(usagi-users 03523) Re: Mobility: HA hangs after MN comes home

> Hi all,
Greets!

> While testing IPv6 mobility we bumped into the following issue on the 
> Home Agent node.
> 
*snip*
> - But, when the MN comes back on the home network, the following message
> is printed on the HA console:
> 
> "unregister_netdevice: waiting for ip6tnl1 to become free. Usage count=169."
*snip*

Alright, I've seen this issues far too many times.

I've encountered it *many* times setting up TRT gateways, ethertap VPNs, and, indeed, SIT tunnels.

Although these are all IPv6 applications in how I have applied them, I have a hunch that this isn't specifically an IPv6 related issue, even though I can't tell you where the problem actually is.

In my case, I'm lucky, since my implementations are effectively static, and I can work around the issue by simply not destroying protocol tunnels.

So it seems in the end I can't give you a specific solution, but I can tell you it's not just mip6.

I hope it helps you in the search for a solution!

Daniel





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