Saturday, May 9, 2020

Juniper EX4200 not detecting physical link

What's up people?

I have an issue configuring a trunk between a Juniper EX4200 and a Cisco 4500. On the Cisco device, I have link lights and the trunk is up. However, on the Juniper side the port is stuck in admin up / link down. I've swapped out cables and tried 8 different SFPs but cannot get the Juniper device to recognize the link. It sees the SFPs because when I remove them the port disappears from the config and reappears when I reinstall it. I have very little experience with Juniper devices. Any ideas?



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