version 3.1.x/4.1.x Reference Guide