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

[Eldon Koyle]

And a TSB:

TSB17538
<https://kb.juniper.net/InfoCenter/index?page=content&id=TSB17538&actp=SUBSCRIPTION>
Traffic
drop is seen on EX4300 when 10G Fiber port is using 1 Gigabit Ethernet SFP
optics with Auto Negotiation enabled

-- 
Eldon


On Tue, Jun 25, 2019, 23:01 Eldon Koyle <ekoyle+puck.nether.net at gmail.com>
wrote:

> 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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>>
>