Check FEC settings. Try turning FEC on or off on both sides. Arista: (config-if)#error-correction encoding reed-solomon
Juniper: set interfaces et-0/0/1 gigether-options fec fec91 On Sat, May 11, 2019, 6:32 AM Jason Lixfeld <[email protected]> wrote: > I had no idea auto-negotiation was still a thing with 100G, but in any > event, toggling auto negotiation didn’t work. > > > On May 11, 2019, at 2:21 AM, Eric Krichbaum <[email protected]> wrote: > > > > I had a similar issue with 18.x and MX204. Did you try turning off > auto-negotiation? > > > > set interfaces et-4/0/52 ether-options no-auto-negotiation > > > > I had a similar issue with QFX5100/EX4300 and 40G and this fixed the > issue oddly enough. > > > > Eric > > > > -----Original Message----- > > From: juniper-nsp <[email protected]> On Behalf Of > Jason Lixfeld > > Sent: Friday, May 10, 2019 6:13 PM > > To: juniper-nsp <[email protected]> > > Subject: [j-nsp] QSFP28 oddities between Arista and QFX after upgrade > > > > Hey, > > > > I have a QFX5110 in the lab which I upgraded from 17.something to 18.4 > to resolve some ISIS weirdness. ISIS weirdness resolved, but now the > previously working link between this QFX and an Arista 7280SR no longer > comes up, despite light levels on both sides being within norms. I went > from 18.4 to 19.1 just for the hell of it, and still no bueno. > > > > The QSFP28 in the QFX comes up if it’s looped to itself, as does the > QSFP28 in the Arista. The Arista QSFP28 links to another Arista, or an > MX204. The QFX QSFP28 links to the same MX204 as well (no other QSFP28 > gear to test with otherwise) so it seems to be a weird compatibility issue > between the Arista and the QFX? > > > > Does this sort of thing smell familiar to anyone? I’ve had pretty good > luck with 100G compatibility in general so far, so I’m not overly familiar > with any knobs to work around any compatibility issues that may creep up > here or there, so happily accept some pointers if anyone has some clue. > > > > Thanks! > > _______________________________________________ > > juniper-nsp mailing list [email protected] > https://puck.nether.net/mailman/listinfo/juniper-nsp > > > > > > --- > > This email has been checked for viruses by Avast antivirus software. > > https://www.avast.com/antivirus > > > > _______________________________________________ > juniper-nsp mailing list [email protected] > https://puck.nether.net/mailman/listinfo/juniper-nsp > _______________________________________________ juniper-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/juniper-nsp
