Stories by Jon Espenschied is a senior security consultant in Seattle

Troubles with MPLS a sign of hidden complexity

Multi-site and outsourced IT operations are making good use of Multiprotocol Label Switching (MPLS), but strange trouble is turning up more and more. Often in discussion with local network staffers, we come to the point when I ask about backhaul lines or ISPs over which they presumably run a site-to-site virtual private network (VPN). They happily reply, “Oh, we have MPLS” and provide a network diagram consisting of a suitably inscrutable cloud.

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