Re: [opensuse] Why no IPv6 link local address?

2 Jan 2012

      Sujit Karatparambil wrote:
...
On Mon, Jan 2, 2012 at 3:35 AM, James Knott  wrote:
...
My firewall is an old computer running openSUSE 11.3 and I have IPv6 running
on it.  However, the NIC facing my cable modem does not show an IPv6 link
local address, which every NIC is supposed to have, if IPv6 is enabled.  The
NIC facing my LAN has both link local and public unicast addresses.  I had
considered that something in my cable modem might be inhibiting it, but when
I plug my notebook computer directly into the modem, it has a link local
address.
IMO, what you are saying is that there is a problem with the modem and IPV6.
I donot think of a hard and fast rule to what you are saying.
No, that's not what I'm saying.  When IPv6 is enabled, every NIC should 
have a link local address, regardless of what it's connected to.  When I 
boot that same computer with a Live CD, that NIC will have a link local 
address.  Also, when I connect my notebook directly to the modem, it 
will also have one.  So, there's nothing wrong with the modem or the 
computer hardware.  There's something within 11.3 that's killing that 
link local address.  There's a line
...
...
I tried booting from a live 12.1 CD and had link local addresses on both LAN
&  WAN interfaces, so there's something in openSUSE 11.3, as installed,
that's disabling it.  I tried turning off the firewall, but that also didn't
make any difference.
Any idea why that one NIC doesn't have a link local address?
http://tldp.org/HOWTO/html_single/Linux+IPv6-HOWTO/#AEN811
I can manually add an IPv6 address in the link local range (starting 
with "FE80") and ping it.

Also, there's a section in /etc/sysconfig/network/config that's supposed 
to enable link local addresses for all NICs:

## Type:        string
## Default:     "eth*[0-9]|tr*[0-9]|wlan[0-9]|ath[0-9]"
#
# Automatically add a linklocal route to the matching interfaces.
# This string is used in a bash "case" statement, so it may contain
# '*', '[', ']'  and '|' meta-characters.
#
LINKLOCAL_INTERFACES="eth*[0-9]|tr*[0-9]|wlan[0-9]|ath[0-9]"

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