Cisco, Juniper, et al have built/are building a lot of networking gear around Cavium and Broadcom multicore MIPS parts. Intel is muscling back in to the arena,

Cisco, Juniper, et al have built/are building a lot of networking gear around Cavium and Broadcom multicore MIPS parts. Intel is muscling back in to the arena, though. The IXP was an interesting family, but I recall the toolchain being less than pleasant - although at that time the MIPS vendors weren't covering themselves in glory either.