[hpsdr] Metis/Hermes with multiple NICs in SDR host PC

[Duane - N9DG]

After an off list response and then also downloading V1.2 of the Metis documentation, I find this on page 9:

"If a static IP address is assigned and Metis is connected to a second Ethernet port on a PC then the address assigned must be on a different sub net. For example if the first port on the PC is using 192.168.x.x then use 10.x.x.x for the Mets and the second port."

So should in theory my 192.168.1.x and 192.168.2.x networks each setup with subnet masks of 255.255.255.0 meet the requirement/definition of being different sub nets? At least that is what I though I was achieving with my NIC configurations.

Duane
N9DG

--- On Sun, 7/24/11, Duane - N9DG <n9dg at yahoo.com> wrote:

From: Duane - N9DG <n9dg at yahoo.com>
Subject: [hpsdr] Metis/Hermes with multiple NICs in SDR host PC
To: hpsdr at openhpsdr.org
Date: Sunday, July 24, 2011, 9:03 AM

***** High Performance Software Defined Radio Discussion List *****


Today I discovered that my machine with two NICs in it will only connect to the Metis if the other NIC that is not directly connect to the Metis is unplugged. The NIC that is directly connected to the Metis is first in the NIC binding order, so NIC binding order I don't believe has any bearing on what I'm seeing. So the machine is currently setup like this:

Mobo NIC 192.168.1.x network > to a switch with other machines on it. 
PCIe NIC 192.168.2.x network > directly connected to Metis.

I don't think this was an issue of the Metis port being dormant before boot up because a reboot of the W7x64 box after I first encountering this (and while leaving the Metis powered up) did not change the behavior. It wasn't until I unplugged the cable from the mobo NIC that PSDR would find the Metis/Mercury. Even PSDR couldn't connect to the Metis I
 could ping it. I have a static IP assigned to the Metis. Is there a PSDR (1.19.3.4 BaseSVN 3444) design limitation that can account for what I discovered?

My ultimate goal is to be able to drive two Hermes from one machine and have a NIC configuration as follows:

Mobo NIC 192.168.1.x network > to a switch with other machines on it. 

PCIe NIC #1 192.168.2.11 network > directly connected to Hermes #1.
PCIe NIC #2 192.168.2.12 network > directly connected to Hermes #2.

Will there be provisions in future code to accommodate the above scenario? Specifically running multiple NICs and multiple instances of PSDR (or other flavors of SDR SW) on one machine? I don't have a second Metis/Mercury on hand to try this myself..

If someday there is raw PC horsepower enough, I could even see wanting to go beyond having just two instances of SDR SW on one machine someday. 

73,
Duane
N9DG


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