Bug#703040: No 1000baseT connection via crosslink with BCM95720 and tg3 module

[Frank Menzel <menzel@sipgate.de>]

Package: firmware-linux-nonfree
Version: 0.28+squeeze1

Two Dell PowerEdge R620 connected via crosslink using the onboard NICs 
(obviously a BCM5720 which is specifically produced for Dell and called 
BCM95720 then) don't negotiate to 1000baseT/Full, but only to 100baseT/Full.

Setting the speed to 1000baseT/Full using ethtool (ethtool -s eth2 speed 
1000 duplex full) on both sides causes the interfaces to flap and 
finally to run on 100baseT again:

> Mar 13 13:02:19 srv kernel: [ 4130.011167] tg3 0000:02:00.0: eth2: Link is down
> Mar 13 13:02:39 srv kernel: [ 4149.190067] tg3 0000:02:00.0: eth2: Link is up at 1000 Mbps, full duplex
> Mar 13 13:02:39 srv kernel: [ 4149.190069] tg3 0000:02:00.0: eth2: Flow control is on for TX and on for RX
> Mar 13 13:02:39 srv kernel: [ 4149.190071] tg3 0000:02:00.0: eth2: EEE is enabled
> Mar 13 13:02:40 srv kernel: [ 4150.672418] tg3 0000:02:00.0: eth2: Link is down
> Mar 13 13:02:59 srv kernel: [ 4170.041164] tg3 0000:02:00.0: eth2: Link is up at 1000 Mbps, full duplex
> Mar 13 13:02:59 srv kernel: [ 4170.041167] tg3 0000:02:00.0: eth2: Flow control is on for TX and on for RX
> Mar 13 13:02:59 srv kernel: [ 4170.041168] tg3 0000:02:00.0: eth2: EEE is enabled
> Mar 13 13:03:01 srv kernel: [ 4171.589320] tg3 0000:02:00.0: eth2: Link is down
> Mar 13 13:03:04 srv kernel: [ 4174.593785] tg3 0000:02:00.0: eth2: Link is up at 1000 Mbps, full duplex
> Mar 13 13:03:04 srv kernel: [ 4174.593787] tg3 0000:02:00.0: eth2: Flow control is on for TX and on for RX
> Mar 13 13:03:04 srv kernel: [ 4174.593789] tg3 0000:02:00.0: eth2: EEE is enabled
> Mar 13 13:03:06 srv kernel: [ 4176.133621] tg3 0000:02:00.0: eth2: Link is down
> Mar 13 13:03:08 srv kernel: [ 4178.890884] tg3 0000:02:00.0: eth2: Link is up at 1000 Mbps, full duplex
> Mar 13 13:03:08 srv kernel: [ 4178.890886] tg3 0000:02:00.0: eth2: Flow control is on for TX and on for RX
> Mar 13 13:03:08 srv kernel: [ 4178.890888] tg3 0000:02:00.0: eth2: EEE is enabled
> Mar 13 13:03:10 srv kernel: [ 4180.405676] tg3 0000:02:00.0: eth2: Link is down
> Mar 13 13:03:13 srv kernel: [ 4183.453298] tg3 0000:02:00.0: eth2: Link is up at 1000 Mbps, full duplex
> Mar 13 13:03:13 srv kernel: [ 4183.453301] tg3 0000:02:00.0: eth2: Flow control is on for TX and on for RX
> Mar 13 13:03:13 srv kernel: [ 4183.453302] tg3 0000:02:00.0: eth2: EEE is enabled
> Mar 13 13:03:14 srv kernel: [ 4184.991844] tg3 0000:02:00.0: eth2: Link is down
> Mar 13 13:03:21 srv kernel: [ 4191.373332] tg3 0000:02:00.0: eth2: Link is up at 100 Mbps, full duplex
> Mar 13 13:03:21 srv kernel: [ 4191.373335] tg3 0000:02:00.0: eth2: Flow control is on for TX and on for RX
> Mar 13 13:03:21 srv kernel: [ 4191.373336] tg3 0000:02:00.0: eth2: EEE is enabled


Kernel:
Linux srv.yourdomain.net 3.2.0-0.bpo.4-amd64 #1 SMP Debian 
3.2.35-2~bpo60+1 x86_64 GNU/Linux

libc:
libc6: 2.11.3-4

--
 Frank Menzel - menzel@sipgate.de
 Telefon: +49 (0)211-63 55 55-??
 Telefax: +49 (0)211-63 55 55-??

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