0

I have:

  • One client with two 1000Mbps NICs, teamed using round-robin method
  • One master with a 10Gbps NIC

They are connected with a Huawei 10G switch (S5700).

Then I ran iperf -s on master and iperf -c MASTER.IP, it reports bandwidth of 215MB/s, as I expected.

But when I tried iperf -s on client and iperf -c CLIENT.IP on master, it reports bandwidth of only 120MB/s, seems like only one network interface is used.

Both machine is running CentOS 7 and here's my teaming configuration:

ifcfg-team0:

DEVICE="team0"
DEVICETYPE="Team"
ONBOOT="yes"
BOOTPROTO="none"
NETMASK=255.255.255.0
IPADDR=192.168.42.1
TEAM_CONFIG='{"runner": {"name": "roundrobin"}}'

ifcfg-enp2s0f0:

DEVICE="enp2s0f0"
DEVICETYPE="TeamPort"
ONBOOT="yes"
BOOTPROTO="none"
TEAM_MASTER="team0"

(and also ifcfg-enp2s0f1 which is almost identical to ifcfg-enp2s0f0)

Any ideas? Thanks a lot.

BlahGeek
  • 1

1 Answers1

0

From the perspective of the bonded system:

  • Transmit goes out two slaves
  • Receive comes in one slave

Even though it's TCP and is likely very out-of-order because of the round-robin bond, your transmit achieves about 1.8Gbps over two 1Gbps interfaces.

However, the switch does not have any configuration to load balance back into the system, so you are limited to the speed of one slave coming back the other way.

suprjami
  • 3,536
  • 21
  • 29