I have run into a very peculiar problem.
I have installed Fedora Core 3  on
an Athlon64 System (MSI K8Neo Platinum
motherboard and an AMD64-3000 cpu).
This system has an onboard Gigabit
ethernet which is identified by the kernel
and operates correctly.
I installed the latest asterisk for use as
a SIP only server / gateway. There
are 5 cisco 7940 IP Phones
and codec g729 is used, and a
cisco router 3640 is used as a gateway
to the pbx via its isdn bri voice lines.

One of the problems is that when i
try to call a line to the pbx, the
network on the linux machines stops
almost completely. In the logs
(message and dmesg) there are entries
NETDEV WATCHDOG: eth0 timeout
after a minute the network is restored.
This happens only when a place a call
to pass thru asterisk to the pbx via the
cisco gateway. Also if i put the
ethernet in promiscuous mode, it does
not hangup. I have not run into a behavior
like this one before with 32bit systems
(Intel / AMD). Is it a problem of X86_64
or with the onboard ethernet controller?
Why it is done only with asterisk? For
example FTP works ok with heavy load...

Any help will be highly appreciated.

Savas Pavlidis


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