[CentOS] 2nd NIC troubles

[Jason T. Slack-Moehrle]

I do have another gateway at 10.0.254.1, it is a Linksys router that all
the provate stuff plugs into, and that Linksys plugs directly into our
modem.


On Tue, Apr 16, 2013 at 10:42 AM, Michael Mol <mikemol at gmail.com> wrote:

> On 04/16/2013 01:37 PM, Jason T. Slack-Moehrle wrote:
> > Hi All,
> >
> > I have 2 NICS in this system. CentOS 6.4
> >
> > eth0 is the virtual IP from PFSense mapping connected to the router,
> works
> > fine.
> >
> > eth1 is a second NIC that I have assigned a private IP to and connected
> it
> > to a switch on the private network. I have many other private devices,
> so I
> > know this setup works.
> >
> > When I connect the cable to the switch and bring up eth1 the system
> > basically stops taking requests. I can no longer SSH in, Websites stop
> > responding, etc. If I walk over to the server and take down eth1,
> > everything works fine.
> >
> > Here is eth0:
> > DEVICE=eth0
> > HWADDR=00:1b:21:cd:80:bf
> > TYPE=Ethernet
> > UUID=68a95912-3915-4b1a-9080-eb2017330153
> > ONBOOT=yes
> > NM_CONTROLLED=yes
> > BOOTPROTO=none
> > IPADDR=192.168.1.27
> > NETMASK=255.255.255.0
> > DNS2=8.8.4.4
> > GATEWAY=192.168.1.1
> > DNS1=8.8.8.8
> > IPV6INIT=no
> > USERCTL=no
> >
> > Here is eth1:
> > DEVICE=eth1
> > HWADDR=00:0a:cd:17:07:7e
> > TYPE=Ethernet
> > UUID=b3851363-ae9e-4066-8993-caed07b9945b
> > ONBOOT=no
> > NM_CONTROLLED=yes
> > BOOTPROTO=none
> > IPADDR=10.0.254.11
> > NETMASK=255.255.255.0
> > GATEWAY=10.0.254.1
> > DNS1=8.8.8.8
> > DNS2=8.8.4.4
> > IPV6INIT=no
> > USERCTL=no
> >
> > I have never experienced this before.
>
> Remove the GATEWAY line from eth1, unless you have another router (with
> its own access to the Internet) at 10.0.254.1. If eth0 points at your
> upstream, then this is unlikely.
>
>
>
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