Because of an acquisition, I must be able to SNMP poll two devices with the same IP address (10.1.1.1). See diagram below:
Polled station A Polled station B
Router E Router F
Router B Router C
Polling station A Polling station B
(polling 10.1.1.1) (polling 10.1.1.1)
I do not control the configuration or routing of router B, C or D. Therefore to avoid routing loops, I have chosen to establish GRE tunnels from the 55 networks on router A to router E and F. The paths are as follows:
Primary link to polled station A(GRE tunnel1): 220.127.116.11 -> router B -> router D -> router E
Secondary link to polled station A(GRE tunnel2): 18.104.22.168 -> router B -> router C -> router E
Primary link to polled station B(GRE tunnel3): 22.214.171.124 -> router C -> router D -> router F
At router A, because I have two destination IPs of 10.1.1.1, I must use policy-based routing to direct the traffic to the right tunnel interface based on the source IP address.
Here is the problem I have: There are two paths to polled station A (GRE tunnel 1 and GRE tunnel 2). How do I set policy-based routing to forward the packet to the secondary path if the primary path has failed? In theory I could use the command "set ip next-hop verify-availability" but it requires CDP to be running on the interface which isn't supported on tunnel interfaces.
You can list multiple IP addresses in a single "set ip next-hop" command. If the first is unreachable, the router tries the second, and so on. As far as I know, "unreachable" in this case refers to the outbound interface being down.
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.