Silent data corruption on em(4) interfaces

[Sean Bruno]

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On 08/20/15 02:57, KOT MATPOCKuH wrote:
> Hello!
> 
> I got silent data corruption when transferring data via em(4)
> interface on 10.2-STABLE r286912. 1. I got broken large file
> transferred via ftp (MD5 checksum mismatched); 2. I got disconnects
> when transferring large data via ssh with messages: Corrupted MAC
> on input. Disconnecting: Packet corrupt
> 
> Problem occurs only after few hours of uptime. Immediately after
> reboot I transferred same file via ftp without any errors.
> 
> I tried to use: - em0 and em2 interfaces in link aggregation - em1
> as "clean" interface But I got same problem in both cases.
> 
> Also one time when transferring file I got this messages: em0:
> Interface stopped DISTRIBUTING, possible flapping em0: Watchdog
> timeout -- resetting em2: Interface stopped DISTRIBUTING, possible
> flapping em2: Watchdog timeout -- resetting
> 
> netstat -in does not see any problems: Name    Mtu Network
> Address              Ipkts Ierrs Idrop    Opkts Oerrs  Coll em0
> 1500 <Link#1>      00:14:4f:01:3f:7a  6689452     0     0 146720
> 0     0 em1    1500 <Link#2>      00:14:4f:01:3f:7b  5732168     0
> 0 2865912     0     0 em2    1500 <Link#3>      00:14:4f:01:3f:7c
> 501817     0     0 3392333     0     0
> 
> Network adapters is build in to the Sun Fire X4100 mother board: 
> em0 at pci0:1:1:0: class=0x020000 card=0x10118086 chip=0x10108086
> rev=0x03 hdr=0x00 vendor     = 'Intel Corporation' device     =
> '82546EB Gigabit Ethernet Controller (Copper)' class      =
> network subclass   = ethernet
> 
> TCP_OFFLOAD disabled in kernel's config.
> 
> Any ideas?
> 


Can you file a bugzilla report for this with all possible information
from your report?

sean
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