How can the Internet have too many routes, but not enough addresses?

By Stephen LawsonAugust 20, 2014 05:18 PM ET As IPv4 runs out of space, attempts to get around the problem could make things even more complicated. IDG News Service - The depletion of Internet addresses would seem to spell relief for aged routers that are struggling to deal with the Internet's growth, but the complicated interplay between those trends might cause even more problems.
Last Wednesday, some older routers and switches stumbled when the Internet's table of routes surpassed 512,000 entries, the maximum they could hold in a special form of memory called TCAM (Ternary Content Addressable Memory). The event drew widespread attention, though it was actually the third time in this young century that the Internet had broken through such a threshold. The number of routes exceeded 128,000 around 2003 and 256,000 in 2008, each time causing problems for some outmoded gear.
 
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