[j-nsp] MX upgrade to 15.1R4.6: loopback filters drop all traffic

Chuck Anderson cra at WPI.EDU
Sun Sep 18 03:18:09 EDT 2016

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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