Experimental Physics and
Industrial Control System

> -----Original Message-----
> From: Jeff Hill [mailto:[email protected]]
> Sent: Friday, August 24, 2001 6:14 PM
> To: [email protected]
> Cc: EPICS-tech-talk
> Subject: RE: Problem talking CA across two CPUs in same crate???

> Perhaps you have the "gateway IP" set in the vxWorks boot 
> parameters. This results in an odd route auto-configured by WRS
> that sends all IP packets to the router even if the destination 
> is on the attached LAN. This can be fixed by using the routeDelete
> command followed by the routeAdd command.

Another problem could be that a backplane IP address was set with the
incorrect subnet mask.  We had this problem.  The "correct" subnet mask for
the backplane is 0xFFFFFFFF, i.e. all 1's.  Not setting a subnet mask for
the backplane IP address will result in the default of 0XFFFF0000, and the
backplane becomes your default route to the world, and it's a dead-end. If
you are not using the backplane network then just delete the backplane IP
address.

Mark Rivers

Replies:

Re: Problem talking CA across two CPUs in same crate??? Andrew Johnson

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