Public bug reported:
My system contains several client pcs accessing an NFS server. The pc
with problems was running 6.10 on the same hardware configuration prior
to upgrading to 7.04. No problems with 6.10.
I clean-installed ubuntu 7.04 from the alternate cd and copied the
/etc/network/interfaces (with an MTU of 4096) from my 6.10 installation.
Using an MTU of 4096 I got random hangs when accesing NFS mounts on the
server. The problem was "simple": NFS worked for a *short* period of
time and then crashed. After crashing the only way I could get any NFS
shares working was to reboot.
When I removed the MTU setting, the problem went away.
auto eth0
iface eth0 inet static
address 192.168.1.4
netmask 255.255.255.0
network 192.168.1.0
broadcast 192.168.1.255
gateway 192.168.1.1
# mtu 4096
lspci snippet:
01:09.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8169 Gigabit
Ethernet (rev 10)
** Affects: Ubuntu
Importance: Undecided
Status: Unconfirmed
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MTU size causes hangs with NFS, probable RTL-8169 NIC driver issue
https://bugs.launchpad.net/bugs/115101
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