Aside from the row 0 showing you no changes if all below it are zero, it also means how long the ip profile has been enabled. The reason why prefix refresh value is one less is because there were 4 changes within an interval for one prefix as you can see on row 4 where there is a value of 1 under prefex refresh. You add that to 5 will equate to that with no change. This is the same when you look at the table again after you add the 172.30.0.0 subnet.
It's not actually 4 changes after you added the subnet back but 3. You see it 4 because it had a value of 1 previously. If you look at the routing table, it will add the subnets 172.30.0.0, 172.30.10.0 and 172.30.20.0.
Here is a definition of the fields for your reference:
Forward-Path Change - This statistic is the number of changes in the forwarding path, which is the accumulation of prefix-add, next-hop change, and pathcount change statistics.
Prefix-Add - A new prefix was added to the routing table.
Next-Hop Change - A prefix is not added or removed, but the next hop changes. This statistic is only seen with recursive routes that are installed in the routing table.
Pathcount Change - The number of paths in the routing table has changed. This statistic is the result of an increase in the number of paths for an Interior Gateway Protocol (IGP) prefix in the routing table.
Prefix Refresh - Standard routing table maintenance; the forwarding behavior is not changed.
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.