Ruckus Wireless Ruckus ICX 7150 Series, Руководство по настройке

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IPv6 QoS
QoS features supported for IPv6 environments include packet classification, queueing, traffic shaping, packet marking, and policing of IPv6
packets. These features are available for all FastIron products. The feature set is identical to that in IPv4.
To implement QoS in networks running IPv6, follow the same steps as those to implement QoS in networks running only IPv4. The
recommended steps are as follows:
• Identify applications in your network and understand the characteristics of the applications so that you can make decisions about
what QoS features to apply.
• Depending on network topology, link-layer header sizes are affected by changes and forwarding.
• Decide the method of classification, marking, and rate limiting. If the same network is carrying IPv4 and IPv6 traffic, decide if you
want to treat both the same or differently, and specify match criteria accordingly. If you want to treat them the same, use match
statements such as
match dscp
and
set dscp
. If you want to treat them differently, add match criteria such as
match protocol ip
and
match protocol ipv6
in the match criteria.
NOTE
The command syntax for IPv6 access control lists (ACLs) is different from the syntax for IPv4. See the “IPv6 ACLs” section in the
Ruckus FastIron Security Configuration Guide .
Flow control and buffer management
Using flow control and buffer management techniques, data packet transmission rates and buffer queue capacity can be managed to
provide the preferred quality of service (QoS).
Flow control manages the rate of data transmission between two devices to avoid overloading the receiving device with data. Using a
technique that allows the receiving device to control the data transmission speed, flow control can prevent data packets being dropped.
Buffer management controls whether the data packets are channeled to buffer queues before processing or allowed to pass through the
device. Packet buffer management uses priorities and lower priority data traffic is routed to buffers which have finite memory. If the device
buffers are full when a packet arrives, the packet may be dropped.
Priority flow control
The Ruckus implementation of the priority flow control (PFC) feature prevents frame loss from congestion by pausing traffic based on the
congested priority without affecting the traffic of uncongested priorities.
NOTE
The PFC feature is supported only on Ruckus ICX 7250, ICX 7450, and ICX 7750 devices. The ICX 7150 and ICX 7650 devices
do not support PFC.
Flow control enables feedback from a receiver to its sender to communicate buffer availability. The Ruckus implementation of IEEE
802.1Qbb PFC supports eight priorities and four priority groups (PGs) that can be subject to flow control independently. You can configure
PGs for priority flow control and ingress buffer management.
NOTE
PFC in a switch port extender (SPX) environment is only supported on stack units. It is not supported on a Ruckus ICX 7450
switch in an SPX environment.
PFC is disabled by default. It can be enabled by executing the
priority-flow-control enable command.
Quality of Service
Flow control and buffer management
Ruckus FastIron QoS and Traffic Management Configuration Guide, 08.0.70
Part Number: 53-1005294-01 25