[asterisk-users] What can make G.729a codec hostid change?

[Dave Platt]

> Yes.  Just the lone integrated NIC that's always been there.  NO hardware
> changes.  Still eth0 with the same MAC address.

Do you have any additional, "soft" network interfaces defined?  For
example, have you enabled OpenVPN, and thus loaded either the
"tap" or "tun" network-interface drivers?  Do you have an
IPv6-over-IPv4 tunnel defined (and thus loaded the "sit" driver)?

Note that "ifconfig" will not necessarily show all of your
interfaces (hard- or soft-) - only the active, configured ones.
Take a look at

 	/proc/net/dev

and see if anything shows up, which ought not to.

Also, check the "ifconfig" for each interface, and see if the
HwAddr is exactly what you would expect.  It's conceivable that
your network driver changed, and is (for some reason) reporting a
longer hardware address string (e.g. one padded with zeros).