Chelsio Communications Chelsio T4 Guia do Utilizador descarregar pdf (Página 210)

XVI. Traffic Management

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

mode class rate-unit bits rate-mode absolute 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 (0-7)

 Y 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 <ethX> sched-class params type packet level ch-rl

mode class rate-unit <scheduler-rate-unit> rate-mode <scheduler-rate-mode>

channel <Channel No.> class 0 max-rate <maximum-rate> pkt-size <Packet

size>

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.

 Packet size is the TCP mss size in bytes; for example  for an MTU of 1500, use a packet

size of 1460.

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Chelsio Communications Chelsio T4 Guia do Utilizador Página 210