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

Anderson, Charles R cra at wpi.edu
Tue Jun 25 11:13:29 EDT 2019

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

More information about the juniper-nsp mailing list