[CentOS] default gw route has gone? SOLVED

Thu Jan 16 08:00:17 UTC 2014
Rob Kampen <rkampen at kampensonline.com>

On 01/16/2014 11:28 AM, Rob Kampen wrote:
> Weird behaviour.
> A couple of days ago I installed another DSL router.
> During the process I have somehow caused the default gw route to 
> disappear - on system start up the interface comes up fine, I can see 
> and connect to the local subnet but not to the internet.
>
> [rkampen at timsws network-scripts]$ route
> Kernel IP routing table
> Destination     Gateway         Genmask         Flags Metric Ref    
> Use Iface
> 192.168.1.0     *               255.255.255.0   U 0      0 0 eth0
> link-local      *               255.255.0.0     U 1002   0 0 eth0
>
> is what I get at startup.
> I need to add
>
> sudo route add default gw 192.168.1.1
>
> to get things working properly.
> [rkampen at timsws network-scripts]$ route
> Kernel IP routing table
> Destination     Gateway         Genmask         Flags Metric Ref    
> Use Iface
> 192.168.1.0     *               255.255.255.0   U 0      0 0 eth0
> link-local      *               255.255.0.0     U 1002   0 0 eth0
> default         192.168.1.1     0.0.0.0         UG 0      0 0 eth0
>
> Google shows me a number of responses that all tell me to add a line 
> to /etc/sysconfig/network
> which I already had.
>
> [rkampen at timsws network-scripts]$ cat /etc/sysconfig/network
> NETWORKING=yes
> HOSTNAME=timsws
> GATEWAY=192.168.1.1
>
> and
> [rkampen at timsws network-scripts]$ cat 
> /etc/sysconfig/network-scripts/ifcfg-eth0
> DEVICE="eth0"
> NM_CONTROLLED="yes"
> ONBOOT=yes
> TYPE=Ethernet
> BOOTPROTO=dhcp
> DEFROUTE=no
> IPV4_FAILURE_FATAL=yes
> IPV6INIT=no
> NAME="System eth0"
> UUID=5fb06bd0-0bb0-7ffb-45f1-d6edd65f3e03
> HWADDR=00:24:8C:80:0B:15
> PEERDNS=yes
> PEERROUTES=yes
> LAST_CONNECT=1389583930
>
> So what am I missing?
Thanks to those that responded.
Turns out that having defroute=no is the problem - really helps to 
actually read what is in the ifcfg-eth0 file.

On a side note - the various ADSL broadband routers supplied by the NZ 
telcos all seem to have missing or broken bits - the vodafone one 
doesn't open the firewall properly for incoming http - the telecom 
device allows one to specify a different IP address for the router but 
not the gw address - thus it only works if you use their default IP/gw 
address. So many hours wasted.
> BTW - all other devices are working just fine - just my main CentOS 
> 6.5 WS fails.
> TIA
>
>
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