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Internet Speed Drops Drastically When Adding a Switch

We have fiber internet with 50Mbps up/down and we normally get between 40-50 depending on network load.

When I add an un-managed switch between our Sophos SG 310 and the Telco equipment, speed drops down to below 10Mbps up/down. I have tried 2 different switches and several patch cables wit the same result. Speeds return to normal when I plug the Telco connection back directly into the WAN port of the UTM.

We are adding the switch in preparation to adding a second SG 310 for HA.

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0 dirkkotte over 5 years ago

Often we see a duplex mismatch as source of this problem.

If speed is fixed at UTM or provider-router ... you have to select a fix speed at the other end of the cable too.
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0 Mark PCF over 5 years ago in reply to dirkkotte

I was hoping this was it singe the switch we put in was an unmanaged Gigabit and the UTM was set to 100Mbps/fullduplex.

Same problem remained when I replaced the Gigabit switch with a basic 10/100 though.
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0 dirkkotte over 5 years ago in reply to Mark PCF

i think your unmanaged switches need "auto" settings at all ports.
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0 dirkkotte over 5 years ago in reply to Mark PCF

i think your unmanaged switches need "auto" settings at all ports.
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