A static route is really neither classful or classless. What is classful or classless is how you do the routing lookup. For example lets assume that we have 3 static routes:
ip route 10.0.0.0 255.0.0.0 22.214.171.124
ip route 172.16.2.0 255.255.255.0 126.96.36.199
ip route 0.0.0.0 0.0.0.0 188.8.131.52
So we have a route for a class A network, for a class B subnet, and a default route.
The static routes describe classful masks but really are neither classful or classless. That becomes an issue when we do a lookup in the routing table. If a packet comes into the router with destination address 172.16.4.5 what should the router do? It has a route for a subnet in class B 172.16.0.0 but does not have a route for this particular subnet. If ip classless is enabled then the router will forward the packet using the default route. If no ip classless is configured (classful behavior) then the router discards the packet as unroutable.
That is the difference between classful and classless. It is in the routing table lookup not in the static route (or dynamic route).
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.