Flash memory and SDRAM size for cisco 12816 router PRP-2
I want to choose a flash memory and a SDRAM for a cisco 12816 router PRP-2 that used in core of a network that has extensive load but i can't find any document that recommend a size for it. Also the router has about 10*10Ge, 6*STM64 and other interfaces.
Re: Flash memory and SDRAM size for cisco 12816 router PRP-2
on a GSR 128016 the duty of PRP-2 is to mantain all routing protocols information including adjacencies and to build the CEF table and to keep in sync its copy of the CEF table with the CEF table copy that is in each linecard
(this is CEF distributed)
So the memory of the CPU has to be big enough to host all routing protocols processes, the IP routing table, the ARP table and the CEF table.
If you have a linecard with 10GE ports and 512MB of RAM I would expect PRP to have at least 1GB of RAM just to be sure it has enough RAM.
However, if you know that your router will never handle an high number of routes (and you need to count also MPLS L3 VPN and other MPLS services) you can use a PRP-2 with standard memory that probably is 1GB.
For the flash the minimum requirement is to able to host the IOS image to be loaded at startup so probably a 64 MB is enough.
A bigger flash like the one I have on this 12410 can allow to host multiple versions of IOS (each one is roughly 23-24 MB with 12.0(32)SY) and to have space to host a core dump in case of crash.
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.