When the hosts on 172.23.8.4/22 try communicate with the host 172.23.11.5/24, they will first send out an ARP request for 172.23.11.5. Since the 172.23.11.5 host is on the same subnet, it will respond with its MAC address. The router will disregard the ARP since it belongs to one of the same subnets that has been configured on that ethernet interface. When the 172.23.11.5 host tries to communicate with 172.23.8.4 it will not send out an ARP since it knows the the address is on a different subnet. Therefore, it will send the packet to the router at 172.23.11.1. The router will see a destination of 172.23.8.4 and the only route for that is through 172.23.8.0/22 therefore it will ARP for 172.23.8.4's MAC address and transmit the packet without any problems.
As to your second question, when the host 172.23.2.6 wants to communicate with 172.23.11.4, the router will pick the most specific route for 172.23.11.4 (routers always route based on the most specific match). The most specific match for 172.23.11.4 is within 172.23.11.0/24 so it will be routed correctly.
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.