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Fibre Channel (SAN) Technical Documents

Commands for basic FOS troubleshooting

by Anonymous on ‎03-25-2010 12:29 AM (339 Views)


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There are lots of brocade commands that come handy when troubleshooting a fabric related problems. We divide these into

Marginal Links

switchshow - Indicators like no light or In_sync will be displayed

portshow <port> - Provides report on errors on a port

porterrshow - provides gist of port errors, look for delta of counters

portstatsshow <port> - Provides details of port errors

portstats64show - Extension of portstatsshow when 32 bit counters do not suffice, look for tim_txcrd_z to observe BB_credit deltas

fabriclog -s - Helps isolate flapping ports, look out for offline and online sequences

sfpshow - Provides information on SFP and their state, check for power


cfgshow - Displays zoning configuration

defzone --show  - Shows default zone settings

nsshow -t - Display name server entries with additional details

nodefind <alias> - To find specific device in fabric

nodefind <WWPN> - To find specific device in fabric

fcping <initiator> <target> - helps isolate end to end device connectivity and also an easy method to validate zoning



Firmware Download





configdefault - To reset switch configuration to default

configdownload - To download a previously uploaded config file

switchshow - Lists connection information as well first indicator of fabric segmentations

errshow -r - Look for config events, match events with list in Brocade Message reference guide for suitable actions

fabstatsshow - flags any parameter mismatch during merging

fabricshow - Helps identify domain id conflicts and gives an overview of all fabric members

configure - To set correct switch and flow control parameters

portcfgshow <port number> - Display port configuration

portcfgspeed <port number> - Set or show port speed

portcfgdefaults <port number> - Set port settings to default

portcfgpersistentenable <port> - To enable port permanently

portcfgpersistentdisable <port> - To disable port persistently (across reboots)



portcfgeport - Disable E port

portcfglport - Lock port to L port

portcfggport - Lock port to E or F port

Log collection