SV: [LARTC] iproute2 and routing entries

Linux Advanced Routing and Traffic Control

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I have used mask to /32 (255.255.255.255) to get control over the routing
table. It's useful then you want to save IP-addresses.

Regards,
Daniel

> -----Ursprungligt meddelande-----
> Från: lartc-admin@xxxxxxxxxxxxxxx
> [mailto:lartc-admin@xxxxxxxxxxxxxxx]För Martijn van Oosterhout
> Skickat: Monday, November 06, 2000 12:40 PM
> Till: bert hubert
> Kopia: lartc@xxxxxxxxxxxxxxx
> Ämne: Re: [LARTC] iproute2 and routing entries
>
>
> bert hubert wrote:
> >
> > On Thu, Nov 02, 2000 at 06:35:48PM +0100, Michael Schoen wrote:
> > > Hi guys,
> > >
> > > i am just playing around with iproute2 and some questions
> came to my mind.
> > >
> > > I´m wondering why I get a route entry for the subnet of eth0s
> primary addr
> > > if I use the command "ip link set eth0 up".
> > >
> > > I´m personally not a friend of such behaviour, because I
> often need some
> > > strange routing set-ups. Is it possible to avoid this
> behaviour, meaning I
> > > only get routing entries if I really set them by myself?
> >
> > This behaviour has been hotly contested on the linux kernel mailinglist,
> > perhaps the archives can tell you if there is a way around this.
>
> The reason is that by setting an interface with the IP address A
> and netmask
> B you are implying that there is a network attached with the
> network address
> A&~B with the given netmask and so a route should be added appropriately.
>
> The last I heard was that one of the networking guys gave this
> explanantion
> and challenged someone to give an example of where this was the wrong
> thing to do. The thread died there IIRC.
>
> Personally I think it's a great feature because in at least 99.99% of
> cases it's exactly what you want and I havn't found an example of the
> other 0.01%.
>
> --
> Martijn van Oosterhout <kleptog@xxxxxxxxxxxxxxxxxxxxx>
> http://cupid.suninternet.com/~kleptog/
>
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