Brocade Fabric OS Troubleshooting and Diagnostics Guide v6.2.0 (53-1001187-01, April 2009)

Fabric OS Troubleshooting and Diagnostics Guide 79

53-1001187-01

Port mirroring

• Ping and traceroute utility

• Performance to determine path characteristics between FCIP endpoints

And finally gather the data from the supportSave -n command.

See Fabric OS Administrator’s Guide or Fabric OS Command Reference for complete details on

these commands

Port mirroring

With port mirroring, you can configure a switch port to mirror the traffic between a specific source

and destination port. This is only supported between F_Ports. This is a useful way to troubleshoot

without bringing down the host and destination links to insert an inline analyzer.

Port mirroring captures traffic between two devices. It mirrors only the frames containing the

SID/DID to the mirror port. Because of the way it handles mirroring, a single mirror port can mirror

multiple mirror connections. This also means that the port cannot exceed the maximum bandwidth

of the mirror port. Attempts to mirror more traffic than what available bandwidth allows will result in

the port mirror throttling the SID/DID traffic so that traffic does not exceed the maximum available

bandwidth.

Use port mirroring to detect missing frames, which may occur with zoning issues or hold timeouts,

capture protocol errors, and capture ULP traffic (SCSI/FICON). This feature cannot be used on

embedded switch traffic.

Port mirroring is only available using the FOS v5.2.0 or later CLI and is not available through Web

Tools. For a complete list of port mirroring commands, see the Fabric OS Command Reference.

To ensure proper failover in HA configurations, both the active and the standby control processors

(CP) must have firmware version 5.2.0 or later installed and running. If the OS on the standby CP

does not support mirroring, failing over the standby CP could cause the HA failover to fail.

Supported hardware

Port mirroring is supported on following platforms:

• Brocade 300

• Brocade 4100

• Brocade 4900

• Brocade 5000

• Brocade 5100

• Brocade 5300

• Brocade 7500

• Brocade 7600

• Brocade 48000 with chassis option 5

• Brocade DCX Backbone

• Brocade DCX-4S Backbone

Port mirroring can be used on the following blades within a chassis:

• FC4-32 32-port blade