subrate SFP?

Jima nanog at
Sat Aug 31 21:58:23 UTC 2013

  Unless I missed something, iLO is always on when the machine has 
power; as such, WOL shouldn't be coming into play on reasonably modern 
HP servers.  (That said, the power draw is likely still the reason, 
although I can't readily confirm Charles' observation on my only 
rackmount Gen8.)


On 2013-08-31 13:38, Joel Jaeggli wrote:
> WOL uses 100Mb/s, the phy draws less that way.
> Sent from my iPhone
> On Aug 31, 2013, at 10:13, Charles N Wyble <charles-lists at> wrote:
>> On hp proliant gen8 servers with management and ilo on same port, with the server off the ports show up as 100mbps.
>> Jimmy Hess <mysidia at> wrote:
>>> On Fri, Aug 30, 2013 at 6:42 AM, Jamie Bowden <jamie at> wrote:
>>>>> From: Saku Ytti [mailto:saku at]
>>>> Considering that Dell and HP at least are shipping brand new hardware
>>> with
>>>> IPMI/BMC/iLO/whatever management ports that can only speak 100mbit
>>> when
>>>> every other Ethernet interface in the box at least gigabit, having a
>>> useful
>>>> way to talk to that port without having to keep separate switching
>>> hardware
>>>> around would be nice.  I'm not holding my breath, but you know, along
>>> with
>>>> a pony, this would be nice.
>>> Eh?   That may have been the case a few years ago,  but  HP ILO4 and
>>> iDRAC7  specifically list  10/100/1000 even when using in  dedicated
>>> port
>>> mode.
>>> And even in prior versions,  you could have the port linking up at
>>> 1Gbps,
>>> by operating the management in Shared port mode  (Sharing the
>>> management
>>> with the server's Eth0).
>>> I expect  over time: support for linking up at 10/100 will get rarer
>>> and
>>> much more expensive.
>>> The niche status a 10/100 media converter as an SFP  would have if
>>> produced
>>> is likely to mean it would retail at $2000+ per port device.
>>> It probably just makes more sense to go find an old obsolete  top of
>>> rack
>>> switch,  like a Cat3750  to get the small fraction of legacy copper
>>> ports
>>> required for  out of band network and server management, which:  by the
>>> way,   should be part of a separate switching infrastructure anyways,
>>> to
>>> increase the chance it stays operational and useful for
>>> troubleshooting, in
>>> the event the production network experiences outage or has other issues
>>> requiring diagnosis.
>>>> Jamie
>>> --
>>> -JH
>> --
>> Sent from my Android device with K-9 Mail. Please excuse my brevity.

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