It may be worthwhile making some of the unused Ethernet ports available as pin headers on the board.
This would allow additional linking of boards locally without requiring the magnetics and protection components.
On 04/11/16 14:12, fboehm wrote:
> I don't have a specific use-case. I'm just trying to help Pedro to
> clarify this technical detail.
>
> But it might be a problem that the official specifications from
> Librerouter are including 2x Gigabit Ethernet. Those I assume somebody
> had a use-case in mind where this is needed. Maybe something like
> daisy-chaining Librerouters.
exactly :)
the idea is to be able to put two librerouters on the same pole, one
powered from the floor with a long cable, and the other one powered over
PoE passthrough via a short ethernet cable, and have a gigabit link
between them. So, you can make 4 independent p2p links from the same
"node", with full performance
the bug in the specsheet, in any case, is that ar8327 is not specified;
thanks for the pointer!
>
> Franz
>
> Am 2016-11-04 um 13:41 schrieb T Gillett:
>> Could you outline the use case for the two Gigabit ports in use?
>>
>>
>> On 04/11/2016 1:31 PM, "fboehm" <fboehm@aon.at <mailto:fboehm@aon.at>>
>> wrote:
>>
>> According to the following document there's no separate switch chip
>> (like AR8327) within Librerouter. Therefore you would only have a
>> single Gigabit Ethernet interface.
>>
>>
>> https://librerouter.org/media/document/librerouter_ specifications_v3.pdf
>>
>> <https://librerouter.org/media/document/librerouter_ >specifications_v3.pdf
>>
>>
>> Although the same document mentions "2x Gigabit Ethernet RJ-45".
>>
>> If I understand the AR9344 datasheet correct, the second Gigabit
>> interface has to go through the internal 100Mbps switch. Therefore
>> the OS would show 1000Mbps but in real life you are limited to
>> 100Mbps.
>>
>> Not very nice :(
>>
>> Franz
>>
>> Am 2016-11-04 um 12:43 schrieb T Gillett:
>>
>> The attached screenshot from the Atheros Reference circuit
>> shows the
>> AR9344 supporting 5 x 10/100 Ethernet ports and the AR8327 chip
>> supporting 5 x 10/100/1000 Ethernet ports.
>>
>> On Fri, Nov 4, 2016 at 7:20 AM, fboehm <fboehm@aon.at
>> <mailto:fboehm@aon.at>
>> <mailto:fboehm@aon.at <mailto:fboehm@aon.at>>> wrote:
>>
>> Am 2016-11-04 um 01:21 schrieb guifipedro:
>>
>> Hi,
>>
>> Specifications Sheet v3 from Librerouter says:
>>
>> 2 x Gigabit Ethernet RJ-45
>>
>> This [1] (Preliminary version) says:
>>
>> "The Ethernet switch is a highly integrated twoGb MAC
>> plus
>> 5-port fast
>> Ethernet switch with non-blocking switch fabric"
>>
>> I understand this means:
>> 5-port fast Ethernet switch
>> 2 x Gigabit ethernet RJ-45
>>
>> But I don't see this 2 gigabit ethernet in the features
>> (first
>> page).
>> Is there a definitive version of what capabilities have
>> AR9344? PDF?
>>
>> Cheers,
>> Pedro
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>> <mailto:LibreRouter@listas.librerouter.org >>
>>
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>>
>> According to AR9344 datasheet GMAC1 (2nd Gigabit interface
>> in the
>> SoC) is hardwired to the Fast Ethernet switch. As this
>> switch is
>> only Fast Ethernet capable it's creating a bottleneck.
>>
>> Only GMAC0 (1st Gigabit interface) provides externally
>> accessible
>> RGMII pins (Reduced Gigabit Media Independent Interface).
>>
>> But I could be wrong :)
>>
>> Franz
>>
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