[SOLVED] Can't use 1000Mbps speed. Stuck at 100Mbps

[gobtron]

I decided to use a wired connection between my laptop and my RT-AC68P router (with Merlin firmware).

The result of ethtool command shows that 1000Mbps is possible with my ethernet adapter on my laptop.

prototron@ProtoMachine:~$ sudo ethtool eth0
Settings for eth0:
Supported ports: [ TP ]
Supported link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Supported pause frame use: Symmetric Receive-only
Supports auto-negotiation: Yes
Advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Advertised pause frame use: Symmetric
Advertised auto-negotiation: Yes
Speed: 100Mb/s
Duplex: Full
Port: Twisted Pair
PHYAD: 0
Transceiver: internal
Auto-negotiation: on
MDI-X: Unknown
Current message level: 0x000060e4 (24804)
link ifup rx_err tx_err hw wol
Link detected: yes


However, it is stuck at 100Mbps.

When I first plugged the wire, I was getting speed of about 6.5 MB/s. Then I rebooted the rooter and I was getting 11.5 MB/s.

I cleared the nvram and did a hard reset (pushing WPS button 10 seconds while powering on).

After that, ethtool was showing 1000 Mb/s speed. Yay!! So I tried to transfer a big file, but I still got 11.5 MB/s.

I checked again with ethtool, and it is now back to 100Mb/s speed


In the router web interface, under Tools -> Sysinfo, is it showing VLAN 1 and Link state "100 Full duplex" for LAN1.

So what should I do now? Is this problem related to the router or my computer's ethernet adapter? Both should be able to achieve 1000 Mb/s speed.

 

[hggomes]

Check your computer Ethernet Adapter name/model.

 

[gobtron]

Check your computer Ethernet Adapter name/model.

'dmidecode' reports the following information for the Ethernet adapter:

Onboard Device
Reference Designation: Hanksville Gbe Lan Connection
Type: Ethernet
Status: Enabled
Type Instance: 1
Bus Address: 0000:00:00.1



'lshw':

*-network
description: Ethernet interface
product: AR8161 Gigabit Ethernet
vendor: Qualcomm Atheros
physical id: 0
bus info: pci@0000:02:00.0
logical name: eth0
version: 10
serial: 28:d2:44:02:5c:63
size: 100Mbit/s
capacity: 1Gbit/s
width: 64 bits
clock: 33MHz
capabilities: pm pciexpress msi msix bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=alx duplex=full ip=192.168.1.101 latency=0 link=yes multicast=yes port=twisted pair speed=100Mbit/s
resources: irq:46 memory:c3300000-c333ffff ioport:2000(size=128)

 

[ColinTaylor]

Bad cable? Try another Cat5e/6 cable.

 

[L&LD]

Does your laptop negotiate a GbE connection with any other device? Do you have the latest driver? What os are you using?

 

[gobtron]

Does your laptop negotiate a GbE connection with any other device? Do you have the latest driver? What os are you using?

I am using a brand new 50' CAT6 cable.

Running Debian 8 (Jessie).

Latest driver? Hmm.. I have to check. Debian is know to be a little outdated sometimes

 

[L&LD]

I am using a brand new 50' CAT6 cable.

Running Debian 8 (Jessie).

Latest driver? Hmm.. I have to check. Debian is know to be a little outdated sometimes

Try using a known/good CAT5E or better cable then.

 

[gobtron]

I seem to have the latest driver.

Isn't CAT6 supposed to be "better" than CAT5 ?

 

[L&LD]

I seem to have the latest driver.

Isn't CAT6 supposed to be "better" than CAT5 ?

'Supposed to be' isn't intrinsically better than 'known/good'.

A cable is just as likely a suspect as any other part of the chain.

 

[hggomes]

Change your CAT5 cable to at least CAT5E. Are you using the cable that was inside AC68P box?

 

[gobtron]

I tested another cable, got 1000 Mb/s full duplex on router and computer. I switched back to the first cable I was using, still 1000 Mb/s full duplex on both side.

Then I realized that I am a complete idiot.

While testing the "known" cable, I realized that my USB drive isn't attached to my router anymore and is hooked to my Raspberry Pi, without 1GbE support...

I am ashamed a little. Lol

 

[hggomes]

LOL, not the first time seen don't worry, at least you found the reason why.

 

[TonyH]

'dmidecode' reports the following information for the Ethernet adapter:

Onboard Device
Reference Designation: Hanksville Gbe Lan Connection
Type: Ethernet
Status: Enabled
Type Instance: 1
Bus Address: 0000:00:00.1



'lshw':

*-network
description: Ethernet interface
product: AR8161 Gigabit Ethernet
vendor: Qualcomm Atheros
physical id: 0
bus info: pci@0000:02:00.0
logical name: eth0
version: 10
serial: 28:d2:44:02:5c:63
size: 100Mbit/s
capacity: 1Gbit/s
width: 64 bits
clock: 33MHz
capabilities: pm pciexpress msi msix bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=alx duplex=full ip=192.168.1.101 latency=0 link=yes multicast=yes port=twisted pair speed=100Mbit/s
resources: irq:46 memory:c3300000-c333ffff ioport:2000(size=128)

Check the NIC advanced set up.

 

[hggomes]

LOL 2.0, it was already solved.