overwriting default route error

[Cliff Wright]

On my laptop I use both the bce, and ath network interfaces with
dhcp enabled. This causes the /sbin/dhcp-script to run, first setting
a default route from the bce interface, then from the ath interface.
The script does not delete the first default route before setting
the next one. this causes a problem. If I do a get route xxx,
the local address is set to default, and indeed if I do a ping to
xxx the source address is set to 0.0.0.0 (which results in a failed
ping). As a work around I modified the script to first delete a
default route before setting a new one. However I am thinking this
could be a kernel bug. Should the kernel really expect a user space
program/script to delete the default route before setting a new one?
Cliff

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[Arnaud Lacombe]

Post by Cliff Wright
On my laptop I use both the bce, and ath network interfaces with
dhcp enabled. This causes the /sbin/dhcp-script to run, first setting
a default route from the bce interface, then from the ath interface.
The script does not delete the first default route before setting
the next one. this causes a problem. If I do a get route xxx,
the local address is set to default, and indeed if I do a ping to
xxx the source address is set to 0.0.0.0 (which results in a failed
ping). As a work around I modified the script to first delete a
default route before setting a new one.

IIUC, this is PR/22418 .

More discussion followed on tech-userlevel on October 2006:
http://mail-index.netbsd.org/tech-userlevel/2006/10/06/0010.html

I didn't get any reply after my last mail.

Post by Cliff Wright
However I am thinking this
could be a kernel bug. Should the kernel really expect a user space
program/script to delete the default route before setting a new one?

you could tell the kernel to change the default route: `route change
default ...' but you can't *add* a default route if one already exist.

- Arnaud


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