Changing link status in bge driver

[Pyun YongHyeon]

On Thu, Sep 23, 2010 at 11:05:08AM -0700, Sushanth Rai wrote:
> "ifconfig bge1 media none" does change the PHY status temporarily. I see the following when I run this command:
> 
> bge1: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
>       options=bb<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,VLAN_HWCSUM>
>         ether 00:40:d0:b8:1e:0b
>         media: Ethernet none
>         status: no carrier
> 
> After a few seconds if I do "ifconfig bge1", it's automagically changed to:
> 
> bge1: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
>       options=bb<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,VLAN_HWCSUM>
>         ether 00:40:d0:b8:1e:0b
>         media: Ethernet none (1000baseTX <full-duplex>)
>         status: active
> 
> 
> I tried playing around with mediaopt, but PHY status doesn't seem to change permanently. 
> 

brgphy(4) does not correctly handle IFM_NONE at this moment. In
fact, brgphy(4)'s manual media configuration does not seem to work
well. See MII_MEDIACHG handler of brgphy_physervice and implement
IFM_NONE media type to power down or isolate the PHY.

> 
> --- On Thu, 9/23/10, Luiz Otavio O Souza <lists.br at gmail.com> wrote:
> 
> > From: Luiz Otavio O Souza <lists.br at gmail.com>
> > Subject: Re: Changing link status in bge driver
> > To: "Sushanth Rai" <sushanth_rai at yahoo.com>
> > Date: Thursday, September 23, 2010, 2:31 AM
> > On Sep 23, 2010, at 4:11 AM, Sushanth
> > Rai wrote:
> > 
> > > Hello,
> > > 
> > > I'm using BCM5715C based NIC card on a FreeBSD 7.2
> > system. I would like to simulate condition where the PHY
> > layer is powered-off i.e, the link status should show as "no
> > carrier". When I do "ifconfig down", it just turns-off the
> > driver and the link status is still active. Is there is
> > anything I can do in the bge driver or anywhere else in the
> > software stack to simulate this condition without physically
> > disconnecting the cable ?
> > > 
> > > Thanks,
> > > Sushanth
> > 
> > Hi,
> > 
> > ifconfig bgeX media none should do what you need.
> > 
> > Luiz
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