As some of you may have noted I am working on a Bering configuration with a main
external interface at eth0 of a DSL router and an additional external connection
consisting of an external modem for redundant failover.
I have had no problem getting the modem to work and it looks like the firewall portion
may not be too bad (knock on wood!) but I can’t seem to get past the existing
defaultroute.
How does one change the defaultroute on the fly? I have my pppd setup configured to
set the ppp connection as the defaultroute.
pppd logs the following message:
"not replacing existing default route to eth0"
The only other negative sounding message is the following:
"Cannot determine Ethernet address for proxy ARP"
I also experimented with settings in the interfaces config file in the "ppp0"
interface section. The default is
auto ppp0
iface ppp0 inet ppp
provider provider
I changed this to :
auto ppp0
iface ppp0 inet ppp
Address xxx.xxx.xxx.xxx
Masklen 27
Gateway xxx.xxx.xxx.xxx
I’m not sure this is appropriate but I could not find further documentation on this
file to indicate whether I can use these settings with a ppp interface, and even if I
can, that it is appropriate.
I also added a local:remote entry to the ppp options file and tried the -ip setting to
force the use of these settings but the ppp connection was dropped with a message from
the ISP to the effect of "No network protocol running".
Any ideas?
I’m also working on a script to monitor the DSL connection and bring up the modem
connection if it is determined as down. When the DSL connection was restored for a
given period of time then the modem would be disconnected. This setup also depends on
a secondary MX record pointing to the static ip for the modem connection so mail will
still get through.
I am definitely working to set this up in the most ideal manor as It seems like this
configuration would be useful to contribute.
Richard
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