This sounds like activating enhanced-ip and forgetting to reboot the box
immediately after it.

I never saw this type of issue caused by upgrades.

On Sunday, 18 September 2016, Chuck Anderson <> wrote:

> Has anyone upgraded from 14.2 to 15.1 and seen this issue?  Right
> after the upgrade, all loopback filters started dropping all traffic
> causing OSPF & BGP failures, inability to ping or SSH into fxp0, etc.,
> despite being configured to allow the appropriate management & control
> plane traffic which was working perfectly fine in 14.2.
> Deactivating/reactivating the filters "fixed" the issue, as did a full
> box reboot.  Of course JTAC can't reproduce it.  64-bit Junos,
> RE-1800X4's.
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./diogo -montagner
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