X350-24t strange behavior with speed ports

[Alexandr_P]

Hello, all!

have X350-48t with connected lap-top.
When port speed is auto - all normal
When configure port as 100 duplex full - speed is very decrease

Try with SpeedTest, below results:
autonegotiate as 100 full - speedtest=95Mbps
configure as 100 full - speedtest=20-25Mbps

Does anybody has same problem?

Try with EXOS 15.3.4.6 patch 1-14 and EXOS 15.3.1.4 patch 1-47

Thank you!

[Alexandr_P]

When configure lap-top with 100Mbps full duplex - all work fine.
BUT
Trying Linksys SPS224G4 - in the same situation speed don't decrease, put back Extreme - speed is dercease.

Thank you!

[Jarek]

Hi Alexandr,

probably your laptop has a sync problem and his interface is synced as 100 half duplex.
Set laptop card to 100 full duplex and check again.

--
Jarek

[Erik_Auerswald]

Hello Alexandr,

did you re-configure the laptop to use 100/full duplex before changing the switch settings?

Your test results indicate that the laptop is configured to use auto-negotiation, which works fine. If you turn off auto-negotiation on the switch, but leave it enabled on the laptop, the laptop will use 100/half duplex, but the switch will use 100/full duplex. This results in transmission errors and thus degraded performance.

Br,
Erik