30 Dec
2013
30 Dec
'13
4:56 p.m.
On Mon, 2013-12-30 at 16:41 -0500, Bob Tenty spake:
Is interface mtu 0 not discovery off? (as the path mtu
was set to
nopmtudisc)
This is part of the bug.
Maybe setting the interface mtu to a fixed value will
solve your problem.
Setting the ttl to a fixed value did switch path mtu
discovery on
originally but
maybe this new behaviour with interface mtu 0 is causing the problem you
have?
If you have a Pi, please run the full wheezy update/upgrade and you'll
experience what I and others who've emailed me offlist have seen. You
can't "ifconfig <dev> mtu 0", it would be illogical and wouldn't
let you
do such anyway. The issue isn't so much with MTU anyway it's with ttl.
Ip tunnel will NOT allow you to set a ttl to an interface named tunl0
but it will tunl1 or any other tunnel interface.
This does not prevent routing, it only prevents proper traceroutes. Even
leaving MTU = 0, routing still works. It autosenses MTU required and
adjusts per link request. TTL however is another story and you can NOT
adjust it anymore. Prior to the update I could w/o issue.
--
73 de Brian Rogers - N1URO
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