tom at snnap
Mar 2, 2012, 3:07 PM
Post #3 of 3
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Hi Doug,
Thanks for the reply. You are correct, each logical system gets its
own rpd process.
I managed to get access to an M7i and indeed you can do 15 LS's on
them. Each rpd process only takes a couple of MB RAM, and seem to be
quite light on CPU (barely even registers) so it looks promising for
an RE-400 with only a couple of hundred MB of RAM even.
Still need to test with a few more features, so this might impact on
RAM and CPU. We'll see over the next couple of days as I play around
some more.
Hopefully this information is helpful for someone else. :-)
Tom
On 1 March 2012 05:37, Doug Hanks <dhanks [at] juniper> wrote:
> 15. Should be fine for personal use. It really just spawns another
> instance of rpd.
>
> Thank you,
>
> --
> Doug Hanks - JNCIE-ENT #213, JNCIE-SP #875
> Sr. Systems Engineer
> Juniper Networks
>
>
>
> On 2/29/12 9:51 AM, "Tom Storey" <tom [at] snnap> wrote:
>
>>Hi everyone.
>>
>>Can anyone provide any pointers for the maximum number of logical
>>systems one could expect to run on an M7i?
>>
>>As I understand it, each logical system has its own batch of processes
>>running on the RE, so I am assuming the number is going to be some
>>function of how much RAM you have on it.
>>
>>I am looking at using an M7i or two in a lab, with not very large
>>tables (basically just the topology of the lab itself), but want to
>>maximise the number of logical routers I can run to allow for
>>vast/complex topologies. Ideally I would be able to run 20 logical
>>systems.
>>
>>There are quite a few M7i's floating around on ebay with RE-400-768's,
>>or even RE-400-256's (though RAM should be quite easy to upgrade.) The
>>maximum number of logical systems per box is supposed to be 15, but
>>with a RE-400-768, that gives roughly 50mb of RAM to each one,
>>excluding the overhead for the system itself. How much RAM is required
>>to run one? Can an RE-400 expand past 768mb?
>>
>>RE-850-1536 would give about double the RAM for each logical system
>>and Im sure a decent boost in responsiveness due to faster CPU, but
>>are about as rare as hens teeth with a price to match.
>>
>>Price is a big constraint since this will be for personal use, so
>>while I know the MX80 is a nice box, it is out of my reach
>>financially. :-)
>>
>>Thanks,
>>Tom
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>
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