RT-AC86U Port forwarded traffic max throughput ~ 250Mbps

[zoon]

Hi

My AC86U is connected to a fiber 1Gbps line and I’m getting ~960 Mbps down/up using fast, speedtest and the like.

But any traffic routed through a forwarded port to my NAS maxes out at around 250Mbps.

I know my provider is not throttling any kind of traffic so it must be some kind of limitation on the router.

Is this expected behavior on this router?
Any way to raise this limit?

Thanks

 

[ApexRon]

Hi

My AC86U is connected to a fiber 1Gbps line and I’m getting ~960 Mbps down/up using fast, speedtest and the like.

But any traffic routed through a forwarded port to my NAS maxes out at around 250Mbps.

I know my provider is not throttling any kind of traffic so it must be some kind of limitation on the router.

Is this expected behavior on this router?
Any way to raise this limit?

Thanks

Can we assume that port forwarding on a another/previous router was at a rate near WAN speed? If this is the first attempt:

1. What type of device/software is the port being forwarded to?
2. How are you measuring throughput?

 

[zoon]

The previous router RT-AC87U was even slightly slower.

Topology looks as follows: Fiber -> Mediaconverter -> RT-AC86U -> Synology DS415+ direct attached to the router.

It only affects traffic coming from WAN to the Synology NAS using various forwarded ports.
Mostly WebDAV transfers or Apps from Synology (not sure what protocol they use) and a few torrents.

I monitor throughput on the router and the NAS.

On the LAN side of things I easily hit the hardlimit of 1Gbit Base-T.

 

[ApexRon]

The previous router RT-AC87U was even slightly slower.

Topology looks as follows: Fiber -> Mediaconverter -> RT-AC86U -> Synology DS415+ direct attached to the router.

It only affects traffic coming from WAN to the Synology NAS using various forwarded ports.
Mostly WebDAV transfers or Apps from Synology (not sure what protocol they use) and a few torrents.

I monitor throughput on the router and the NAS.

On the LAN side of things I easily hit the hardlimit of 1Gbit Base-T.

When you state that the NAS is directly attached to router I am assuming by Ethernet. Advise if my assumption is wrong.

So somewhere out in the internet you are either trying to backup or retrieve files from the NAS. Can I also assume that those internet devices have a comparable speed connection to the internet? If this is correct, then there are many more possibilities than just port forwarding. One possibility could be the ISP at the remote location throttling the traffic. Then there is window sizing, segmentation, routing, and on and on.

From a PC on your local LAN, measure the download speed of a large file from somewhere in the internet say Microsoft or any server that you feel confident has a high speed internet connection. You may want to try more than one server. My experience has been that the throughput of file transfers has been significantly less than the speed of my internet connection.