Brocade Communications Systems 8/40 Service Manual download pdf (Page 36)

BCSM IN A NUTSHELL 2008

Page 34 of 44

6.2 PERFORMING ROUTINE MAINTENANCE

MEASURING LATENCY

EFCM may be used to measure latency with the Latency Graphs feature

Latency Graphs show the response time in microseconds (μs) for each LUN communicating with the HBA.

Real time performance data is used to plot the latency graphs.

• Historical data does not exist for latency graphs

Latency is determined by the SCSI inquiry time. A SCSI inquiry is sent from the HBA to the LUN and the

time taken to make the round trip is calculated.

Latency graphs are only available for HBA devices when the following conditions are met:

• The HBA is discovered using in-band discovery

• The HBA and the storage device are in the same zone

FIRMWARE DOWNLOADS

When downloading firmware to a device doing FCIP routing, the FCIP links may be interrupted. The Fabric

OS will indicate if this going to be the case.

When using Fabric Manager to download firmware consider these points:

• Fabric Manager has a firmware repository

• Firmware may be downloaded to multiple switches simultaneously

• There is a built-in FTP server

• Firmware may be downloaded to FDMI-compliant HBAs

CONFIGURATION FILE UPLOADS

Configuration files should be backed up on a regular basis, and archived in the event of a support issue, or

the need to restore zoning, license keys, SNMP, or Fabric Watch settings.

The configupload command is used from the CLI on a B-Series switch.

For an M-Series switch EFCM Basic is used.

USING FABRIC MANAGER FOR MAINTENANCE FUNCTIONS

Fabric Manager can be used to backup, restore and replicate configuration files. It can work with these

protocols:

• FTP

• FCIP

• HTTP(S)

• iSCSI

• FDMI

• FCP

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Brocade Communications Systems 8/40 Service Manual Page 36