On 02/03/18 00:29, Terry Barnaby wrote:
> I tied using "ip route" it had the same effect.

[root@f27k ~]# netstat -rn
Kernel IP routing table
Destination     Gateway         Genmask         Flags   MSS Window  irtt Iface
0.0.0.0         192.168.1.1     0.0.0.0         UG        0 0          0 enp0s3
192.168.1.0     0.0.0.0         255.255.255.0   U         0 0          0 enp0s3

[root@f27k ~]# route del default gw 192.168.1.1
[root@f27k ~]# netstat -rn
Kernel IP routing table
Destination     Gateway         Genmask         Flags   MSS Window  irtt Iface
192.168.1.0     0.0.0.0         255.255.255.0   U         0 0          0 enp0s3

[root@f27k ~]# route add default netmask 255.255.255.0 gw 192.168.1.1
[root@f27k ~]# netstat -rn
Kernel IP routing table
Destination     Gateway         Genmask         Flags   MSS Window  irtt Iface
0.0.0.0         192.168.1.1     255.255.255.0   UG        0 0          0 enp0s3
192.168.1.0     0.0.0.0         255.255.255.0   U         0 0          0 enp0s3


>
> On 02/02/18 14:21, Bill Shirley wrote:
>> Use 'ip' and add the dev parameter:
>> ip route add default 173.xxx.yyy.zzz dev ccast
>>
>> man route:
>> NOTE
>>        This program is obsolete. For replacement check ip route.
>>
>> Bill
>>
>> On 2/2/2018 8:42 AM, Terry Barnaby wrote:
>>> A strange one this. I was trying to change the default route of a machine 
>>> for
>>> testing a different gateway.
>>>
>>> I ran:
>>>
>>> route del default gw <gateway1>
>>>
>>> route add default gw <gateway2>
>>>
>>> However the second command did not add the route and I could not add the old
>>> default route back. There were no errors on stdout or in /var/log/messages.
>>>
>>> Now I found that if there is already a default route you can add another 
>>> one, so
>>> could do a:
>>>
>>> route add default gw <gateway2>
>>>
>>> route del default gw <gateway2>
>>>
>>> And these worked fine. It seems you cannot set a default route if there 
>>> isn't one
>>> set.
>>>
>>> Any ideas ?
>>>
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>>
>>
>>
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>
>
>
>
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-- 
A motto of mine is: When in doubt, try it out

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