Chelsio Communications Chelsio T5 Guia do Utilizador descarregar pdf (Página 258)

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XIX. Traffic Management

Chelsio T5/T4 Unified Wire For Linux Page 258

4.1.2. Class Weighted Round Robin

Incoming traffic flows from various applications can be prioritized and provisioned using a

weighted round-robin scheduling algorithm.

Class weighted round robin can be configured using the following command:

[root@host]# cxgbtool <ethX> sched-class params type packet level cl-wrr

channel <Channel No.> class <scheduler-class-index> weight <Y>

Here,

 ethX is the Chelsio interface

 Channel No. is the port on which data is flowing (0-3).

 scheduler-class-index is the TCP traffic class (0-14 for T4 series of adapters and 0-15 for T5

series of adapters).

 weight is the weight to be used for a weighted-round-robin scheduling hierarchy. Possible

values include 1 to 99.

4.1.3. Channel Rate Limiting

This scheduler hierarchy level can be used to rate limit individual channels.

Channel rate limiting can be configured using the following command:

[root@host]# cxgbtool eth6 sched-class params type packet level ch-rl rate-

unit <scheduler-rate-unit> rate-mode <scheduler-rate-mode> channel 1 max-

rate <maximum-rate>

Here,

 ethX is the Chelsio interface

 scheduler-rate-unit specifies whether the traffic management rule is configured for bit-rate or

packet rate . Possible values include bits or pkts

 scheduler-rate-mode specifies whether the traffic management rule is configured to support

a percent of the channel rate or an effective rate. Possible values include relative or

absolute.

 Channel No. is the port on which data is flowing (0-3).

 maximum-rate is the bit rate (Kbps) for this TCP stream. The lower limit is 300 Mbps and

600 Mbps for T4 and T5 adapters respectively.

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