Re: ARP difficulties with 2.2.x kernels and slink

[David Wright <d.wright@open.ac.uk>]

Sorry to reply to my own posting, but all I've had in response
is one private email concurring that a working ppp under 2.0.x
doesn't work under 2.2.x.

Having played about with arp under 2.2.10, the problem seems to
boil down to this:

# arp -i eth0 -d 888.888.92.28
# arp -i eth0 -s 888.888.92.28 -D eth0
$ arp -n -a
? (888.888.92.28) at 00:A0:24:B8:63:B5 [ether] PERM on eth0
/proc/net/arp contains
888.888.92.28 0x1 0x6 00:A0:24:B8:63:B5 * eth0

# arp -i eth0 -d 888.888.92.28
# arp -i eth0 -s 888.888.92.28 -D eth0 pub
$ arp -n -a
? (888.888.92.28) at * PERM PUP on eth0
/proc/net/arp contains
888.888.92.28 0x1 0xc 00:00:00:00:00:00 * eth0

In both cases, other machines show
? (888.888.92.28) at <incomplete> on eth0

So it appears that publishing the ARP entry kills the hardware
address which negates the whole point of publishing it anyway.


Quoting David Wright (d.wright@open.ac.uk):
[...]
> 
> I've read www.debian.org/releases/2.1/running-kernel-2.2
> and installed www.debian.org/~rcw/2.2/netbase/netbase_3.12-2_i386.deb
> but am not using the other things like dhcp, pcmcia, isdn, bootpc,
> diald.
> 
> I've removed the redundant route commands from /etc/init.d/network.
> At home, I delete the redundant route to the .92 network that
> 2.2.x makes, and resolv.conf is filled/emptied by ip-up/down.
> 
> I've noticed that /proc/sys/net/ipv4/ip_forward is set to 1 in 2.0.36
> and 0 in 2.2.10 by default so I changed it to 1 but with no effect.
> 
> What have I missed?

Cheers,

-- 
Email:  d.wright@open.ac.uk   Tel: +44 1908 653 739  Fax: +44 1908 655 151
Snail:  David Wright, Earth Science Dept., Milton Keynes, England, MK7 6AA
Disclaimer:   These addresses are only for reaching me, and do not signify
official stationery. Views expressed here are either my own or plagiarised.