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SubjectRe: Wired behaviour with IPv6 over PPP
On Wed, 21 May 2008 14:56:43 +0200 Matthias Cramer <> wrote:

> Hi All
> I have a very wired behaviour when doing IPv6 over PPPoE.
> The situation:
> A linux box connected to a DSL Modem, on the other side is a Cisco LNS which terminates the PPP session (actually L2TP).
> I have control over both ends.
> When I have net.ipv6.conf.all.forwarding set to 0 then the ppp Interface gets a IPv6 address from the Cisco via IP6CP.
> When I have net.ipv6.conf.all.forwarding set to 1 them the ppp Interface does not get an address, it has only a normal link local address.
> When I start the ppp session with forwarding set to 0 I can ping out and there exists a default route to ppp0 , then I switch forwarding to 1
> the default route disappears and therefore routing does not work any longer.
> Is this a known behaviour ?
> Or am I doing something the wrong way ?
> Kernel version is 2.6.25

(cc netdev)

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