If we're building a data center and have Juniper, we have hundreds of Juniper switches in a leaf and spine design architecture, and it's horrible. Sometimes after an upgrade, half of the even port can't be detected. They don't recognize third-party SFPs, and now they claim that they don't support that anymore. There are a lot of issues with the hardware and software. Juniper needs to get their code up to par because it isn't stable enough for a leaf and spine design. If you have over 10,000 VMs or Mac addresses, it doesn't scale. I would love Juniper to have more stable features, hardware, and code. We have so many tickets open with Juniper. The switch reboot doesn't detect the port. About 80% of my problems aren't engineering problems, but are Juniper's problems. In comparison, Arista gives me 10% of the problems that Juniper gives me when it comes to hardware and software. It's falling behind compared to Palo Alto because of its features. Juniper's campus switches and data center switches for the leaf and spine design for the overlay and underlay is horrible. I wouldn't recommend that anyone use Juniper fabric, because there are so many problems, issues, and features that aren't supported.
