[j-nsp] Using Cisco SFP's on Juniper 4500's

[Tassos Chatzithomaoglou]

Mark Tinka wrote on 12/09/2014 17:13:
> On Friday, September 12, 2014 03:53:32 PM Chris Gotzmann
> wrote:
>
>> Mark,
>> That makes no sense logically. Clients would be able to
>> connect 100% or 0%, there wouldn't be an in-between
>> based on the vendor gbic.
>
> So to give more detail, a laptop and Cisco switch connect
> fine.
>
> But a Tejas SDH box does not. I'm thinking it's because the
> Cisco copper SFP can run only at 1Gbps, while a properly
> coded Juniper one (or a Cisco one that will work) supports
> tri-rate, given the Tejas did not do anything faster than
> 100Mbps.
>
> Mark.
>

We have seen Cisco copper 10/100/1000BaseT SFPs (GLC-T, SFP-GE-T) work only in 1000BaseT when inserted into MX routers, like Juniper's own SFP-1GE-T.
So, we also have some Juniper SFP-1GE-FE-E-T which work in 10/100/1000, in order to cover all scenarios.

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Tassos