On Sat, 2011-05-21 at 15:01 +0200, Marc Haber wrote: > Hi, > > with the increasing deployment of IPv6 I begin to see an issue > icreasingly often: When an interface is configured for IPv6, it takes > a few seconds before the IPv6 address actually becomes available. > Services that are started in this time window won't listen on IPv6, > which may be unintended behavior. Many people see this behavior as a > bug in the distribution, which is why I am addressing this issue here > on -devel. > > Unfortunately, it is non-trivial to find out whether my IPv6 > configuration has completed or not. How many addresses will be > assigned to us via stateless autoconfig? Are we running with privacy > extensions? Do we have additional static configuration? > > The most "clean" solutions for this issue would be > (a) Modify the services to notice when additional IP addresses come up > and listen there if the service is configured for that IP address > (b) Parse the configuration of each service in the init script and > wait for the configured IP addresses to actually come up. [...] (c) Set the IP_FREEBIND socket option before binding. Ben. -- Ben Hutchings Once a job is fouled up, anything done to improve it makes it worse.
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