Modem speed vs router speed issue

[Sergey Klyutsev]

Hello,
I have ASUS RT-AC88U router with Asuswrt-Merlin 384.15 .
I see big difference in speed if I connect straight to my cable modem or to my router. When I connect straight to the cable modem I have about 700 Mbps. But when I connect to the router I have 250-260 Mbps only. I connect via the same CAT7 ethernet cable. Why is this? Is this limitation of the router? Are there any settings that can fix that? Should I buy another router? I hope that RT-AC88U is not that outdated but why am I not getting speed? I'm kind of frustrated.

 

[ColinTaylor]

Log into the router and go to the Tools > System Information page. Check the status of Network > HW acceleration.

 

[Sergey Klyutsev]

Log into the router and go to the Tools > System Information page. Check the status of Network > HW acceleration.

It's disabled.

 

[ColinTaylor]

It's disabled.

That's why then. It's needs to be enabled to get higher throughput. It should tell you why it's disabled.

 

[Sergey Klyutsev]

That's why then. It's needs to be enabled to get higher throughput. It should tell you why it's disabled.

Could you please tip me where to toggle it? Can't find it.

 

[ColinTaylor]

Could you please tip me where to toggle it? Can't find it.

It depends on the reason it's disabled. That's why I asked you what it says the reason is.

 

[Sergey Klyutsev]

It depends on the reason it's disabled. That's why I asked you what it says the reason is.

It say's "Disabled (by user)". But I can't recall that I have touched it.

 

[ColinTaylor]

It say's "Disabled (by user)". But I can't recall that I have touched it.

OK. Check the setting at LAN - Switch Control called NAT Acceleration.

 

[Sergey Klyutsev]

OK. Check the setting at LAN - Switch Control called NAT Acceleration.

Thanks a lot!! I have switched NAT acceleration to Auto. Also enabled Jambo Frame. Now it says that HW acceleration is enabled and which is more important I have the same 700 Mbps via router too!! Hurray! Thank you very much!

 

[ColinTaylor]

That's good to hear. I would suggest that you leave Jumbo Frames off. Unless all your LAN devices are using Jumbo frames there's no benefit and it might actually cause unnecessary packet fragmentation.

 

[Sergey Klyutsev]

That's good to hear. I would suggest that you leave Jumbo Frames off. Unless all your LAN devices are using Jumbo frames there's no benefit and it might actually cause unnecessary packet fragmentation.

Thanks. Will switch it back.