about lo:0 interface

[Ondrej Zajicek]

On Thu, Jun 19, 2014 at 05:24:45PM +0800, ?????? wrote:
> hi
> 
> My system is Ubuntu 13.04, kernel version is 3.8.0-21-generic, bird version
> is 1.3.10.
> 
> I want to achieve lo: 0 (eg: 192.168.1.1/32) address as the route-id of the
> device, while learning through ospf routing protocol ip address to manage
> the device through this ip address.

Hello

First, I would generally suggest to use newer BIRD.

Second, there is no such thing as lo:0, that is an illusion for legacy
tools like ifconfig. IP addresses (esp. in case of multiple IP addresses
on one interface) should be set by 'ip' tool in Linux.

> Configured as follows:
> 
> 1: I'm on a device configured lo:0 interface address:
> 
> ifconfig lo:0 192.168.1.1/32
> 
> root @ sr1 :/ usr / local / bird # ifconfig lo:0
> lo: 0 Link encap: Local Loopback
>           inet addr: 192.168.1.1 Mask: 0.0.0.0
                                   ^^^^^^^^^^^^^

Seems like the IP address was not set correctly, mask should be
255.255.255.255 . That is the source of your problems.

> The problem is found in bird default route pointing to the interface, and
> the interface address lo not found in the routing table, and why?

Because the mask is 0.0.0.0, therefore prefix length is 0 and therefore
directly attached network prefix is really 0.0.0.0/0, which is announced
by Direct protocol.

> bird> show interfaces
> 1001-lo up (index = 1)
> 1004 - MultiAccess AdminUp LinkUp Loopback Ignored MTU = 65536
> 1003 - 192.168.1.1 / 0 (Primary, scope univ)
>      127.0.0.1 / 8 (Unselected, scope host)

birdc in Ubuntu printed these message codes (100x)? They shouldn't be
seen, that is probably some Ubuntu-specific bug.

-- 
Elen sila lumenn' omentielvo

Ondrej 'Santiago' Zajicek (email: santiago at crfreenet.org)
OpenPGP encrypted e-mails preferred (KeyID 0x11DEADC3, wwwkeys.pgp.net)
"To err is human -- to blame it on a computer is even more so."
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 197 bytes
Desc: Digital signature
URL: <http://trubka.network.cz/pipermail/bird-users/attachments/20140620/96e0a1a9/attachment-0001.asc>