I'm having strange network problems. When I bring eth0 up with ifconfig eth0 x.y.z.1 netmask 255.255.255.240 up everything works as it should: I can ping my own IP and the only other machine in the same network (x.y.z.14). When I try to add the other machine as default gateway with route add default gw x.y.z.14 everything breaks down: I can't even ping my own IP. To be precise I can ping the gateway, the replies just don't get back to ping in any reasonable time. tcpdump shows that the packets actually do get out and I can even see the replies with tcpdump -ni eth0 but they don't seem get any further than that. If I wait long enough the first packet comes back to ping after 74 seconds and the next ones after that each 74 seconds after the previous one. The same behaviour occurs with three different machines all running 2.2.16 kernel (RedHat 6.2/7.0 stock) with different NICs (eepro100 and 3c59x). All the machines work fine in another network x.y.z'.0/24. Removing the default gateway restores the normal functionality for the network x.y.z.0/28, but other traffic is obviously impossible. Antti - : send the line "unsubscribe linux-net" in the body of a message to majordomo@vger.kernel.org
