Gentoo Archives: gentoo-dev

From: Peter Johanson <latexer@g.o>
To: gentoo-dev@g.o
Subject: [gentoo-dev] IPv6 support in network initscripts
Date: Sun, 01 Jun 2003 03:27:07
1 hey all,
3 i've started doing a lot of work on IPv6 stuff in gentoo, to try to get
4 us up to snuff with regards to IPv6 support. I've been commiting a lot
5 more ebuilds for various things, and more are to come. BUT, an important
6 aspect needs fixing.
8 init scripts.
10 The problem is we need better control of configuring both the IPv4 and
11 the IPv6 attributes of an interface. Specifically, we want IPv6 services
12 to start if IPv4 networking fails and vice versa.
14 Along with that, we also need some initscript control over establishing
15 tunnels, etc. That issue will be better tackled i think after we have a
16 solid general device configuration in place.
18 Solutions:
19 * Seperate net.ethX and net6.ethX scripts.
20 Problems: When something fails in current net.ethX script,
21 we do 'ifconfig ethX down'. If we do this with co-existing
22 v4+v6, we bring down the other form of networking.
24 Advantages: Lets us have a "provide net" and "provide net6".
25 Other scripts can independantly depend on one or the other, or both,
26 or have "need net \ use net6", etc.
28 More easily allows for IPv6 only networks if in an IPv6 only
29 environment. (example: LAN using 6to4 tools)
31 * Both IPv6 and IPv4 handled by an enhanced net.ethX script
33 Problems: If v4 setup fails, does the script fail completely,
34 or succeed? It can't succeed, because other things that might need
35 v4 will subsequently fail. It can't die, because things that need
36 the format that *didn't* fail will not be started, even though
37 they could have been.
39 Advantages:
40 * Less work to enable a new device. Only have to do
41 "rc-update add net.eth0 default" then configure /etc/conf.d/net
43 * Marginally less time spent running scripts
45 * Other solutions?
47 I really prefer the first method, as it provides much finer grained
48 control. I've got a net6.ethX script mostly done, but i wanted to get
49 some feedback and opinions before fully implementing. The one major
50 sticking point is how to deal with the current "do something or die and
51 bring the interface down" situation. This behavior would obviously have
52 to change.
54 -pete
57 --
58 Peter Johanson
59 <latexer@g.o>


Subject Author
Re: [gentoo-dev] IPv6 support in network initscripts Matt Thrailkill <xwred1@×××××××××.net>
Re: [gentoo-dev] IPv6 support in network initscripts "Robin H.Johnson" <robbat2@g.o>
Re: [gentoo-dev] IPv6 support in network initscripts Dan Armak <danarmak@g.o>