Policy For Fibre Channel Interfaces; Qos For Traffic Directed To The Cpu - Cisco nexus 5000 series Cli Configuration Manual
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Information About QoS
S e n d f e e d b a c k t o n x 5 0 0 0 - d o c f e e d b a c k @ c i s c o . c o m
Optimized multicast is supported on the BF and later versions of the Cisco Nexus 5020 switch. To verify
Note
the model version, enter the show module 1 command. The model version is the last two characters of
the model number. Optimized multicast is supported on all versions of the Cisco Nexus 5010 switch.
The system provides two predefined class maps for matching broadcast or multicast traffic. These class
maps are convenient for creating separate policy maps for unicast and multicast traffic. The predefined
class maps are as follows:
•
•
Note
Only one of these predefined classes can be configured in the system QoS policy.
Policy for Fibre Channel Interfaces
The egress queues are not configurable for native Fibre Channel interfaces. Two queues are available as
follows:
•
•
QoS for Traffic Directed to the CPU
The switch automatically applies QoS policies to traffic that is directed to the CPU to ensure that the
CPU is not flooded with packets. Control traffic, such as BPDU frames, is given higher priority to ensure
delivery.
Cisco Nexus 5000 Series Switch CLI Software Configuration Guide
1-6
class-all-flood
The class-all-flood class map matches all broadcast, multicast and unknown unicast traffic (across
all CoS values). If you configure a policy map with the class-all-flood class map, the system
automatically utilizes all available multicast queues for this traffic.
class-ip-multicast
The class-ip-multicast class map matches all IP multicast traffic. Policy options configured in this
class map apply to traffic across all Ethernet CoS values. For example, if you enable optimized
multicast for this class, the IP multicast traffic for all CoS values is optimized.
If you configure this class as a no-drop class, the priority flow control capability is applied across
all Ethernet CoS values. In this configuration, pause will be applied to unicast and multicast traffic.
A strict priority queue to serve high-priority control traffic.
A queue to serve all data traffic and low-priority control traffic.
Chapter 1
Configuring QoS
OL-16597-01
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