There shouldn't be a problem with running more than or less than 25 routers in the backbone area. Some of the things to keep in mind however are link stability in the backbone area and summarization. A really good practice is to have your routes summarized before they enter the backbone area, therefore changes in the topology in external areas will not impact your entire domain. Another thing to remember is that E1/E2 type routes cannot be summarized. Your backbone is merely a pass through for other areas. The more stable your links are, the less spf will have to be calculated. Some other factors to keep in mind are CPU and memory requirements. A good book to have is OSPF Network Design Solutions by Thomas. Chapter 5 outlines the suggested routers per area and CPU/memory requirement guidelines to follow. From my experience, these can vary greatly depending on how your network is layed out.
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.