[j-nsp] 32-Bit JunOS on the 64-Bit Routing Engines

[Hannes Viertel]

Hi Keegan,

i cannot confirm the 250M routes. What has been tested are 21m bgp v4 Prefixes in a simple "load it up" test.

Basically the imminent scaling improvements on this type of RE come from the change of the memory maps ( kernel can grow beyond 1 gb, and process memory is now upto 3 gb with a maximum deamon size of 2gb ).


hope that helps

/hannes

Am 25.08.2011 um 01:52 schrieb Keegan Holley:

> 
> 
> As Robert pointed out,  32/64 bit use the same codebase and at the current point in time only the kernel is enabled to handle the additional memory.  Therefore some of the memory maps/footprints changed slightly. No other daemons have moved to 64bit.
> 
> They are saying that the new 16G RE's can handle 250M routes.  How is this possible if none of the daemons are 64bit?   
> 
> 
> 
> 
> 
> 
> >
> >
> > ------ Weitergeleitete Nachricht
> > Von: Thomas Eichhorn <te at te3networks.de>
> > Datum: Wed, 24 Aug 2011 13:27:14 +0100
> > An: Keegan Holley <keegan.holley at sungard.com>
> > Cc: <juniper-nsp at puck.nether.net>
> > Betreff: Re: [j-nsp] 32-Bit JunOS on the 64-Bit Routing Engines
> >
> > Yeah, that is clear - my original point is:
> >
> > I do not trust the 64bit software - I have more faith in the 32bit software.
> >
> > As per now, it has equal cost to order an MX960 with 32b-4G-RE or
> > 64b-16G-RE.
> >
> > So of course I would order the bigger RE but only if I can use the
> > the matured software...
> >
> > Tom
> >
> >
> > Am 24.08.2011 14:19, schrieb Keegan Holley:
> > > Interestingly enough my SE told us this is possible at lease on our Mx480 and MX960 boxes. Our lab boxes are otherwise engaged at the moment so we havent tested. One note regarding general computing though.  The processor can only address 4G (3.8 or so actually) of ram with a 32 bit word size.  So even if you get the re's running the 32 bit code they will only register 4G of the precious 16G.
> > >
> > > Sent from my iPhone
> > >
> > > On Aug 24, 2011, at 3:12 AM, Thomas Eichhorn<te at te3networks.de>  wrote:
> > >
> > >> Hi all,
> > >>
> > >> I just discussed the following with my SE:
> > >>
> > >> I wanted to get new 64Bit REs with some new gear,
> > >> but run the 32-Bit JunOS on them - he denied that
> > >> this is possible.
> > >>
> > >> I tried to research that, but have not yet found
> > >> something in the docs - does anybody here have some clue
> > >> about that?
> > >>
> > >> As the REs are 'only' standard PCs, I do not see any reason
> > >> for them to be not capable of running 'legacy' 32Bit JunOS.
> > >>
> > >> I would be really glad if someone has some clue about that and
> > >> could unearth the truth.
> > >>
> > >> Thanks,
> > >> Tom
> > >> _______________________________________________
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> > >> https://puck.nether.net/mailman/listinfo/juniper-nsp
> > >>
> >
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> >
> > ------ Ende der weitergeleiteten Nachricht
> 
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