Unnumbered interfaces and OSPF

[Vincent Bernat]

 ❦ 26 juin 2014 12:39 +0200, Ondrej Zajicek <santiago at crfreenet.org> :

>> I am trying to use unnumbered interfaces and OSPF.
>
> Currently, you have to use peer addresses for unnumbered
> interfaces in OSPF:
>
> On one router:
>
> ip addr add 10.90.255.3 peer 10.90.255.4 dev eth0
>
> On the other:
>
> ip addr add 10.90.255.4 peer 10.90.255.3 dev eth0
>
>
> Although generally you could use the same pair on both interfaces,
> i don't know if i tested such case and if there are no hidden
> problems related to this.
>
> Also note that addresses of unnumbered interfaces are not propagated
> by default, So you would also need some regular or loopback/stub
> interface added to OSPF:
>
> ip addr add 10.90.255.3/32 dev lo

Thanks, it works fine. This removes one advantage of using unnumbered
interfaces with OSPF which is not having to predeclare peer and let OSPF
discover them, but that's not a real showstopper.
-- 
panic("Attempted to kill the idle task!");
	2.2.16 /usr/src/linux/kernel/exit.c