[Bug 54763] Network route table vanishes intermittently

[David Plumpton]

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The route table intermittently loses all routing information, resulting
in "Network unreachable" errors. Normally things work fine, and my ASDL
modem connected via ethernet is problem free. Running the "route"
command gives this:

Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
10.0.0.0        *               255.0.0.0       U     0      0        0 eth0
default         10.1.1.1        0.0.0.0         UG    0      0        0 eth0

But often (say 70% of the time) about 30 seconds after starting Azureus
the route table is empty. All network communications fail, including
pinging my modem. Azureus is not running as root. It should not be able
to clear the route table.

The problem typically remains for one to five minutes, and then
everything starts working by itself. The route table gets its entries
back. On some occasions the problems appear to persist for hours (e.g.
often during overnight downloads). Stopping Azureus always seems to fix
the problem within a minute or so.

Azureus seems to be the only app I can find that triggers this issue.
But clearly it is not a bug in Azureus, since it should not be able to
affect the route table.

The version given by uname -a is:
Linux ubuntu 2.6.15-25-k7 #1 SMP PREEMPT Wed Jun 14 11:43:20 UTC 2006 i686 GNU/Linux

** Affects: linux-source-2.6.15 (Ubuntu)
     Importance: Undecided
     Assignee: Philip Paquette
         Status: Needs Info

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Network route table vanishes intermittently
https://bugs.launchpad.net/bugs/54763