Looks like cisco may actually have started testing leapseconds now: https://tools.cisco.com/quickview/bug/CSCut43397 -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 phk at FreeBSD.ORG | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence.