ETH-TRUNK LOAD-BALANCE S5720-LI

Hi!

I'm having a problem with an S5720-LI load-balance, it's just not functioning! I tryed every parameter but nothing changes!

Is there any bug with the software? It's version is V200R011C10SPC600

The scenario is shown below

router 192.168.0.1 is sending 600 Mbps to router 192.168.0.2, but is only passing about 320 Mbps

router 10.100.10.1 is sending 950 Mbps to router 10.100.10.2, but is only passing about 640 Mbps

the traffic is passing throught only one interface, as we can see in the output below.

<ERPS-02>di int br

PHY: Physical

*down: administratively down

#down: LBDT down

(l): loopback

(s): spoofing

(b): BFD down

(e): ETHOAM down

(dl): DLDP down

(lb): LBDT block

InUti/OutUti: input utility/output utility

Interface                   PHY   Protocol  InUti OutUti   inErrors  outErrors

Eth-Trunk101                up    up           0% 49.99%          0          0

  GigabitEthernet0/0/1      up    up           0% 99.99%          0          0

  GigabitEthernet0/0/3      up    up           0%     0%          0          0

The Eth Trunk configuration: (other switch is similar)

interface Eth-Trunk101

 description SW1<>SW2

 port link-type trunk

 undo port trunk allow-pass vlan 1

 port trunk allow-pass vlan 2000 3000

 stp disable

I appreciate any help! It's very important for us!