On Fri, 30 Dec 2011 07:30:16 +0900, Masataka Ohta said: > IGP is the way for routers advertise their existence, > though, in this simplest case, an incomplete proxy of > relying on a default router works correctly.
Which is sufficient for 99.8% of hosts out there. > Beyond that, if there are multiple routers, having a default > router and relying Yes yes we know, and we've understood this for a quarter century or so. My disagreement is that even though 99.8% of machines *don't* have multiple routers, you seem to be pedantically insisting that some sort of IGP is mandatory for *all* end hosts, even though only 0.2% or so will actually see any benefit at all..
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