HP Mellanox SX1018 Mellanox MLNX-OS® User Manualfor SX1018HP Ethernet - Page 77

Enhanced Transmission Selection ETS

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Rev 1.6.9 Step 4. Choose the desirable priority you want to enable using the command dcb priority-flow-control priority enable. switch (config) # dcb priority-flow-control priority 5 enable  To enable PFC per interface: Step 1. Log in as admin. Step 2. Change to config mode. Run: switch > enable switch # configure terminal Step 3. Enable PFC globally on the switch. Run: switch (config) # dcb priority-flow-control enable Step 4. Choose the desirable priority you want to enable using the command dcb priority-flow-control priority enable switch (config) # dcb priority-flow-control 5 enable Step 5. Change to Interface mode. Run: switch (config) # switch (config) # interface ethernet 1/1 switch (config interface ethernet 1/1) # Step 6. Enable PFC for the specific interface: switch (config interface ethernet 1/1) # dcb priority-flow-control mode on 5.8.2 Enhanced Transmission Selection (ETS) Enhanced Transmission Selection (ETS) provides a common management framework for assignment of bandwidth to traffic classes, for weighted round robin (WRR) scheduling. If a traffic class does not use all the bandwidth allocated to it, other traffic classes can use that available bandwidth. This allows optimal utilization of the network capacity while prioritizing and providing the necessary resources. The ETS feature has the following attributes: • ETS global admin: • Enable (default) - scheduling mode is WRR according to the configured bandwidth-pertraffic class • Disable - scheduling mode is Strict Priority (SP) • Bandwidth percentage for each traffic class: By default each traffic class gets an equal share The default mapping of priority to traffic classes (per interface) is as follows: • Priority 0,1 mapped to tc 0 • Priority 2,3 mapped to tc 1 • Priority 4,5 mapped to tc 2 • Priority 6,7 mapped to tc 3 ETS is enabled by default (scheduling is WRR).  To set the scheduling mode to Strict Priority: Mellanox Technologies 77 Mellanox Technologies Confidential

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Rev 1.6.9
Mellanox Technologies
77
Mellanox Technologies Confidential
Step 4.
Choose the desirable priority you want to enable using the command
dcb priority-flow-control
priority <pri[0..7]> enable
.
To enable PFC per interface:
Step 1.
Log in as admin.
Step 2.
Change to config mode. Run:
Step 3.
Enable PFC globally on the switch. Run:
Step 4.
Choose the desirable priority you want to enable using the command
dcb priority-flow-control
priority <pri[0..7]> enable
Step 5.
Change to Interface mode. Run:
Step 6.
Enable PFC for the specific interface:
5.8.2
Enhanced Transmission Selection (ETS)
Enhanced Transmission Selection (ETS) provides a common management framework for assign-
ment of bandwidth to traffic classes, for weighted round robin (WRR) scheduling. If a traffic
class does not use all the bandwidth allocated to it, other traffic classes can use that available
bandwidth. This allows optimal utilization of the network capacity while prioritizing and provid-
ing the necessary resources.
The ETS feature has the following attributes:
•
ETS global admin:
•
Enable (default) – scheduling mode is WRR according to the configured bandwidth-per-
traffic class
•
Disable – scheduling mode is Strict Priority (SP)
•
Bandwidth percentage for each traffic class: By default each traffic class gets an equal
share
The default mapping of priority to traffic classes (per interface) is as follows:
•
Priority 0,1 mapped to tc 0
•
Priority 2,3 mapped to tc 1
•
Priority 4,5 mapped to tc 2
•
Priority 6,7 mapped to tc 3
ETS is enabled by default (scheduling is WRR).
To set the scheduling mode to Strict Priority:
switch (config) # dcb priority-flow-control priority 5 enable
switch > enable
switch # configure terminal
switch (config) # dcb priority-flow-control enable
switch (config) # dcb priority-flow-control 5 enable
switch (config) #
switch (config) # interface ethernet 1/1
switch (config interface ethernet 1/1) #
switch (config interface ethernet 1/1) # dcb priority-flow-control mode on