[ovs-discuss] Running into MTU problem (2 extra bytes)

[Johnson L. Wu]

Not OVS for sure!! 

I tried a control experiment:  Debian  7.8, OVS 2.3.3

# cat /etc/debian_version 
7.8
root at labeled3sb1:/home/data/pcap/20150626# ovs-vsctl --version
ovs-vsctl (Open vSwitch) 2.3.3
Compiled Jun 26 2015 16:52:46
DB Schema 7.6.2
root at labeled3sb1:/home/data/pcap/20150626# uname -r
3.2.0-4-amd64
root at labeled3sb1:/home/data/pcap/20150626#

ifconfig | grep MTU shows all 1500
No errors in dmesg at all.

The VM behind the OVS is happy as a clam, no timeouts no need for MTU adjustments.

Sorry for the trouble and thanks for all the help Jesse.

Emil I think it may be prudent to reinstall on a 7.8 and not let apt-get upgrade or update get in the way and see.

Cheers,

-Johnson

-----Original Message-----
From: Jesse Gross [mailto:jesse at nicira.com] 
Sent: Thursday, June 25, 2015 4:18 PM
To: Johnson L. Wu
Cc: Emil Flink; discuss at openvswitch.org
Subject: Re: [ovs-discuss] Running into MTU problem (2 extra bytes)

On Wed, Jun 24, 2015 at 7:37 PM, Johnson L. Wu <johnson at snoopy.org> wrote:
> Tried configuring 2.4 by hand
>
> root at jwu-lenovo:/usr/local/src/trunk/ShadowBox/Deploy/apps# ovs-vsctl 
> --version ovs-vsctl (Open vSwitch) 2.4.90 Compiled Jun 24 2015 
> 19:16:45 DB Schema 7.12.1 
> root at jwu-lenovo:/usr/local/src/trunk/ShadowBox/Deploy/apps# uname -r
> 3.16.0-4-amd64
> root at jwu-lenovo:/usr/local/src/trunk/ShadowBox/Deploy/apps#
>
>
> ./configure --prefix=/usr --localstatedir=/var 
> --with-linux=/lib/modules/`uname -r`/build  make; make install;  make 
> modules_install; sudo depmod -a
>
> and its still the same, 2 bytes off.
>
> Will update if I see anything else.  Thanks!

OK, thanks. I guess it seems somewhat unlikely to be related to OVS at this point, although I don't have a good theory as to what would cause this. Let us know if you find anything more.