If you have a high number of network interfaces and the MAC address of some of them starts with a letter (a-f, not 0-9) then it might be a bug we identified.
We encountered the problem on a system with about 400 VLAN interfaces. There the bug delays start of the virtual systems after the OS boot by about 40 minutes! All this additional time is spend by process fwaffinity_apply by repeated nonsensical calls of ctl affinity (each taking about 6 seconds).
At the moment the fix is a private HF PRHF-34015 on top of R81.10 JHF 130 and a HF on top of JHF 150 is currently in preparation.