[j-nsp] QFX5100-48S-AFI/AFO vs QFX5100-48S-3AFI/AFO

[Thomas Bellman]

On 2021-10-26 23:27, Han Hwei Woo via juniper-nsp wrote:

> Does anyone know if there are any differences between the
> QFX5100-48S versions with or without the '3'? 

The normal version of QFX5100 have two management ethernet ports, one
SFP port and one twisted pair ("RJ45") port, while the 3AFI/3AFO
versions have three management ports, two SFP ports and one twisted
pair port.

I have never seen or used the 3AFI/3AFO version in the real world
myself, but from reading the hardware guide
(https://www.juniper.net/documentation/us/en/hardware/qfx5100/qfx5100.pdf)
it looks like the TP port and one of the SFP ports are actually
shared, so you can use *either*, but not both at the same time, and
that becomes the em0 interface.  (That's what some vendors call a dual
personality port.)  The other SFP port is then the em1 interface.

Otherwise they appear to be identical.


More modern Juniper models appear to only have twisted pair ports,
and it seems pretty random which ones have one port and which ones
have two ports.  For example, in the QFX5120 line, the -48Y and
-48YM modules have two management ports, while the -48T and -32C
models have one.  Weird.

(And hey, Juniper, how about making those management ports actually
useful, and connect them to an IPMI controller with support for Serial
Over LAN?  That would be super helpful, especially when you are e.g.
upgrading Junos on them.)


	/Bellman

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