How does a router or switch decide which processes to give precedence to? For example, if a router is facing a DoS attack (or whatever reason) and because of that, its CPU is pegged, how will it decide whether to process a BGP Hello or to policy-switch a data packet with a QoS marking of EF?
In fact, even during normal operatrion, how are the processes prioritized?
I don't think I have ever read a document that addressed this...
Victor, of course only Cisco can answer your question, but I suspect often the design is there is no inherent priorization for, or between, many processes. The expectation appears to be there will normally be excess CPU capacity so don't bog down the design with unnecessary logic. Confirmation of this might be seen by how badly many Cisco devices perform if you drive the CPU to 100% and keep it there. (BTW: if this is the design, nothing at all wrong with it for a special device such as a router or switch.)
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.