Trouble with networking on Google Compute Engine (NetBSD 7)

[Benny Siegert <bsiegert%gmail.com@localhost>]

Hi!

I am still trying to get NetBSD 7 running on Google Compute Engine natively. The only remaining issue (AFAICT) is networking.

Here is how the GCE networking works: Each VM in a given project gets a private IP address, for example 10.240.0.4, with a netmask of 255.255.255.255. The DHCP response contains a „classless static route“ extension (121) to set a direct route to 10.240.0.1/32 on the same interface. In addition, there is a default route with 10.240.0.1 as gateway.

With -current and dhcpcd (not dhclient), this works fine.

With NetBSD 7 and the dhcpcd there (which AIUI is an older version), I get several error messages (that I forgot to write down) and no working network. wiz@ recommended dhcpcd-6.11.3 from pkgsrc, and that only emits a single error message: „add to routing socket: network is unreachable“ when adding the default route.

I tried adding the routes manually but that gets me the same error message:

route flush
route add -host 10.240.0.1 -interface vioif0
route add default 10.240.0.1

The last command fails with the „network is unreachable“ message.

I suspect that at this point, I may be running into a kernel bug / limitation that has been fixed in -current. Any ideas? 

—Benny.