Hello all, We have several installations of embedded wireless routers (running slack on a 2.4 kernel) in which the gateway router_1 uses a Verizon 3G USB modem (ppp0) as its connection to the outside world, and one or more downstream router_2 have 5.8Ghz wireless links to router_1, and thus route traffic to the outside world through the same ppp0 3G connection.
Verizon has a habit of constantly changing the ppp0 IP address often sometime several time per hour. I would like to figure out a way that the downstream router_2 can be made aware of that ppp0 address change at router_1 within a minute or two of it happening. The obvious way seemed to be running a cronjob traceroute from the router_2 to a known outside IP, with a limit of two of three hops, and grepping the first public IP and looking for the change. However, for some reason that shows the Verizon gateway router on their tower as the first public IP rather that the locally assigned ppp0 public IP address. Any suggestions for how to determine that ppp0 IP using standard tools and pref. without writing e.g. inter-router communications scripts etc. would be welcome. verizon_tower------------------[3G_modem(ppp0)]-[router_1]---------------[5.8Ghz_link]----------------[router_2] Thanks, Tom S. _______________________________________________ PLUG mailing list PLUG@lists.pdxlinux.org http://lists.pdxlinux.org/mailman/listinfo/plug
