[165368] in North American Network Operators' Group
Re: subrate SFP?
daemon@ATHENA.MIT.EDU (Joel Jaeggli)
Sat Aug 31 15:39:00 2013
In-Reply-To: <e4ac2a88-8a90-4e12-b8ef-c20ddabf80ef@email.android.com>
From: Joel Jaeggli <joelja@bogus.com>
Date: Sat, 31 Aug 2013 12:38:34 -0700
To: Charles N Wyble <charles-lists@knownelement.com>
Cc: "nanog@nanog.org" <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
WOL uses 100Mb/s, the phy draws less that way.=20
Sent from my iPhone
On Aug 31, 2013, at 10:13, Charles N Wyble <charles-lists@knownelement.com> w=
rote:
> On hp proliant gen8 servers with management and ilo on same port, with the=
server off the ports show up as 100mbps.=20
>=20
> Jimmy Hess <mysidia@gmail.com> wrote:
>> On Fri, Aug 30, 2013 at 6:42 AM, Jamie Bowden <jamie@photon.com> wrote:
>>=20
>>>> From: Saku Ytti [mailto:saku@ytti.fi]
>>> 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.
>>=20
>> 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.
>>=20
>> 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).
>>=20
>> I expect over time: support for linking up at 10/100 will get rarer
>> and
>> much more expensive.
>>=20
>>=20
>> 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.
>>=20
>>=20
>> 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.
>>=20
>>=20
>>=20
>>> Jamie
>>=20
>> --=20
>> -JH
>=20
> --=20
> Sent from my Android device with K-9 Mail. Please excuse my brevity.
>=20
