In the book Routing TCP/IP Volume 1 by Jeff Doyle,he has mentioned in the second chapter that RIP & BGP although they are routing protocols they work at the application layer.Why? If so where do OSPF ,EIGRP and IGRP work in the OSI layers ?
I suppose you could argue that a routing protocol is an application that runs on top of the network, OSPF, EIGRP, IS-IS, RIP, and BGP included. In a sense, they are, because they rely on connectivity provided by the network to move infomation--BGP is probably the most reliant, and probably comes closest to the application layer.
On the other hand, I would classify routing protocols as operating at layer 3, even though they are applications that operate at layer 3, because they provide the information required to make the layer 3 and above parts of the network actually work.
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.