apologies if this is a reallly basic question (and it's one I definitely should know but seem to be having a mental block on!).
If I have a 2600-series router with an ADSL WIC and I want a reliable failover/backup service for TCP-based alerts (mostly either HTTP or SNMP trap) if the PSTN fails, can I use a serial module-connected service? The bandwidth will be far lower, and at this stage it might be GPRS modem or possibly an X.25 service - can the serial ports be configured to do "dial on demand" using an external modem?
I am not sure if you can configure a failover based on HTTP or SNMP traps, TMBK, object tracking comes closest, it allows you to define other values than purely the state of the interface as a trigger for failover:
I probably didnt explain clearly enough - it doesn't really matter if the router can "understand" the messages (whether HTTP or SNMP), just that they get through - so if the interface that is the ADSL WIC is down or faulted, the router uses the serial interface. It would be great to be able to insert a little more intelligence though so thanks very much for the Enhanced Object Tracking link.
This is actually a pretty cool feature, i didn't even know it existed until I was looking for a solution to advertise a subnet (prefix in BGP talk), only if a certain condition existed. This is exactly what conditional advertisements does
j ai une question j ai achete un routeur cisco 887VA-k9 , je le configuré avec la configuration ci- dessous
si je le lier avec mon pc portable sur l un de ses ports directement ça marche toute est bien ( la connexion internet + m...
Attached policy provides CLI access to the Cisco 4G router over text messaging. Two files are in the attached .tar file:
2. PDF with instructions on how to load and use the .tcl file.