Re: Networking Question Regarding Gigbit Ethernet

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Author: Michael Butash
Date:  
To: Mark Phillips
CC: Main PLUG discussion list
Subject: Re: Networking Question Regarding Gigbit Ethernet
Out of the last several external WD drives I've gotten for myself and
others, most have failed prematurely, caused very buggy hardware issues
(bios wouldn't even load with their usb drive connected), and prior
mentioned removal of firmware features to allow drives to be raid
friendly. I showed my support by not buying them for a good 3-4 years
now.

Seagate raced to last with the maxtor purchase, wd just borg'd hitachi's
drive business, leaving Samsung as about the only other viable hd
company. Competition is obviously alive and well in this business with
the product quality showing as a result.

Probably better off sniping a used little drobo unit off ebay on the
cheap and byod than messing with vendor nas junk if they can't even ship
a stable os on the unit.

-mb


On 07/01/2012 04:18 PM, Mark Phillips wrote:
> Well, the update finished, but I am still getting over 50% packet loss
> when I ping the device. I guess back to costco it goes.
>
> Mark
>
> On Sun, Jul 1, 2012 at 3:05 PM, Mark Phillips
> < <mailto:mark@phillipsmarketing.biz>> wrote:
>
>     The device is now updating the firmware......and there are no
>     packets lost on pings to the device or pings from the device.

>
>     Mark

>
>
>     On Sun, Jul 1, 2012 at 2:53 PM, Michael Butash <
>     <mailto:michael@butash.net>> wrote:

>
>         Unless you have a managed switch, don't force negotiation, as
>         it'll just cause the switch to run in 10base/half-duplex (lowest
>         common denominator) when there is no negotiation advertised.
>           It's sitting in 100/full already, which is what you want.

>
>         If you do ifconfig eth0, do you see any errors?  Collisions and
>         CRC errors will stack if there is a negotiation problem.  Seems
>         like either the switch or phy port on the mybook is wack, but
>         doesn't make a lot of sense you'd lose that much anyways.  Try
>         different switch port/cable if there are errors.

>
>         Have you tried pinging from the mbl itself to the gateway or
>         other hosts?  Could be they have some kind of input iptables
>         filter rate-limiting/shaping packets or some such, but unlikely.

>
>         -mb

>
>
>
>         On 07/01/2012 02:39 PM, Mark Phillips 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
>             <
>             <mailto:mark@phillipsmarketing.biz>
>             <mailto:mark@__phillipsmarketing.biz
>             <mailto:mark@phillipsmarketing.biz>>> wrote:

>
>                  So I need to run this on the MLB?

>
>                  Mark

>
>                  On Jul 1, 2012 1:36 PM, "James Mcphee"
>             < <mailto:jmcphe@gmail.com>
>             <mailto:jmcphe@gmail.com <mailto:jmcphe@gmail.com>>> wrote:

>
>                      As such.  You need to use whatever eth device you
>             have, of course.

>
>                      jmcphee@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
>             <
>             <mailto:mark@phillipsmarketing.biz>
>             <mailto:mark@__phillipsmarketing.biz
>             <mailto:mark@phillipsmarketing.biz>>>

>
>                      wrote:

>
>                          How do I use ethtool to answer your question?

>
>                          Mark

>
>
>                          On Sun, Jul 1, 2012 at 12:52 PM, James Mcphee
>             < <mailto:jmcphe@gmail.com>
>             <mailto:jmcphe@gmail.com <mailto:jmcphe@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
>             < <mailto:mark@phillipsmarketing.biz>
>             <mailto:mark@__phillipsmarketing.biz
>             <mailto:mark@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
>              <mailto:jmcphe@gmail.com>
>             <mailto:jmcphe@gmail.com <mailto:jmcphe@gmail.com>>

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>                      --
>                      James McPhee
>              <mailto:jmcphe@gmail.com>
>             <mailto:jmcphe@gmail.com <mailto:jmcphe@gmail.com>>

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