Addendum
You can use the service-policy input policy-name layer 2 command in Interface Configuration mode to
apply an input policy map to Layer 3 physical interfaces.
To apply a Layer 2 policy on Layer 3 interfaces, perform the following:
1. Configure an interface with an IP address or a VLAN subinterface
CONFIGURATION mode
Dell(conf)# int fo 0/0
INTERFACE mode
Dell(conf-if-fo-0/0)# ip address 90.1.1.1/16
2. Configure Layer2 policy with Layer 2 (Dot1p or source MAC-based) classification rules.
CONFIGURATION mode
Dell(conf)# policy-map-input l2p layer2
3. Apply the L2 policy on the Layer 3 interface.
INTERFACE mode
Dell(conf-if-fo-0/0)# service-policy input l2p layer2
Managing Hardware Buffer Statistics
Bufffer statistics tracking utility is supported on the S6000 platform.
The memory management unit (MMU) on S6000 and Z9000 platforms is 12.2 MB in size. It contains
approximately 60,000 cells, each of which is 208 bytes in size. MMU also has another portion of 3 MB
allocated to it. The entire MMU space is shared across a maximum of 104 logical ports to support egress
admission-control mechanisms to implement scheduling and shaping on per-port and per-queue levels.
Also, the MMU buffer cells can be used by each port or queue either as a static partition or as a dynamic
partition. With dynamic mode, you can specify the percentage of available buffer that is utilized by a
queue. This dynamic partition or block is set to be two-thirds of the available buffers for all unicast
queues and one-fifth of the available buffers for all multicast queues on these platforms.
The maximum number of ports, including fan-out, supported is 64 and the maximum number of queues
supported is 15. Analyzing and evaluating buffer statistics is a mechanism that enables monitoring of
resources and tuning of allocation of buffers. This mechanism operates in two modes, namely, Max Use
count mode and Current Use count mode. Max Use count mode provides the maximum values of
counters accumulated over a period of time. Current Use count mode enables you to obtain a snapshot
of the counters at a particular point in me using a triggering utility. The trigger can either be software-
based or based on a predetermined threshold event. Software-based triggers are supported, which are
the values derived from the show command output in the Max use count mode. In Dell Networking OS
Release 9.3.0.0, only the max use count mode of operation is supported for computation of maximum
counter values.
Depending on the buffer space statistical values that you can obtain, you can modify the settings for
buffer area to achieve enhanced reliability and efficiency in the handling of packets. This evaluation and
administration of buffer statistics is useful and important in deployments that experience congestion
frequently. The receive buffer must be large enough to save all data that is received when the system
processes a PFC PAUSE frame.
You can use the service-class buffer shared-threshold-weight queue0 ... queue7
number command in Interface Configuration mode to specify the threshold weight for the shared buffer
for each of the queues per port.
1. Create a 10-Gigabit Ethernet interface.
Dell(conf)#interface TenGigabitEthernet 0/8
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Quality of Service (QoS)