[tech] Broken ethernet on pinball

tpg at ucc.asn.au tpg at ucc.asn.au
Mon Aug 26 20:30:26 AWST 2019


Fixed!

Thanks to Alistair for mentioning that it stopped after a reboot while 
an update was happening. Likely what happened was that it was in the 
middle of installing new network card firmware (the 8169 cards have a 
firmware blob) and soft bricked the card.

Connecting a USB ethernet adapter and running `apt reinstall 
linux-firmware` fixed it.

On 2019-08-22 19:32, Felix von Perger wrote:
> Hi all,
> 
> An unknown/undiagnosed thing happened to Pinball between 17:30 and 
> 18:30
> today, resulting in the onboard ethernet becoming inoperable.
> 
> Intriguingly, the link status lights on the port flashes as expected,
> and the OS recognises the link when the cable is connected. The cable
> and wall port worked fine when tested with my laptop. When plugged in,
> however, pinball fails to acquire an address by DHCP, ARP does not seem
> to work at all, and the switch port (kerosene, interface 
> GigabitEthernet
> 3/22) doesn't list any MAC addresses in its forwarding table:
> 
>> kerosene#show mac address-table interface Gi3/22
>> Multicast Entries
>>  vlan     mac address     type    ports
>> ---------+---------------+-------+--------------------------------------------
>>    3      ffff.ffff.ffff   system 
>> Gi2/1,Gi2/11,Gi2/13,Gi2/19,Gi2/32,Gi2/33
>> Gi2/48,Gi3/2,Gi3/4,Gi3/15,Gi3/17,Gi3/21
>> Gi3/22,Gi3/25,Gi3/29,Gi3/31,Gi3/33,Gi3/34
>>                                   Te1/1
>> 
> No suspicious kernel messages in pinball's /var/log/syslog, except for 
> a
> link-down message at 18:10. It's using the r8169 driver (which I've
> personally had issues with in the past, which I had worked around by
> using the r8168 driver instead). The ethernet hardware is listed as
> "Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit
> Ethernet Controller (rev 15)" by `lspci`.
> 
> I'm going to leave it powered off this evening and it might just work
> again tomorrow. If not, it would probably be worth investigating
> alternative drivers and/or ethernet cards.
> 
> Any thoughts?
> 
> Cheers,
> Felix [FVP]
> 
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