[Pkg-utopia-maintainers] Bug#418023: Interfaces managed by NetworkManager have MTU 576

[Michel Dänzer]

Package: network-manager
Version: 0.6.4-7
Severity: important


I noticed that all interfaces managed by NetworkManager seem to
have an MTU of 576 bytes (the minimum). This seems to have a negative
effect on download speed, or certainly not a positive one. As
nm_system_get_mtu() in src/backends/NetworkManagerDebian.c returns 0,
NetworkManager doesn't seem to set the MTU explicitly though, so I'm not
sure where the default is coming from. I verified that hacking the above
function to return 1500 results in interfaces managed by NetworkManager
having an MTU of 1500, with a line like

Apr  6 12:18:52 thor NetworkManager: <information>^ISetting MTU of
interface 'sungem' to 1500

in syslog.


--- System information. ---
Architecture: powerpc
Kernel:       Linux 2.6.21-rc5

Debian Release: lenny/sid
  500 unstable        mirror.switch.ch 
  500 stable          security.debian.org 
  102 experimental    ftp.ch.debian.org 

--- Package information. ---
Depends                 (Version) | Installed
=================================-+-=============
libc6                (>= 2.3.5-1) | 2.3.6.ds1-13
libdbus-1-3             (>= 0.94) | 1.0.2-1
libdbus-glib-1-2        (>= 0.73) | 0.73-1
libgcrypt11            (>= 1.2.2) | 1.2.3-2
libglib2.0-0          (>= 2.12.9) | 2.12.11-1
libgpg-error0            (>= 1.4) | 1.4-2
libhal1                  (>= 0.5) | 0.5.8.1-9
libiw28                   (>= 28) | 28-1
libnl1-pre6                       | 1.0~pre6-4
libnm-util0                       | 0.6.4-7
iproute                           | 20061002-4
iputils-arping                    | 3:20020927-6
dhcdbd                (>= 1.12-2) | 2.0-3
lsb-base               (>= 2.0-6) | 3.1-23.1
wpasupplicant          (>= 0.4.8) | 0.6.0~cvs20070224-1
dbus                    (>= 0.60) | 1.0.2-1
hal                  (>= 0.5.7.1) | 0.5.8.1-9
ifupdown                          | 0.6.8
adduser                           | 3.102

-- 
Earthling Michel Dänzer           |          http://tungstengraphics.com
Libre software enthusiast         |          Debian, X and DRI developer