[173645] in North American Network Operators' Group
Re: Upgrade Path Options from 6500 SUP720-3BXL for Edge Routing
daemon@ATHENA.MIT.EDU (Mark Tinka)
Wed Jul 30 05:18:57 2014
X-Original-To: nanog@nanog.org
From: Mark Tinka <mark.tinka@seacom.mu>
To: Vincent Bernat <bernat@luffy.cx>
Date: Wed, 30 Jul 2014 11:18:43 +0200
In-Reply-To: <m3silji50z.fsf@neo.luffy.cx>
Cc: nanog@nanog.org
Reply-To: mark.tinka@seacom.mu
Errors-To: nanog-bounces@nanog.org
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On Wednesday, July 30, 2014 11:12:44 AM Vincent Bernat=20
wrote:
> What's the point of shipping more memory then? Maybe the
> OS can only address 4GB per process but is able to use
> up to 64GB in total (PAE)?
That was one argument from Cisco - that when the software=20
catches up, they might be able to compartmentalize so that=20
applications gain access to it individually. I didn't grill=20
them too much on this, as we use IOS XR in the core mostly=20
(CRS), and we don't need RAM too much since IPv4 is switched=20
on MPLS labels, negating the need to hold a full IPv4 table=20
on the routers.
That said, I can see a use-case where the additional RAM on=20
the CRS and ASR9000 can make sense if IOS XR is allowed to=20
run separate VM's on the same control plane. I know that iso=20
one of the ideas behind the NCS, but not sure whether it=20
will be added to the CRS and ASR9000.
Mark.
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