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Old 10-01-2016, 07:00 PM   #1
n1uro
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ip tunnel issues


Thanks for reading this.

I'm trying to change the settings of my ipencap tunnel (tunl0) and it used to work but since the latest upgrades of raspbian wheezy (RPI 1B) I don't know if this is a bug or what. I need to change the ttl from any to 64. The line I've always used is:
root@gw:/# ip tunnel add tunl0 mode ipip ttl 64 pmtudisc

Now it returns the following:

add tunnel tunl0 failed: No buffer space available

Ip tunnel shows:
tunl0: ip/ip remote any local any ttl inherit nopmtudisc

So it is there. I don't have an issue on my wheezy laptop. If it's a memory issue that'd be weird as I can add tunnels if i rename them tunl1, tunl2, etc.
With it as is, it does work however traceroute and other tools don't quite work properly... and this is what I'm trying to resolve. This is a point to multipoint tunnel.

Input is appreciated.

Last edited by n1uro; 10-01-2016 at 07:29 PM.
 
Old 10-03-2016, 03:51 PM   #2
nini09
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Based on error output, it complain that configuration on remote side, such as no path discovery.
 
Old 10-03-2016, 04:37 PM   #3
n1uro
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Quote:
Originally Posted by nini09 View Post
Based on error output, it complain that configuration on remote side, such as no path discovery.
It wouldn't since this is a point to multipoint mesh network.
I'm beginning to think this may be a bug in Raspbian Wheezy as on my Debian PC it works flawlessly.

Last edited by n1uro; 10-03-2016 at 06:11 PM.
 
Old 10-04-2016, 01:27 AM   #4
Jjanel
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Maybe some ?base-OS? config changed from upgrade...

Look for it (list all) *before* you add it! Delete then retry add...

Here's a couple of ['*wild*-guess'] ideas:

https://bugs.debian.org/cgi-bin/bugr...cgi?bug=508450
"always existing" tunnel interface that gets added as soon as you load the
module. (ie. sit0 for sit, tunl0 for ipip, ...)

http://askubuntu.com/questions/10970...er-space-error
delete the half-configured tunnel before trying again.
 
1 members found this post helpful.
Old 10-04-2016, 08:48 AM   #5
n1uro
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Quote:
Originally Posted by Jjanel View Post
Maybe some ?base-OS? config changed from upgrade...

Look for it (list all) *before* you add it! Delete then retry add...

Here's a couple of ['*wild*-guess'] ideas:

https://bugs.debian.org/cgi-bin/bugr...cgi?bug=508450
"always existing" tunnel interface that gets added as soon as you load the
module. (ie. sit0 for sit, tunl0 for ipip, ...)

http://askubuntu.com/questions/10970...er-space-error
delete the half-configured tunnel before trying again.
Considering those bugs are several YEARS old, I wanted to insure that wasn't the case because it was working. I do have a backup prior to discovering the failures which I didn't want to restore and lose some of my previous work but I was left no choice. After a restore it appears to work fine again so this is definitely a bug in raspbian kernel 3.10.x. Upgrading to 3.12.22 fixed this issue and I am now able to set my TTL to 64 as I need it to be. Hopefully this will help others.

Thanks.

Last edited by n1uro; 10-04-2016 at 07:28 PM.
 
  


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