[j-nsp] Core network design for an ISP

Raphael Mazelier raph at futomaki.net
Fri Mar 25 11:28:08 EDT 2016

Le 25/03/2016 16:20, Saku Ytti a écrit :
> On 25 March 2016 at 03:02, Luis Balbinot <luis at luisbalbinot.com> wrote:
>> A good practice on MX480s would be to keep upstream and downstream ports at
>> separate MPCs if possible. Depending on your config the standard 256M
>> RLDRAM from some cards might be an issue in the not so near future. I'm not
>> sure how much RLDRAM those NG cards have though.
> It should be safe for at least 1.5M IPv4 FIB + reasonable IPv6 FIB.
> It's pretty far future, unless you have large L3 MPLS VPN tables in
> addition.
> There are some other benefits running separate MPC for edge and core,
> but it might not make financial sense. Obviously you want core
> interfaces in separate MPCs, so having 3 MPC on smallest pop, and
> potentially just 1 interface in each core MPC, may be just too high
> premium for it.
> I would not specifically plan on separate MPC for edge+core, unless
> I'd knew that I'm going to have large VPN tables and 1.5M won't be
> enough.

What the point to separate upstream and downstream port on different MPC 
? (apart FIB size)

Raphael Mazelier

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