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We have the following rule in our /etc/network/interfaces file:

up route add -net 224.0.0.0/8 dev eth1

If we run route -vne we see it listed:

Kernel IP routing table
Destination     Gateway         Genmask         Flags   MSS Window  irtt Iface
. . .
224.0.0.0       0.0.0.0         255.0.0.0       U         0 0          0 eth1
. . .

Except today we noticed that it was not listed. We rebooted the machine and it appeared again. Can you think of a reason why a routing rule like this would not be honored?

This is a 10.04 machine, FWIW, and we saw no error messages related to eth1 in syslog.

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closed as off-topic by Luis Alvarado Jul 26 at 17:14

This question appears to be off-topic. The users who voted to close gave this specific reason:

  • "This describes a problem that can't be reproduced that seemingly went away on its own or was only relevant to a very specific period of time. It's off-topic as it's unlikely to help future readers." – Luis Alvarado
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