Not on local subnet

[cirrusio]

So, I went ahead and just formatted the device and the sbRIO seems to have come up with DHCP enabled and falling back to 0.0.0.0 when there is no router response.  Now, I have no idea what to do with this.  Thoughts?

[Mark_Yedinak · Accepted solution]

Can you move temporarily to a network that has a DHCP server so that it will obtain an address. From there you can change the configuration to a static address that will work on the small private network.

[cirrusio]

> Can you move temporarily to a network that has a DHCP server so that it will obtain an address.

This was my thought - but I thought there might be a more elegant solution.

[cirrusio]

So, this is awesome - I hook up a router with DHCP enabled.  Network is 192., sbRIO comes up 169.  Well, at least it has an IP address now, even if it didn't come up on the correct subnet.  Arrrrggggghhhhhh!

[Mark_Yedinak]

Is the DHCP server enabled on the router? That sounds like some very odd behavior.

[cirrusio]

> Is the DHCP server enabled on the router? That sounds like some very odd behavior.

Yup, and to be honest, I have seen similar behavior before.  THIS is why I didn't want to have to format and reconfigure the network settings.

[Mark_Yedinak]

Are you able to get a network trace at the time the sbRIO is booting up? Does the sbRIO include the option to disable the link local address? If so, you may want to give that a try too.

[altenbach]

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@cirrusio wrote:

So, this is awesome - I hook up a router with DHCP enabled.  Network is 192., sbRIO comes up 169.  Well, at least it has an IP address now, even if it didn't come up on the correct subnet.  Arrrrggggghhhhhh!

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169.254.x.x/255.255.0.0 is APIPA, i.e. a random address that devices assign themselves if they cannot find a DHCP server but are configured to obtain one. By default, this is also enabled for windows, so if you don't have a DHCP server, your windows machine will also be on that same network and local communication can proceed. This is useful when connecting random devices on a simple network. (... but boot is slower, because it waits for DHCP timeout before completing startup).

So the question is why your sbRIO does not see the router (DHCP server). Are there any firewall rules, MAC filtering, or such configured on the router?