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:
This chapter provides details on the QoS and FCC features provided in all switches. It includes the
FCC reduces the congestion in the fabric without interfering with the standard Fibre Channel protocols.
This section contains the following topics:
The FCC protocol increases the granularity and the scale of congestion control applied to any class of
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 56-1
QoS, page 56-3
Example Configuration, page 56-12
Ingress Port Rate Limiting, page 56-14
Default Settings, page 56-14
About FCC, page 56-1
FCC Process, page 56-2
Enabling FCC, page 56-2
Assigning FCC Priority, page 56-3
Displaying FCC Settings, page 56-3
C H A P T E R
Cisco MDS 9000 Family CLI Configuration Guide