6 Apr
2014
6 Apr
'14
3:26 p.m.
To all Raspberry Pi users,
I found myself exactly at the same point as Brian N1URO,
but "I came from a bit different direction".
After upgrading kernel from 3.6.11+ to 3.10.25+
I lost all possible connectivity based on tunl0 interface,
and experienced very strange responses to pings.
I spare my quite long research "journey"...
At last I realized that! MTU:0 directed me to check
ax25 startup scripts. I had such line:
ifconfig tunl0 44.165.2.2 netmask 255.255.255.240 multicast arp up
First glance and observation: I DO NOT HAVE MTU defined!!!
In fact it was not defined anywhere else before or after this line.
Changed line to:
ifconfig tunl0 44.165.2.2 netmask 255.255.255.240 mtu 1500 multicast arp up
From now on, EVERYTHING works PERFECTLY!
Sorry for inclusion from previous message,
but it seems necessary at this point.
Best regards.
Tom - sp2lob
On 30/12/13 00:59, Brian Rogers wrote:
Greetings;
I've noticed recently after doing a package update on the iproute
packages I can no longer configure my tunnel interface tunl0. Mainly I'm
trying to reset the ttl to 64 for traceroute to properly work.
Everything I've searched comes up empty. Here's what I see:
root@gw:/usr/local/bin# iptunnel show
tunl0: ip/ip remote any local any ttl inherit nopmtudisc
root@gw:/usr/local/bin# ifconfig tunl0
tunl0 Link encap:IPIP Tunnel HWaddr
inet addr:44.88.0.1 Mask:255.255.255.255
UP RUNNING NOARP MULTICAST MTU:0 Metric:1
ttl is stuck on inherit and MTU autoconfigs to 0. This I know is set by
nopmtudisc however if I try to adjust things:
root@gw:/usr/local/bin# ip tunnel change tunl0 ttl 64
ttl != 0 and noptmudisc are incompatible
root@gw:/usr/local/bin# ip tunnel change pmtudisc mode ipip
add tunnel tunl0 failed: No such file or directory
Why would it try to ADD? the command is CHANGE.
Has anyone else suffered this before and if so what was the fix?
Thanks in advance.