About Fcc - HP Cisco MDS 9216 - Fabric Switch Configuration Manual

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:
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This chapter provides details on the QoS and FCC features provided in all switches. It includes the
following sections:
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FCC
FCC reduces the congestion in the fabric without interfering with the standard Fibre Channel protocols.
This section contains the following topics:
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About FCC

The FCC protocol increases the granularity and the scale of congestion control applied to any class of
traffic (see
OL-16184-01, Cisco MDS SAN-OS Release 3.x
Provides relative bandwidth guarantee to application traffic.
Controls latency experienced by application traffic.
Prioritizes one application over another (for example, prioritizing transactional traffic over bulk
traffic) through bandwidth and latency differentiation.
FCC, page 66-1
QoS, page 66-3
Example Configuration, page 66-10
Ingress Port Rate Limiting, page 66-11
Default Settings, page 66-12
About FCC, page 66-1
FCC Process, page 66-2
Enabling FCC, page 66-2
Assigning FCC Priority, page 66-3
Figure 66-1).
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C H A P T E R
Cisco MDS 9000 Family CLI Configuration Guide
66-1