Valdis.Kletnieks@vt.edu wrote:
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..
Not. Though hosts should implement some IGPs, the default can be to just depend on default routers supplied from DHCP. A better default could be that IGP will be automatically invoked if DHCP does not supply a default router. If there are multiple IGPs are implemented, snooping IGPs' advertisement to know which is the locally available IGP may also be a good idea. My point w.r.t. multiple next hop routers is that RA supplied information is not good enough, which means DHCP is no worse than RA even if there are multiple next hop routers. Masataka Ohta