[j-nsp] 100G DAC issue between MX204 and QFX5110

[Antti Ristimäki]

+1

We've had some serious issues with Juniper AOC cables between QFX and MX. It worked with the factory-installed version 15.1X, but then after upgrading QFX to >=17 train caused the AOC work only between two QFX switches, but not between QFX and MX, regardless of FEC etc. configuration. Then finally in some SR release AOC again started to work.

This was AOC specific issue and in fact we have more or less abandoned AOC cables, but nevertheless 100G seems to be much more difficult to interop than previous speed generations.

Antti
 

----- On 20 Jun, 2019, at 16:48, Tim Jackson jackson.tim at gmail.com wrote:

> Don't think it's just you. We've had tons of issues with QSFP28 optics
> across all sorts of hardware.
> 
> --
> Tim
> 
> On Thu, Jun 20, 2019 at 8:38 AM Saku Ytti <saku at ytti.fi> wrote:
> 
>> Is it just me or does 100GE have lot more interop issues than we had
>> with 1GE and 10GE?
>>
>> Vendor rep explained it as MSA being too ambiguous so both can do
>> everything right and still not interop, unsure if defensive or
>> factual.
>>
>>
>> On Thu, 20 Jun 2019 at 16:34, Tim Jackson <jackson.tim at gmail.com> wrote:
>> >
>> > We've actually had the reverse issue where 17.4 is the only release that
>> > some DACs will function. Any 18.x release seems to break them. These
>> aren't
>> > Juniper coded DACs, but just generic coded:
>> >
>> >
>> https://paste.somuch.fail/?248d62d55916f17b#+flZp6LEb0ZY48AI/3rc4YidWw6LENIQTPxpc4O6j7g=
>> >
>> > --
>> > Tim
>> >
>> > On Thu, Jun 20, 2019 at 8:24 AM Chris Wopat <me at falz.net> wrote:
>> >
>> > > We have tested flexoptix 3rd party DAC between MX204 and
>> QFX5120/QFX10002
>> > > with mixed results. Per release notes/ HCL, DAC isn't supported on
>> MX204
>> > > until 18.2
>> > >
>> > > https://apps.juniper.net/hct/product/#prd=MX204
>> > >
>> > > We couldn't link anything with mx204 dac on anything below 18.2. There
>> are
>> > > also a few DAC related PRs in the 18.2r1 release notes.
>> > >
>> > >
>> > >
>> https://www.juniper.net/documentation/en_US/junos/information-products/topic-collections/release-notes/18.2/junos-release-notes-18.2.pdf
>> > > _______________________________________________
>> > > juniper-nsp mailing list juniper-nsp at puck.nether.net
>> > > https://puck.nether.net/mailman/listinfo/juniper-nsp
>> > >
>> > _______________________________________________
>> > juniper-nsp mailing list juniper-nsp at puck.nether.net
>> > https://puck.nether.net/mailman/listinfo/juniper-nsp
>>
>>
>>
>> --
>>   ++ytti
>>
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