[CentOS] Applying changes to route-eth0

[Robert Moskowitz]

On 1/30/19 12:51 PM, mark wrote:
> Robert Moskowitz wrote:
>> I have a series of static routes in route-eth0
>>
>> Recently I had to made changes and could not find an effective way to
>> get the old routes out and the new routes in.
>>
>> ifdown-route seems to apply the content of route-eth0 to take down the
>> routes listed and ifup-route brings up routes based on route-
>>
>> So what ends up is that the old routes never go away, just new routes
>> added.
>>
>> ifdown eth0; ifup eth0
>>
>> works, but is a bit heavy-handed for only changing routes.
>>
>> So how do I clear out the routing table and have it rebuilt based on
>> ifcfg-eth0 and route-eth0 without bouncing the interface completely?
> Can't you do ip route delete ...?

I did some digging and came up with:

ip route flush table main; ifup-route eth0

This only works if the only entries in the routing table are for eth0.  
Which is my case.