Stock firmware: how to force WAN port to 100Mbs/full

[jcy]

Hi, we're getting a 100Mb link from cogent soon, but before I move this router, it needs the WAN port to be set to 100Mbs/full instead of auto. How can this be done?

 

[RMerlin]

Hi, we're getting a 100Mb link from cogent soon, but before I move this router, it needs the WAN port to be set to 100Mbs/full instead of auto. How can this be done?

You can't.

 

[jcy]

You can't.

Hi Merlin, if I were to install Merlin on it, would it then be possible?

 

[RMerlin]

Hi Merlin, if I were to install Merlin on it, would it then be possible?

Not through the webui. Might be possible to script it using robocfg, but I'm not sure if it can set the interface's rate, or if you'd need the low level documentation from Broadcom to know which register to manually write to.

Why do you need to fix the port rate?

 

[jcy]

Not through the webui. Might be possible to script it using robocfg, but I'm not sure if it can set the interface's rate, or if you'd need the low level documentation from Broadcom to know which register to manually write to.

Why do you need to fix the port rate?

for whatever reason, when using my laptop the bandwidth from the Cogent media converter will only do ~60Mbs/10Mbs up. When I called support, they told me to set the NIC to 100Mbs/full instead of auto and i was then able to get the full 100/100. The support guy indicated this will also be necessary on my router's WAN port

 

[ColinTaylor]

for whatever reason, when using my laptop the bandwidth from the Cogent media converter will only do ~60Mbs/10Mbs up. When I called support, they told me to set the NIC to 100Mbs/full instead of auto and i was then able to get the full 100/100. The support guy indicated this will also be necessary on my router's WAN port

That sounds like the generic response most support guys give users. That said, it's not uncommon for the NIC chipset from one manufacturer to not play nice with another manufacturer. It's quite likely you won't have a problem with the router so try it as-is. If you need to then try:

robocfg port 0 media 100FD

 

[jcy]

That sounds like the generic response most support guys give users. That said, it's not uncommon for the NIC chipset from one manufacturer to not play nice with another manufacturer. It's quite likely you won't have a problem with the router so try it as-is. If you need to then try:

robocfg port 0 media 100FD

Thanks for the command. I have always wanted to try Merlin but I'm an IT consultant, so I have to leave the router with stock firmware in case the guy after me is too dumb to manage it. I'm almost kind of half-hoping it won't work so I'll have an excuse to install it before they move offices.

 

[RMerlin]

Thanks for the command. I have always wanted to try Merlin but I'm an IT consultant, so I have to leave the router with stock firmware in case the guy after me is too dumb to manage it. I'm almost kind of half-hoping it won't work so I'll have an excuse to install it before they move offices.

At least any other IT guy shouldn't feel too lost with my firmware, as it retains the same interface as Asus's, with just a few additional options on it.

The rest is all under the hood.

I can't remember the last time I had to force an Ethernet interface port to a fixed rate, to be honest.

 

[jcy]

ok so yeah i'm going to have to install merlin unless that robocfg command can be run through stock firmware:

7/50 down/up testing with speedtest.net and speakeasy

http://www.speedtest.net/my-result/3491256659

http://imgur.com/8BYZAWx

 

[chadster766]

Another solution is to buy a cheap 10/100 switch and put it in between.

 

[RMerlin]

ok so yeah i'm going to have to install merlin unless that robocfg command can be run through stock firmware:

7/50 down/up testing with speedtest.net and speakeasy

http://www.speedtest.net/my-result/3491256659

http://imgur.com/8BYZAWx

You can use robocfg with the stock firmware, however the stock firmware has no user-created scripts that could take care of running this command at boot time. You would have to manually run it every time you rebooted the router.

 

[ColinTaylor]

ok so yeah i'm going to have to install merlin unless that robocfg command can be run through stock firmware:

7/50 down/up testing with speedtest.net and speakeasy

http://www.speedtest.net/my-result/3491256659

http://imgur.com/8BYZAWx

I assume that you confirmed that you could still get 100/100 with your laptop at the time of the test, therefore eliminating the possibility that you just happened to be testing whilst their network was congested.

 

[jcy]

@ColinTaylor Thanks again, running that command works. Also thanks to Merlin for informing me about the setting not surviving a reboot.

 

[sm00thpapa]

What router are we talking about in this thread?


Sent from my iPad using Tapatalk

 

[jcy]

What router are we talking about in this thread?

it's an RT-N66R, which I believe is exactly the same as the RT-N66U except that it's bought through retail channels like Best Buy

 

[Sagar]

My ISP also requires the WAN port of my RT-AC56S to be set to 100FD. tried with the "robocfg port 4 media 100FD", but nothing happens. Am I missing something?

 

[Sagar]

When I do a "robocfg showports", the ISP shows up on port 4 100HD. My ISP also requires the WAN port of my RT-AC56S to be set to 100FD. tried with the "robocfg port 4 media 100FD", but nothing happens. Am I missing something?

 

[ColinTaylor]

Replace the cable between the router and your ISP's device. Power off both devices, wait 60 seconds and turn them back on.

 

[Sagar]

Replace the cable between the router and your ISP's device. Power off both devices, wait 60 seconds and turn them back on.

But how do I change the wan link speed to 100FD so that it persists even on reboot ?

 

[RMerlin]

But how do I change the wan link speed to 100FD so that it persists even on reboot ?

Simplest solution IMHO is to put a cheap 100 Mbps switch between the router and the modem.