Before replacing bridges, you should verify bridge and storage connectivity. Familiarizing yourself with the command output enables you to subsequently confirm connectivity after making configuration changes.
node_A_1> run local sysconfig -v NetApp Release 9.3.2X18: Sun Dec 13 01:23:24 PST 2017 System ID: 4068741258 (node_A_1); partner ID: 4068741260 (node_B_1) System Serial Number: 940001025471 (node_A_1) System Rev: 70 System Storage Configuration: Multi-Path HA<=== Configuration should be multi-path HA . . . slot 0: FC Host Adapter 0g (QLogic 8324 rev. 2, N-port, <UP>)<=== Initiator port Firmware rev: 7.5.0 Flash rev: 0.0.0 Host Port Id: 0x60130 FC Node Name: 5:00a:098201:bae312 FC Port Name: 5:00a:098201:bae312 SFP Vendor: UTILITIES CORP. SFP Part Number: FTLF8529P3BCVAN1 SFP Serial Number: URQ0Q9R SFP Capabilities: 4, 8 or 16 Gbit Link Data Rate: 16 Gbit Switch Port: brcd6505-fcs40:1 <List of disks visible to port> ID Vendor Model FW Size brcd6505-fcs29:12.126L1527 : NETAPP X302_HJUPI01TSSM NA04 847.5GB (1953525168 512B/sect) brcd6505-fcs29:12.126L1528 : NETAPP X302_HJUPI01TSSA NA02 847.5GB (1953525168 512B/sect) . . . <List of FC-to-SAS bridges visible to port> FC-to-SAS Bridge: brcd6505-fcs40:12.126L0 : ATTO FibreBridge6500N 1.61 FB6500N102980 brcd6505-fcs42:13.126L0 : ATTO FibreBridge6500N 1.61 FB6500N102980 brcd6505-fcs42:6.126L0 : ATTO FibreBridge6500N 1.61 FB6500N101167 brcd6505-fcs42:7.126L0 : ATTO FibreBridge6500N 1.61 FB6500N102974 . . . <List of storage shelves visible to port> brcd6505-fcs40:12.shelf6: DS4243 Firmware rev. IOM3 A: 0200 IOM3 B: 0200 brcd6505-fcs40:12.shelf8: DS4243 Firmware rev. IOM3 A: 0200 IOM3 B: 0200 . . .