Bug #11838
Updated by Jim Pingle about 3 years ago
In certain cases ospf6d will consume all RAM and swap after an interface event. For me, the easiest way to reproduce it is to run ospf6d over IPsec VTI and stop/start IPsec (not restart) or save/apply on the assigned IPsec VTI interface. After either of those events, when IPsec reconnects ospf6d will start consuming memory excessively and lead to system instability. It may eventually recover on its own, though on 21.05/2.6.0 snapshots it appears to lead to a panic (#11839). (another issue is forthcoming for that). It happens on two systems here with 4G RAM+2G swap and 8G RAM+2G swap which are otherwise not heavily loaded so it isn't necessarily tied to actually being low on RAM, but something running away in ospf6d. Maybe nothing we can do about this since it likely must be fixed upstream, but this can stick around for tracking it so users can know we've identified it at least.