[j-nsp] IP1 vs IP2

[Rafal Szarecki (WA/EPO)]

Hello,

If I remember corectly, it is possible to make RE policing on platform equiped in IP1. But I'm not sure if such function is executed on IP1 or rathe in JUNOS kernel on RE...

The CoS on IP2 is capability to implement Multifield Classifier, so meke QoS classification base on other fields then ToS/DSCP/EXP. This is result of Filtering capability of IP2. On IP1 you have no filtering --> no MF-classifier. Still ToS/DSCP/EXP working on IP1 platform, because this is executed on I/O-manager ASIC. (configured under class-of-service)

Rafał Szarecki JNCIE

skype me <callto://Rafal_Szarecki/> 

 

> -----Original Message-----
> From: juniper-nsp-bounces at puck.nether.net 
> [mailto:juniper-nsp-bounces at puck.nether.net] On Behalf Of 
> Richard A Steenbergen
> Sent: Thursday, January 12, 2006 12:48 AM
> To: Harry Reynolds
> Cc: juniper-nsp at puck.nether.net
> Subject: Re: [j-nsp] IP1 vs IP2
> 
> On Wed, Jan 11, 2006 at 12:04:16PM -0800, Harry Reynolds wrote:
> > I will try.
> > 
> > IP1 can load balance over only 8 paths, IP II supports 16.
> > 
> > IP1 does per prefix, or per-packet. IP II does per prefix 
> (default) or 
> > per flow.
> > 
> > IP1 can do firewalls/policing for RE based traffic only. IP II adds 
> > this capability for transit traffic as well. I honestly 
> cannot recall 
> > if IP1 can do policing for RE traffic; I think it can.
> > 
> > That's all I can think of.  HTHs
> 
> Also, IP1 cards only shipped with 4MB of SSRAM vs the 8MB or 
> higher in all the IP II cards I know of, so you get less 
> capacity to hold routes in the PFE.
> 
> I've seen people keep SSB non-E's around in their M20s as a 
> "cheap backup" 
> so that incase the primary SSB fails the router keeps 
> working, you just lose your filtering etc capabilities.
> 
> Some very anemic pages in need of more content:
> 
> http://www.juniper.cluepon.net/index.php/Internet_Processor
> http://www.juniper.cluepon.net/index.php/Internet_Processor_II
> 
> There is a reference to CoS functionalities in there, but I'm 
> not sure what that is about specifically.
> 
> -- 
> Richard A Steenbergen <ras at e-gerbil.net>       
> http://www.e-gerbil.net/ras
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