Setup to link different speed subnets?

Support section for FREESCO v0.4.x

Setup to link different speed subnets?

Postby plaskey » Tue Nov 17, 2009 12:41 pm


I want to use Freesco to allow me to ling two subnets which run at different speeds. The intent is to allow machines that can operate at 1Gb to share data without slowing down to the 100Mb speed of the other network. I want to do this while maintaining full connectivity between subnets (no firewall on this segment, routing all traffic). Freesco is set up with 2 NICs:
Code: Select all
|================== Freesco ==================|
100Mb NIC                        1000Mb NIC
eth0                             eth1                   
gw (to WAN)

Using any default routes and firewall settings. I have a WinXP PC on the subnet configured with the Freesco NIC as it's gateway. This machine can access the internet. Still, I am unable to ping the gateway from a machine on the subnet.

Please help me figure out how to configure Freesco so data can pass freely between the 100Mb and 1000Mb networks. In fact, from the point of view of my main (internet facing) router, I would like the two subnets to appear to be one for NAT purposes. Do I need to create a route? Disable firewall? What am I missing?

Thank you,
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Joined: Mon Nov 16, 2009 6:47 pm

Re: Setup to link different speed subnets?

Postby Lightning » Tue Nov 17, 2009 9:26 pm

The standard "Server" configuration in FREESCO which disables the NAT/firewall will do what you are asking to some degree. However to get the primary network to actually do what you are asking will require extra routing either defined in your primary router along with an extra firewall rule or at a minimum extra routing in all of the primary subnet machines.

If you use something like this into all of your primary network clients it will work and in your main router
route add -net network gw

of course a simpler approach if it is possible with your primary Internet router would be to add the same route along with a NAT forwarding rule so that it handled that traffic routing to the alternate subnet. But without knowing more information about your main router that might not be possible.
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