[c-nsp] ASR9001 Vs ASR1006

[Adam Vitkovsky]

> Gert Doering
> Sent: Tuesday, May 17, 2016 8:05 PM
>
> Hi,
>
> On Tue, May 17, 2016 at 03:01:41PM -0400, Satish Patel wrote:
> > ASR9001 doesn't have hardware redundancy then why people going to buy
> it?
>
> Because it is fast, reasonably cheap, does not each much electricity, and you
> can just put a second one next to it?
>
> Hardware redundancy is totaly overvalued - our 6500s could all run dual-
> SUPs, and except for the layer2 things, *none* have dual-SUPs - because for
> a L3 scenario, just putting a second box next to it, running a different IOS
> train (!) will give you much better resiliency than "dual SUPs, same operating
> system, crashing together", or "dual SUPs, something dies in a weird way
> blocking backplane traffic"...
>
> Now, for a customer edge box, terminating 10.000s of customers, I can see
> that you want dual-RSP and all that - plus reasonable reboot-free software
> upgrades, so maybe not ASR9k either...
>
That's actually a good point.
From what I know 10K customers (VPN not subs) on a single box would be way too many eggs in one basket (doesn't matter the box is fully redundant).
So yeah it can so happen that you'd have big 10 slot chassis which is half empty cause business won't allow you to terminate more customers on a single box.
And also it's a question of RSP resources as well -like you might run out of BGP sessions before you'll run out of ports or LCs
So yeah I guess more of smaller boxes not necesarly 2RU non redundant but just not 10 or 22 slots might be the right way forward.


adam








        Adam Vitkovsky
        IP Engineer

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