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Fabric OS Administrator’s Guide
53-1002446-01
Supported configurations for bottleneck detection
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Supported configurations for bottleneck detection
Note the following configuration rules for bottleneck detection:
•
Bottleneck detection is supported only on Fibre Channel ports and FCoE F_Ports.
•
Bottleneck detection is supported only on the following port types:
-
E_Ports
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EX_Ports
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F_Ports
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FL_Ports
•
F_Port and E_Port trunks are supported.
•
Long distance E_Ports are supported.
•
FCoE F_Ports are supported.
•
Bottleneck detection is supported on 4-Gbps, 8-Gbps, and 16-Gbps platforms, including
10-Gbps speeds.
•
Bottleneck detection is supported in Access Gateway mode.
•
Bottleneck detection is supported whether Virtual Fabrics is enabled or disabled. In VF mode,
bottleneck detection is supported on all fabrics, including the base fabric. See
“Virtual Fabrics
considerations for bottleneck detection”
on page 301 for additional information on using
bottleneck detection in VF mode.
Limitations of bottleneck detection
Using this feature for latency bottleneck detection is not recommended for link utilizations above
85%.
The bottleneck detection feature detects latency bottlenecks only at the point of egress, not
ingress. For example, for E_Ports, only the traffic egressing the port is monitored. For FCoE ports,
bottleneck detection monitors traffic going from the FC side to the CEE side, and does not monitor
traffic going in the reverse direction.
High availability considerations for bottleneck detection
The bottleneck detection configuration is maintained across a failover or reboot; however,
bottleneck statistics collected are lost.
Upgrade and downgrade considerations for bottleneck detection
The bottleneck detection configuration is persistent across firmware upgrades and downgrades.
The sub-second latency criterion parameter settings are not preserved on downgrade to firmware
versions earlier than Fabric OS 7.0.0. If you downgrade and then upgrade back to Fabric OS 7.0.0,
the settings revert to their default values.
Summary of Contents for Fabric OS v7.0.1
Page 1: ...53 1002446 01 15 December 2011 Fabric OS Administrator s Guide Supporting Fabric OS v7 0 1 ...
Page 22: ...xxii Fabric OS Administrator s Guide 53 1002446 01 ...
Page 26: ...xxvi Fabric OS Administrator s Guide 53 1002446 01 ...
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Page 38: ...xl Fabric OS Administrator s Guide 53 1002446 01 ...
Page 40: ...2 Fabric OS Administrator s Guide 53 1002446 01 ...
Page 214: ...176 Fabric OS Administrator s Guide 53 1002446 01 Management interface security 7 ...
Page 228: ...190 Fabric OS Administrator s Guide 53 1002446 01 Brocade configuration form 8 ...
Page 248: ...210 Fabric OS Administrator s Guide 53 1002446 01 Validating a firmware download 9 ...
Page 334: ...296 Fabric OS Administrator s Guide 53 1002446 01 Setting up TI over FCR sample procedure 12 ...
Page 360: ...322 Fabric OS Administrator s Guide 53 1002446 01 Encryption and compression example 14 ...
Page 404: ...366 Fabric OS Administrator s Guide 53 1002446 01 ...
Page 430: ...392 Fabric OS Administrator s Guide 53 1002446 01 Ports on Demand 18 ...
Page 502: ...464 Fabric OS Administrator s Guide 53 1002446 01 Buffer credit recovery 23 ...
Page 572: ...534 Fabric OS Administrator s Guide 53 1002446 01 Hexadecimal overview D ...
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