Pings Fail from a Host to Its Default Router
Now, on to a second scenario. The engineer has checked out a problem with commands on the host and on that host’s default router. All the IPv6 settings on the host and the default router look good. However, when the user at the host pings faraway servers, the pings, both by name and by IPv6 address, fail.
As a next step, the network engineer tries to narrow down the scope a bit with some local pings. The engineer asks the user to just ping from the host to the default router IPv6 address. This ping fails, as well. The engineer tries the reverse—a ping from the default router to the host—and it fails as well.
To summarize, the host cannot ping its default router or vice versa. With these initial problem ...
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