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[Samsonite]

Hardware version is A3
Firmware is 1.37na (updated last night)
QOS is off
WISH is off
SPI is off (have tried with both)
UDP/TCP is set to endpoint independant
WAN port speed 1000mbps (have also tried "auto")
Multicast streams is off (have tried with it on)
UPNP is off (have tried with it on)

We are on a 1GB/30mb fiber to the home connection, with no modem between the fiber and the DIR-655. The DIR-655 has 4 different clients connected to the 4 LAN ports. Each client is confirmed 1GB. Transferring between clients over LAN caps out at 22-24mBytes/second. Speedtest caps at 220-225mbps/sec (tested on Win7 Pro and several linux hosts).

When I plug directly into the fiber, I can run the same speedtest and get 941mbps reliably.

Any suggestions?

My theory, based on absolutely nothing, is that the DIR655 is somehow giving each port 25% of the throughput?? Makes no sense, but I can't figure out why on earth its randomly chosen 220mbps to be the rate it sits at.

[Samsonite]

Hardware version is A3
Firmware is 1.37na (updated last night)
QOS is off
WISH is off
SPI is off (have tried with both)
UDP/TCP is set to endpoint independant
WAN port speed 1000mbps (have also tried "auto")
Multicast streams is off (have tried with it on)
UPNP is off (have tried with it on)

We are on a 1GB/30mb fiber to the home connection, with no modem between the fiber and the DIR-655. The DIR-655 has 4 different clients connected to the 4 LAN ports. Each client is confirmed 1GB. Transferring between clients over LAN caps out at 22-24mBytes/second. Speedtest caps at 220-225mbps/sec (tested on Win7 Pro and several linux hosts).

When I plug directly into the fiber, I can run the same speedtest and get 941mbps reliably.

Any suggestions?

My theory, based on absolutely nothing, is that the DIR655 is somehow giving each port 25% of the throughput?? Makes no sense, but I can't figure out why on earth its randomly chosen 220mbps to be the rate it sits at.

Could it be limited by the wireless? 220ish is ~300n speeds..

[FurryNutz]

Link>Welcome!

• What region are you located?
• Has a Factory Reset been performed?
• Was a Factory Reset performed before and after any firmware updates then set up from scratch?

  Link> >FW Update Process

Internet Service Provider and Modem Configurations

• What ISP Service do you have? Cable or DSL?
• What ISP Modem Mfr. and model # do you have?

Router and Wired Configurations
Some things to try: - Log into the routers web page at 192.168.0.1. Use IE, Opera or FF to manage the router. Besure to log into the Admin account on the router.

• Turn off ALL QoS or Disable Traffic Shaping (DIR only) GameFuel (DGL only and if ON.) options, Advanced/QoS.
• Turn off Advanced DNS Services if you have this option under Setup/Internet/Manual or under Setup/PARENTAL CONTROL/Set to>None: Static IP or Obtain Automatically From ISP.
• Enable or Disable Use Unicasting (compatibility for some ISP DHCP Servers) and test under Setup/Internet/Manual. Disable may help with speed performance on higher speed ISP services.
• Turn off DNS Relay under Setup/Networking. Link>Finding Faster DNS Addresses using Name Bench and input new DNS addresses under Setup/Internet/Manual.
• Setup DHCP reserved IP addresses for all devices ON the router. Setup/Networking. This ensures each devices gets its own IP address when turned on and connected, eliminates IP address conflicts and helps in troubleshooting and maintain consistency for applications that need to connect as well as mapped drives.
• Ensure devices are set to auto obtain an IP address.
• If IPv6 is an option on the router, select Local Connection Only under Setup/IPv6.
• Set Firewall settings to Endpoint Independent for TCP and UDP under Advanced/Firewall. Enable or Disable SPI to test.

FYI> >WAN and LAN Connection Rates and ISP Speeds FAQ
Over all the Rev A model of the DIR-655 is about 10 years old and based on older networking speeds and may have not been initially designed to have throughput speeds much beyond 200-300Mb since ISPs were not supporting 1000mb speeds back then.

Wifi will not achieve any data rates matching your isp speeds. WiFi is based on Connection Rates first between the router and devices. 300Mb. Actual data xfer rates differ and are not the same and not to be confused. The most I've seen on a 655 series is about 10Mb actual data xfer rate, maybe a bit higher depending on how good the system is set up.

[Samsonite]

I appreciate the response, however all of your suggestions are answered in the original post..

[FurryNutz]

You can try using the 655 as a wired AP would be about it. I recommend since your on a 1Gb ISP system, you use there router HW to handle your router needs.
http://www.smallnetbuilder.com/wireless/wireless-reviews/30726-d-link-dir-655-a4-quick-review

[Samsonite]

Are you saying that the DIR655 won't actually do 1GB LAN connections? Is this a known limitation? Did it ever do 1GB LAN -> LAN?

[FurryNutz]

LAN to LAN is the Connection RATE 1000Mb and is supported between the router and LAN connected devices if they support the 1000Mb connection rate.  Not to be confused with throughput.

[Samsonite]

OK.
I have independently confirmed (using a gigabit switch) that the hosts can transfer LAN to LAN (to each other) at/near gigabit speeds.

But when they are plugged into the DIR-655 LAN to LAN is capped at 220-224 mbps (22-24MB/sec)

Is there a way to fix this?

[FurryNutz]

I don't think so. I recommend using it as a wired AP since your network and ISP speeds are beyond what the Rev A supports.

[Samsonite]

Sorry, just to be clear.

This is a known limitation? That the device I purchased that advertised 1GB LAN connections is unable to achieve those speeds?

Or is there some configuration I am doing that is causing this limitation.

[FurryNutz]

What is the connection rate you see in windows when you connect it to the back of the 655? Open network properties then select Status. It will show you the connection rate it detects on the NIC and the router. You should see 1Gb there. That is a connection rate, not throughput.

[Samsonite]

Yes, on all hosts it shows 1GB.

[FurryNutz]

It would seem to be limited on the throughput on the Rev A. I'm not sure if Rev B or C would have any more performance gain. They may.
What ISP Mfr and model modem/ONT do you have?