Networking Question Regarding Gigbit Ethernet

Sun Jul 1 15:01:59 MST 2012

There is no network speed setting in the device to limit it to 100baseT.

The cable came with the device, and I have tried other cables and ports -
no difference.

top on the device shows a perl process eating up about 93% of the cpu every
now and then. I can't seem to capture it -
top - 14:54:16 up  2:47,  2 users,  load average: 1.05, 1.11, 1.09
Tasks:  93 total,   1 running,  92 sleeping,   0 stopped,   0 zombie
Cpu(s):  0.3%us,  0.7%sy,  0.3%ni, 98.7%id,  0.0%wa,  0.0%hi,  0.0%si,
0.0%st
Mem:    253632k total,   232896k used,    20736k free,    29184k buffers
Swap:   500608k total,    30016k used,   470592k free,    71808k cached

There is a firmware update avaialable, so I will run that and see if
anything improves. If not, then back to costco it goes!

Mark

On Sun, Jul 1, 2012 at 2:44 PM, Mike Bydalek <mike.bydalek at gmail.com> wrote:

> Like I said, I've seen auto-negotiation sometimes go wonky, even in the
> cases where ethtool reports correctly. If everything in your network is
> okay except this device, hard code it to 100/full through the web UI.
>
> I would say its your switch, but you tried different ports. How about the
> cable? Swap with a known good one.  Process of elimination here.
>
> Regards,
> Mike
>
> On Jul 1, 2012, at 2:39 PM, Mark Phillips <mark at phillipsmarketing.biz>
> wrote:
>
> I was able to ssh into the MBL and it has ethtool installed -
>
> MyBookLive:~# ethtool eth0
> Settings for eth0:
>     Supported ports: [ MII ]
>     Supported link modes:   10baseT/Full
>                             100baseT/Full
>                             1000baseT/Full
>     Supports auto-negotiation: Yes
>     Advertised link modes:  10baseT/Full
>                             100baseT/Full
>                             1000baseT/Full
>     Advertised auto-negotiation: Yes
>     Speed: 100Mb/s
>     Duplex: Full
>     Port: MII
>     PHYAD: 1
>     Transceiver: external
>     Auto-negotiation: on
>     Link detected: yes
> MyBookLive:~#
>
> So, it should work on 100baeT. Any thoughts on why I am loosing so many
> packets?
>
> Mark
>
> On Sun, Jul 1, 2012 at 2:09 PM, Mark Phillips <mark at phillipsmarketing.biz>wrote:
>
>> So I need to run this on the MLB?
>>
>> Mark
>> On Jul 1, 2012 1:36 PM, "James Mcphee" <jmcphe at gmail.com> wrote:
>>
>>> As such.  You need to use whatever eth device you have, of course.
>>>
>>> jmcphee at locus ~ :) $ sudo ethtool eth2
>>> Settings for eth2:
>>>         Supported ports: [ TP MII ]
>>>         Supported link modes:   10baseT/Half 10baseT/Full
>>>                                 100baseT/Half 100baseT/Full
>>>                                 1000baseT/Half 1000baseT/Full
>>>         Supported pause frame use: No
>>>         Supports auto-negotiation: Yes
>>>         Advertised link modes:  10baseT/Half 10baseT/Full
>>>                                 100baseT/Half 100baseT/Full
>>>                                 1000baseT/Half 1000baseT/Full
>>>         Advertised pause frame use: Symmetric Receive-only
>>>         Advertised auto-negotiation: Yes
>>>         Link partner advertised link modes:  10baseT/Half 10baseT/Full
>>>                                              100baseT/Half 100baseT/Full
>>>         Link partner advertised pause frame use: Symmetric
>>>         Link partner advertised auto-negotiation: Yes
>>>         Speed: 100Mb/s
>>>         Duplex: Full
>>>         Port: MII
>>>         PHYAD: 0
>>>         Transceiver: internal
>>>         Auto-negotiation: on
>>>         Supports Wake-on: pumbg
>>>         Wake-on: g
>>>         Current message level: 0x00000033 (51)
>>>                                drv probe ifdown ifup
>>>         Link detected: yes
>>>
>>>
>>> On Sun, Jul 1, 2012 at 1:22 PM, Mark Phillips <
>>> mark at phillipsmarketing.biz> wrote:
>>>
>>>> How do I use ethtool to answer your question?
>>>>
>>>> Mark
>>>>
>>>>
>>>> On Sun, Jul 1, 2012 at 12:52 PM, James Mcphee <jmcphe at gmail.com> wrote:
>>>>
>>>>> What does ethtool tell you about what the interface thinks it is?
>>>>>
>>>>> On Sun, Jul 1, 2012 at 12:44 PM, Mark Phillips <
>>>>> mark at phillipsmarketing.biz> wrote:
>>>>>
>>>>>> I have a 100baseT network with several Debian servers, a mac book,
>>>>>> and some virtual windows. I just picked up a Western Digital My Book Live
>>>>>> (MBL) 2TB NAS at Costco, and powered it up on my network. The unit is just
>>>>>> sitting with its green light on, and the web interface is really slow. When
>>>>>> I ping the device, it shows somewhere from 50% to 86% packet loss. If I
>>>>>> ping any other computer on the network I have 0% packet loss. I have tried
>>>>>> moving the device to different physical plugs, and I get the same results.
>>>>>>
>>>>>> ping results for the MBL from server A:
>>>>>> --- 192.168.25.213 ping statistics ---
>>>>>> 330 packets transmitted, 152 received, 53% packet loss, time 329555ms
>>>>>> rtt min/avg/max/mdev = 0.208/0.273/0.650/0.048 ms
>>>>>>
>>>>>> --- 192.168.25.213 ping statistics from server B ---
>>>>>> 254 packets transmitted, 120 received, 52% packet loss, time 252998ms
>>>>>> rtt min/avg/max/mdev = 0.196/0.264/2.499/0.206 ms
>>>>>>
>>>>>>
>>>>>> ping results for  server A to B:
>>>>>> --- 192.168.25.130 ping statistics ---
>>>>>> 340 packets transmitted, 340 received, 0% packet loss, time 338996ms
>>>>>> rtt min/avg/max/mdev = 0.080/0.177/0.246/0.030 ms
>>>>>>
>>>>>> The device says gigabit Ethernet next to the Ethernet port. Is there
>>>>>> any reason I can't connect a gigabit Ethernet device to a 100baseT network
>>>>>> other than the obvious speed difference? Should I see all this packet loss?
>>>>>> This is actually the second unit I have tried - the first one acted the
>>>>>> same way, so I took it back. I am now wondering if I am doing something
>>>>>> wrong.
>>>>>>
>>>>>>
>>>>>> Thanks!
>>>>>>
>>>>>> Mark
>>>>>>
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>>>>>
>>>>>
>>>>>
>>>>> --
>>>>> James McPhee
>>>>> jmcphe at gmail.com
>>>>>
>>>>> ---------------------------------------------------
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>>>>>
>>>>
>>>>
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>>>
>>>
>>>
>>> --
>>> James McPhee
>>> jmcphe at gmail.com
>>>
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>>
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