On Ruckus ICX 7450 stacking devices only, Priority 7 multicast traffic is not treated as Strict Priority. Multicast queues in the Ruckus ICX
7450 are limited, so Priority 6 and Priority 7 Multicast traffic is mapped to Multicast Queue 7. Therefore, even if you configure Priority 7 as
Strict Priority and Priority 6 as non-Strict, scheduling weight schsched_7_wt is applied on Multicast Queue 7 so that Priority 7
traffic is not scheduled as Strict. See
User-configurable scheduler profile configuration
on page 17 for more information on scheduling
weights.
QoS behaviors in a traditional stack
QoS profile restrictions
In a stacking topology, quality profiles for qosp7 cannot be configured. If an attempt is made to configure a profile for qosp7, the system
ignores the configuration.
NOTE
This applies only when the device is operating in stacking mode. It does not apply to standalone devices.
QoS behavior for trusting Layer 2 (802.1p)
By default, Layer 2 trust is enabled. Because priority 7 is reserved for stacking control packets, any ingress data traffic with priority 7 is
mapped to internal hardware queue 6. All other priorities are mapped to their corresponding queues.
QoS behavior for trusting Layer 3 (DSCP)
When the trust dscp mode is enabled, packets arriving with DSCP values 56 to 63 are mapped to internal hardware queue 6. All other
DSCP values are mapped to their corresponding internal hardware queues.
QoS behavior on port priority and VLAN priority
Port priority has a higher precedence than the 802.1p priority examination. If port priority is set to 7, all incoming traffic is mapped to internal
hardware queue 6.
When stacking is not enabled on a device, all priorities are mapped to their corresponding queues without restrictions.
QoS behavior for 802.1p marking
By default, 802.1p marking is not enabled in a traditional stack. Outgoing tagged traffic is not marked based on the hardware queue into
which ingress traffic was classified. 802.1p marking can be achieved using ACL. For configuration syntax, rules, and examples of QoS
marking, refer to the "QoS options for IP ACLs" section in the
Ruckus FastIron Security Configuration Guide
.
QoS queues
Ruckus devices support the eight QoS queues (qosp0 through qosp7).
The supported queues are:
TABLE 7 QoS queues
QoS priority level
QoS queue
0
qosp0 (lowest priority queue)
Quality of Service
QoS queues
Ruckus FastIron QoS and Traffic Management Configuration Guide, 08.0.70
16
Part Number: 53-1005294-01
