In past few years, some people were working on developing algorithms and schemes to reducing power consumption of network device. I'm wondering, whether any of the proposed schemes has been realized on any cisco routers/switches?
If it does, can anyone tell me where to find the document about how long it will take a router(e.g., edge router of an AS) to wake up a sleeping line cards? Does it took milliseconds or microseconds?
Yes, routers usually cannot sleep. However, since not all components work all the time, it's not necessary to keep all parts of the router fully worked. For example, some people propose to put some router line cards to sleep if it didn't receive any packets for an time interval; and re-active the line card if new packets are received. Another scheme is to put line cards to sleep and buffer the receving packet till certain amount and then awake the router and transimit the packets.
I'm interested in the time needed to awake a sleeping line card.
having a linecard go to sleep doesn't make much sense since even a few milliseconds may cause problems with time-sensitive data. Buffering data until a certain amount is received makes even less sense, that will only increase load on the total network (TCP retransmits).
There may be a scenario such as scheduled sleep times in small corporate LAN environments that might work, but for serviceproviders and enterprises it would not be useful.
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.