Connectivity Guide

NOTE: The supported speed varies for dierent platforms. After the reserved buers are used, each PFC starts consuming
shared buers from the lossless pool with the alpha value determining the threshold.
You can override the default priority group settings when you enable LLFC or PFC.
1 Create a network-qos type class-map to match the trac classes. For LLFC, match all the trac classes from 0 to 7. For PFC, match
the required trac class.
OS10(config)# class-map type network-qos tc
OS10 (config-cmap-nqos)# match qos-group 0-7
2 Create network-qos type policy-map to dene the actions for trac classes, such as a buer conguration and threshold.
OS10(config)# policy-map type network-qos buffer
OS10(config-pmap-network-qos)# class tc
OS10 (config-pmap-c-nqos)# pause buffer-size 300 pause-threshold 200 resume-threshold 100
OS10 (config-pmap-c-nqos)# queue-limit thresh-mode dynamic 5
Congure egress buer
All port queues are allocated with reserved buers. When the reserved buers are consumed, each queue starts using the shared buers
from the default pool.
The reserved buer per queue is 1664 bytes for the speed of 10G, 25G, 40G, 50G, and 100G. The default dynamic shared buer threshold
is 8.
1 Create a queuing type class-map to match the queue.
OS10(config)# class-map type queuing q1
OS10(config-cmap-queuing)# match queue 1
2 Create a queuing type policy-map to dene the actions for queues, such as a buer conguration and threshold.
OS10(config)# policy-map type queuing q-buffer
OS10(config-pmap-queuing)# class q1
OS10(config-pmap-c-que)# queue-limit queue-len 200 thresh-mode dynamic 5
Deep Buer mode
NOTE
: This feature is supported only on the S4200-ON series.
OS10 provides the exibility to congure the buer mode based on your system requirements. The system memory contains a list of packet
buers and per packet information (PPI), which is used to enable statistics tagging, ingress shaping, PFC, and output logical interface
stamping per multicast trac.
You can congure Deep Buer mode to manage switch buer availability. The following lists the total buer availability in dierent modes:
Table 67.
Buer availability in dierent modes
Platform Without deep buer With deep buer
S4200–ON series 4.63 GB 6.24 GB
Deep Buer mode takes eect only after saving it in the startup conguration and reloading the switch.
NOTE
: Disabling the Deep Buer mode conguration during run-time is not supported.
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