cr2-eqiad:xe-4/3/1 has been showing "L3 incompletes" errors (see graphs )
This interface is one of our transit links to Telia.
According to Juniper's documentation, L3 incompletes can be caused either by corrupted packets or non standard packets like Cisco's CTP.
According to our peer's mac address the remote side is indeed a Cisco device.
Even though Cisco's CTP is the main guess, the fact that they are not regular is surprising.
I suggest we do in this order:
- Ask Telia if they see errors on their side
- Ask Telia to disable CTP ("no keepalive" on the Cisco interface)
- If errors continues, investigate the link and the optics
- Last resort if no issues on the link, is to add the statement "ignore-l3-incompletes" on the interface