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 <c...@wpi.edu> 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,
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