Re: 2 Subnets on 1 Lan

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Thom Paine wrote:
Can I add the eth0:0 from the command line somehow or do I need to run
system-config-network?

I don't have linux on this machine I'm working on today and need to do
this remotely with ssh.

Thanks.
# ifconfig
eth0      Link encap:Ethernet  HWaddr 00:0C:6E:1C:65:4B
          inet addr:192.168.32.68  Bcast:192.168.32.255  Mask:255.255.255.0
...
# ifconfig eth0:1 172.16.2.65/22
...
# ifconfig
eth0      Link encap:Ethernet  HWaddr 00:0C:6E:1C:65:4B
          inet addr:192.168.32.68  Bcast:192.168.32.255  Mask:255.255.255.0

eth0:1    Link encap:Ethernet  HWaddr 00:0C:6E:1C:65:4B
          inet addr:172.16.2.65  Bcast:172.16.3.255  Mask:255.255.252.0
...
The route from pc to devices within the new net is automatically added.
# route
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
192.168.32.0    *               255.255.255.0   U     0      0        0 eth0
172.16.0.0      *               255.255.252.0   U     0      0        0 eth0

But as you mention, if you want the new net address routed outside, you are going to need to set their mask/gw address correctly, and probably provide inbound firewall / routing.

DaveT.


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