Force Archer C7 v2 WAN to 100Mbps

[hansallis]

Recently discovered that the upstream router we're connecting too has its link speed set to 100baseT/full, but I can't get the WAN port on my router to match that. Auto negotiation sets it to 1000baseT/full and using ethtool doesn't have any effect.

After turning off autoneg, the output for 'ethtool eth0' is as follows:

Code: Select all

Settings for eth0:
        Supported ports: [ ]
        Supported link modes:   1000baseT/Full
        Supported pause frame use: No
        Supports auto-negotiation: No
        Advertised link modes:  Not reported
        Advertised pause frame use: No
        Advertised auto-negotiation: No
        Speed: 1000Mb/s
        Duplex: Full
        Port: MII
        PHYAD: 0
        Transceiver: external
        Auto-negotiation: off
        Current message level: 0x000000ff (255)
                               drv probe link timer ifdown ifup rx_err tx_err
        Link detected: yes

Especially the supported link modes are a bit strange. I don't think that info is correct and assume that 100baseT/full 100baseT/half etc. should also be possible for this hardware.

Any suggestions?

[hansallis]

Okay, the rabbit hole goes a bit deeper than I'd anticipated It seems the router itself only has one real network interface which is set to 1000baseT/full. That interface is connected to a switch which can be controlled with 'swconfig'.

'swconfig' also shows the contents of the ARP table and port 1 seems to be the actual WAN port, which is stuck at 100baseT/half while I need 100baseT/full.

So the question now seems to be: how to get swconfig to set one port to 100baseT/full.

To be continued

[hansallis]

Seems impossible at the moment unless I'd rebuild with the following patch included:
http://comments.gmane.org/gmane.comp.em ... evel/37378