[CentOS] Simple routing question
John R Pierce
pierce at hogranch.com
Tue Sep 4 20:51:45 UTC 2012
On 09/04/12 1:25 PM, James B. Byrne wrote:
> I have host A with eth0[aaa.bbb.ccc.A] and eth1[192.168.216.A]
> I have host B with eth0[aaa.bbb.ccc.B] and eth1[192.168.209.B]
what are the subnet masks defined on 192.168.216.A and 192.168.209.B ?
> and I have host C as the gateway with eth0 being the WAN and eth1
> being the LAN. Eth1 on C has the address [aaa.bbb.ccc.1] assigned to
> it and has the alias [192.168.0.1] as well.
assuming the answer to my above question is 255.255.255.0, then noone
has a route to this 192.168.0.1 as its in an entirely different
subnet. you can't overlap subnets with different size masks without
creating some serious messes.
> I want traffic from 192.168.216.A addressed to 192.168.209.B to go to
> eth1 on B. Instead it goes to Eth0 on C where it dies as one would
there's no route defined to do that, since 192.168.209.B is not in any
network that A has knowlege of. A would need an IP in the B subnet,
and B would need an IP in the A subnet for this to work.
why do you have two seperate LAN subnets? are you running two seperate
LANs ? there have to be some really good reasons before I create
anything this messy.
host A with eth0[aaa.bbb.ccc.A] and eth1[192.168.216.A] and eth1[192.168.209.A]
host B with eth0[aaa.bbb.ccc.B] and eth1[192.168.209.B] and eth1[192.168.216.B]
now A can reach B via its eth1 as it now has a route to 192.168.216/24
john r pierce N 37, W 122
santa cruz ca mid-left coast
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