Package: ifupdown Version: 0.6.8+nmu1 Tags: IPv6 Hello,
I recently tested a new IPv6 native upstream via pppoe. With
this, I noticed several shortcomings of the current ifupdown
package in this regard.
- As this is my second ppp upstream, I needed to use the
unit pppd option inorder to maintain a relation between the
interface name in /etc/network/interface and the one that was
brought up for real. Somehow this is not statisfying, esp.
when there could be other ppp sessions without a unit keyword,
e.g. when the machine in question also acts as ppp server
- There is no ppp method for inet6. It is only available for
inet. Nevertheless, one ppp link can carry traffic for
different network families, e.g. IPv4, IPV6, IPX,..., and all
these are configured via the same pppd and its option line
- IPv6 over pppd negotiates only link-local addresses. Normally
you would like global IPv6 addresses. These have to be set
manually via an up command, same for routing. Maybe an inet6
ppp method could support address, gateway or route options
additionally.
- As my <cencored> DSL-provider limits me to only one pppoe
session per mac address, I created a virtual ethernet card with
the help of the macvlan device driver. There is no support for
this in the ifupdown package, altough very easy to workaround
to one pre-up and post-down command
For reference, my current /etc/network/interfaces stanza for this
setup looks:
# ipv6 upstream
# ppp over eth0, so eth0 must be there first
# we need another mac address, so make it with a macvlan
# auto ppp1 # when it consider it stable
iface ppp1 inet ppp
pre-up ifconfig eth0 up
pre-up ip link add link eth0 macvlan0 type macvlan
pre-up ifconfig macvlan0 up
up ifconfig ppp1 add 2001:<prefix>::1/64
up route -A inet6 add ::/0 ppp1
provider ipv6-native-dsl-provider
post-down ifconfig macvlan0 down
post-down ip link del link eth0 macvlan0 type macvlan
Bye,
Joerg
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