ICMP: Destination unreachable (Protocol unreachable) from OSPF multicast
I have an IBM mainframe ("are they still mainframes?") that is generating an OSPF multicast. It receives a response "ICMP: Destination unreachable (Protocol unreachable)" for each OSPF multicast packet generated. The response comes back with a source address of 192.168.1.1 (this address does not exist in my network). The mainframe is interfacing with my Cisco network which is fully OSPF operational and communicating with the mainframe without issue. But, this "unreachable" message is filling up the system logs. What can be causing this error message? Thanks.
Re: ICMP: Destination unreachable (Protocol unreachable) from OS
Is there any indicator in the error message about what interface it was received on? I am wondering if the mainframe has some interface it is sending OSPF on that might not be connected to your router network. I believe that the protocol unreachable is consistent with receiving the OSPF packet on an interface that is not running OSPF. Since that address given is not in your network and since your network devices are running OSPF, it leads me to wonder if there is some interface connected to something else that might be generating these.
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.