sis(4) flow control
longwitz at incore.de
Sat Jul 13 20:30:49 UTC 2013
Yonghyeon PYUN wrote:
>>> Try attached patch and let me know how it works.
>> Thanks for your patch. I will test it on next update of my soekris boxes
>> with sis interfaces. Because they are all remote far away this will need
>> some time.
> Ok. Make sure to check established link before testing
> flow-control. 'ifconfig sis0' will show current media and you
> should have something like the following.
> media: Ethernet autoselect <flowcontrol> (100baseTX <full-duplex,flowcontrol,rxpause,txpause>)
> If you don't see 'rxpause', re-negotiate flow-control with
> 'ifconfig sis0 mediaopt flow'.
Because sis(4) (soekris 4801) is not available for me at the moment, I
tried with vr(4) (soekris 5501). In production I run both types of boxes
with FreeBSD 6 and a simple SETBIT patch to honor RX pause frames.
Now I want to go with FreeBSD 8 Stable and eliminate my patch.
"ifconfig vr0" gives
media: Ethernet autoselect (100baseTX <full-duplex>),
therefore I tried (using serial console) "ifconfig vr0 flow"
and now "ifconfig vr0" as expected gives
media: Ethernet autoselect <flowcontrol> (100baseTX
but the interface vr0 hangs. Outgoing packets are ok, but all incoming
packets are blocked. In this situation I can give "ifconfig vr0
-mediaopt flowcontrol" and see after "ifconfig vr0"
media: Ethernet autoselect (none)
status: no carrier
and one second later
media: Ethernet autoselect (100baseTX <full-duplex>)
and interface works correct again.
vr0: <VIA VT6105M Rhine III 10/100BaseTX> port 0xe100-0xe1ff mem
0xa0004000-0xa00040ff irq 11 at device 6.0 on pci0
vr0: Quirks: 0x2
vr0: Revision: 0x96
miibus0: <MII bus> on vr0
ukphy0: <Generic IEEE 802.3u media interface> PHY 1 on miibus0
ukphy0: none, 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto,
vr0: Ethernet address: 00:00:24:cb:1e:34
My switch is D-Link DGS-1008D green Ethernet (has support for IEEE
802.3x Flow-Control). On the same switch I have connected two other
machines using msk driver (88E8050 and 88E8055) and "ifconfig msk0"
media: Ethernet autoselect (1000baseT
Maybe there is a bug in vr(4) that generates the hang, but why is
negotiation of flowcontrol on vr(4) not done at boot time as shown for
If you need more information about the hang let me know.
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