[j-nsp] EX4300 and full-duplex-only

[Frank Sweetser]

On 09/23/2015 09:47 AM, Phil Mayers wrote:
> If you mean "why it's only duplex limitations", I'm guessing the device is
> missing the collision-detect/retransmit hardware for cost reasons. 10/half is
> pretty rare these days and, in theory, they're pitched as a datacentre device
> (though we have an IBM tape library which is 10/half on it's management port).

When I first saw the details about the EX4300, my initial reaction was that it 
was built as a low cost 1Gb dongle for QFabric.

> You can force the link up by disabling autoneg, but that comes up
> duplex-mismatched - 10/full at the EX end, 10/half at the device end.
>
> All very disappointing; we did not think to specify "must comply with IEEE
> 802.3" in the RFP :o/


Even putting it in wouldn't have helped unless you verified it yourself anyway 
- they list 802.3 support on page 19 of the data sheet:

http://www.juniper.net/assets/us/en/local/pdf/datasheets/1000467-en.pdf

That said, does anyone know if the EX3300 switches suffer from this same 
design decision?

-- 
Frank Sweetser fs at wpi.edu    |  For every problem, there is a solution that
Manager of Network Operations   |  is simple, elegant, and wrong.
Worcester Polytechnic Institute |           - HL Mencken