[j-nsp] Link establishment issues with 1Gbps SX/LX SFPs on QFX5110

[Eldon Koyle]

Here is a sampling of PRs (there have been a _lot_ in the PR subscription
emails recently):


(EX4300)
PR1420343
<https://prsearch.juniper.net/InfoCenter/index?page=prcontent&id=PR1420343&actp=SUBSCRIPTION>
When
using 1G SFP in 10G ports, neet to configure interface as no-autoneg

PR1422958
<https://prsearch.juniper.net/InfoCenter/index?page=prcontent&id=PR1422958&actp=SUBSCRIPTION>
QFX5100-48T
10G interface might be auto-negotiated at 1G speed instead of 10G

PR1411852
<https://prsearch.juniper.net/InfoCenter/index?page=prcontent&id=PR1411852&actp=SUBSCRIPTION>
V44
QFX5110 : auto-negotiation is not disabled in hardware after setting
no-auto-negotiation option in cli

-- 
Eldon

On Tue, Jun 25, 2019, 09:13 Anderson, Charles R <cra at wpi.edu> wrote:

> The same problem exists on 18.x on EX4300 standalone or VC (not Fusion).
>
> On Mon, Jun 24, 2019 at 09:49:45PM +0000, Timothy Creswick wrote:
> > Hi All,
> >
> > We've been battling with a number of issues getting 1G Base-X links to
> work on a batch of new QFX5110-48S switches, in use as Fusion devices
> connected to MX204.
> >
> > No problems with a variety of 10G and 100G connections. A lot of 1G
> works fine but we seem to have issues with auto-negotiate with both SX and
> LX optics. JTAC are a bit lost and we've tried a variety of firmwares with
> varying success. Turning auto-negotiate off on both sides seems to fix most
> of this, but that's not viable in a lot of cases where there's a 3rd party
> involved.
> >
> > Anyone seen similar and aware of a fix?
> >
> > Regards,
> >
> > Tim
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