network problem

[Johan Arens <johan.arens@gmail.com>]

Hi Guys 

I got a strange problem with my qube2. 

I use it to connect 2 different networks, the final goal is to do a firewall with it. 

The problem is, if I start a large transfert from the network connected
to eth1 to the network under eth0, all the connections to and from eth0
are becoming extremly slow : ping with more than 500.000 ms, impossible
any more to open a connection with ssh,...

However, if I do a reset of the network, with /etc/init.d/network restart, the interface become normal again. 

I've found this in syslog :  kernel: NETDEV WATCHDOG: eth0: transmit timed out

My kernel is  2.4.27-r5k-cobalt.
My interface options file contains this : 

ip_forward=yes
spoofprotect=yes
syncookies=no

My interface file contains this : 

auto eth0
#iface eth0 inet dhcp
iface eth0 inet static
        address 192.168.0.150
        netmask 255.255.255.0
        dns-search somedomain
        dns-name-servers 192.168.0.150

auto eth1
iface eth1 inet static
        address 192.168.1.2
        netmask 255.255.255.0
        gateway 192.168.1.1
        dns-search somedomain
        dns-name-servers 192.168.1.2


Any clue where the problem might be ? 

Thanks in advance 

Johan