[j-nsp] System board memory expansion on M7i

[Chris Kawchuk]

Hi Rubens,

JunOS 9.0+ will require > 256MB of RAM on the routing engines to load
properly. JunOS 9.0 is expected to be released in Q1 2008. 

Notes from the Juniper PSN:
---
PSN Issue: The RE-400-256 Routing Engine contains only 256MB of main
memory. Beginning with JUNOS release 9.0, this is insufficient to run
JUNOS software; the minimum supported main memory configuration for
JUNOS 9.0 and above is 768MB.

Solution 1: The RE-400-256 Routing Engine is replaced with the
RE-400-768. This new Routing Engine model includes 768MB of main memory,
which meets the new minimum requirement.

Solution 2: Implementation Customers with RE-400-256 Routing Engines are
strongly urged to upgrade those Routing Engines to RE-400-768 before
installing JUNOS release 9.0 or higher. This upgrade is accomplished by
installing two MEM-RE-256-S memory upgrade modules.
---

Hence, you will need to upgrade your RE-400's to 768 Mb of RAM on a
go-forward basis in order to load the newer JunOS images starting in
2008. On a side note, I *always* suggest loading any router with the
maximum amount of memory, since the Global Internet routing table isn't
getting any smaller.... =)

- Chris.

____________________________________
Chris Kawchuk (ckawchuk at juniper.net)
Systems Engineering, Service Providers
Juniper Networks Inc., Canada
local:     +1 (403) 470-8174
toll-free: +1 (866) 470-8174


-----Original Message-----
From: juniper-nsp-bounces at puck.nether.net
[mailto:juniper-nsp-bounces at puck.nether.net] On Behalf Of Rubens Kuhl
Jr.
Sent: Thursday, November 01, 2007 9:27 AM
To: juniper-nsp at puck.nether.net
Subject: [j-nsp] System board memory expansion on M7i

Hi.

M7i routers can be ordered with 256 or 512 MB RAM system board memory;
any guidelines on what usage scenarios would make 512MB desirable or
even mandatory ?

Our need is a Internet router with 3 full-routing transit feeds and a
bunch of peering connections that made us specify more memory for the
routing engine, but that may or may not impact forwarding engine
requirements. AS and J-Flow are already included in the RFP.


Rubens
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