Trying to help some colleagues here so I'm short on detail so apologies but hoping there may be something we're all missing.
The TL;DR is we have a mix of older EX2200 and EX2300 we want to connect to an EX4650 and we simply cannot consistently get 1Gbe SFPs to give a link.
Connecting the EX4650 to EX2200s seems OK with the same SFPs.
We've tested with Juniper SFPs and compatibles and the link consistently comes up between the EX4650 and the EX2200 but not the EX4650 and the EX2300.
We've tried all the way up to the latest recommended Junos 23 release.
The PIC groups are set to 1GbE and the links work with the EX2200 which suggests to us the EX4650 is not the issue.
We can loop a couple of 1GbE SFPs together on an isolated EX2300 and the link lights up so we're just completely confused.
We are waiting on TAC but has anyone seen anything similar please?