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S e n d d o c u m e n t a t i o n c o m m e n t s t o m d s f e e d b a c k - d o c @ c i s c o . c o m .
Configuring Fabric Congestion Control and QoS
Fibre Channel Congestion Control (FCC) is a Cisco proprietary flow control mechanism that alleviates
congestion on Fibre Channel networks.
Quality of service (QoS) offers the following advantages:
Provides relative bandwidth guarantee to application traffic.
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Controls latency experienced by application traffic.
Prioritizes one application over another (for example, prioritizing transactional traffic over bulk
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traffic) through bandwidth and latency differentiation.
This chapter provides details on the QoS and FCC features provided in all switches. It includes the
following sections:
FCC, page 47-2
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QoS, page 47-3
Control Traffic, page 47-4
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Data Traffic, page 47-5
Ingress Port Rate Limiting, page 47-13
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Default Settings, page 47-14
OL-6973-03, Cisco MDS SAN-OS Release 2.x
C H A P T E R
Cisco MDS 9000 Family Configuration Guide
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47-1
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