Traffic Control

The following scenario shows how to configure a basic traffic control discipline, which can be used for traffic shaping and scheduling purposes on OSDx. The monitor test performance operational command can be used to calculate the throughput.

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Test Traffic Control

Description

In this scenario, a fair queuing controlled delay qdisc (fq-codel) is configured in DUT0.

Scenario

Step 1: Set the following configuration in DUT0:

set interfaces ethernet eth0 address 10.0.0.2/24
set interfaces ethernet eth0 traffic control out QDISC
set traffic control QDISC type fq-codel

Step 2: Set the following configuration in DUT1:

set interfaces ethernet eth0 address 10.0.0.1/24

Step 3: Ping IP address 10.0.0.1 from DUT0:

admin@DUT0$ ping 10.0.0.1 count 1 size 56 timeout 1
Show output
PING 10.0.0.1 (10.0.0.1) 56(84) bytes of data.
64 bytes from 10.0.0.1: icmp_seq=1 ttl=64 time=0.859 ms

--- 10.0.0.1 ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 0.859/0.859/0.859/0.000 ms

Step 4: Initiate a bandwidth test from DUT0 to DUT1

admin@DUT1$ monitor test performance server port 8080
admin@DUT0$ monitor test performance client 10.0.0.1 duration 5 port 8080
Expect this output in DUT0:
Connecting to host 10.0.0.1, port 8080
[  5] local 10.0.0.2 port 40780 connected to 10.0.0.1 port 8080
[ ID] Interval           Transfer     Bitrate         Retr  Cwnd
[  5]   0.00-1.00   sec  54.9 MBytes   459 Mbits/sec    0   1.35 MBytes
[  5]   1.00-2.01   sec   136 MBytes  1.14 Gbits/sec    0   3.01 MBytes
[  5]   2.01-3.01   sec   146 MBytes  1.23 Gbits/sec    0   3.01 MBytes
[  5]   3.01-4.01   sec   148 MBytes  1.24 Gbits/sec    0   3.01 MBytes
[  5]   4.01-5.01   sec   151 MBytes  1.27 Gbits/sec    0   3.01 MBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-5.01   sec   636 MBytes  1.07 Gbits/sec    0             sender
[  5]   0.00-5.01   sec   636 MBytes  1.06 Gbits/sec                  receiver

iperf Done.

Step 5: Run command traffic control show at DUT0 and check if output contains the following tokens:

fq_codel
Show output
Traffic control for interface 'eth0' - 'egress' mode

---------------------------------------------------------------------------
ID   traffic control    type    parent  bytes sent  pkts sent  pkts dropped
---------------------------------------------------------------------------
1:0  QDISC            fq_codel  root     697562304     461733             0