[KLUG Members] Packet routeing

[John Pesce]

On Thu, 24 Jul 2003, Tony Gettig wrote:

> Quoting John Pesce <pescej@sprl.db.erau.edu>:
> 
> > Ok. Here is a weird request I got from the higher ups regarding another 
> > project.  One project is using UDP multicast to pass around data from 
> > several programs on several machines on a local net using a multicast 
> > group.  This program apparently needs to no which computer sent the data, 
> > so it looks at the source address of the UDP packet.
> > 
> > Now they would like to do the same thing, but with programs located on two 
> > subnets which are in different states.
> 
> How are the sites connected? VPN? Leased line?

Apparently there will be three sites connected via leased lines and 
multicast capable routers. There are currently no plans for a VLAN since 
only machines using this data will be on these leased lines.



> > How can I bridge the gap? My only experience with multicast is to get 
> > programs chatting on a local subnet. I think the requirement to keep the 
> > source address of the packet might cause problems.
> 
> Is there any way to put all those devices that need to speak to each other in 
> their own vlan? Might that permit what you're trying to do? I don't know 
> specifically how to do this, but for instance, it is common to put 
> infrastructure like switches in their own "management" vlan. Where I work, we 
> put different types of users and devices in different vlans based on many 
> factors. But all of our buildings are in the same city and connected via fiber.
> 
> > 
> > This is a many server to many client situation, like a peer-to-peer 
> > multicast group.
> > 
> > is this as simple as turning on PIM-DM on the routers on both subnets and 
> > in between?
> > 
> > Help please,
> > John
> 
> 
> 

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|                                    Software Engineer               |
|       John Pesce          o     o  Air Traffic Management Lab      |
| pescej@sprl.db.erau.edu    \|||/   Space Physics Research Lab      |
|     (386) 226-7437         (o o)   Embry-Riddle Aeronautical Univ. |
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