[j-nsp] J Series - BGP Peering Router?

[Truman Boyes]

Hey Paul,


For what you want to do, you would be fine with a J-series. BGP instances means the number of BGP processes you would run inside additional routing-instances (ie. instance-type virtual-router, etc). If you are basically doing all your routing from inet.0, then you have essentially one BGP instance with multiple peers. I don't think the BGP peers on J-series is hard coded but rather the value that systest has qualified. 

As per Richard's comments, he is absolutely correct; you don't want to do millions of paths on J-series; but for a small number of routes you are working with, the box would work fine. As for performance, you would also be fine to push 200Mbps IMIX on the router. 

I suspect you may also want to disable the flow mode (aka, running in packet mode) if you run a newer software release on the J's. 

Kind regards,
Truman



On 22/04/2010, at 4:07 PM, Paul Stewart wrote:

> Thanks very much for the feedback.. I've received a few offline replies as
> well.
> 
> To clarify the "small nature" of this application - we would be sending
> about 65 iBGP routes to the box and receiving about 4000 eBGP routes.  It's
> for a small peering pop/exchange point.
> 
> Having said that, if I thought it would work we'd take some J6350's and dump
> some much larger tables for 600-800Mb/s applications involving about 20k
> routes or even maybe full tables depending on the application.... the
> feedback has been "mixed" so far to say the least ;)
> 
> Travelling at the moment but going to fire up this handy J2320 I have laying
> around and dump a full table to it ... like to flap it a few times etc. and
> see what happens with 10.x loaded on it.
> 
> Richard, I've heard you mention the rib/fib installation bug a few times but
> never seen it yet (we're slowly entering the Juniper world from Cisco).  Is
> there anything documented on this issue or more details we can look up
> somewhere?
> 
> Best regards,
> 
> Paul
> 
> 
> -----Original Message-----
> From: Richard A Steenbergen [mailto:ras at e-gerbil.net] 
> Sent: April-22-10 3:28 PM
> To: Paul Stewart
> Cc: juniper-nsp at puck.nether.net
> Subject: Re: [j-nsp] J Series - BGP Peering Router?
> 
> On Thu, Apr 22, 2010 at 12:30:30PM -0400, Paul Stewart wrote:
>> Hi there..
>> 
>> I have a couple of applications pop up recently where I think a
>> J-Series might suffice for BGP peering.  The application is a small
>> peering POP doing about 200Mb/s of traffic, about 50 BGP peers, and
>> total routes is roughly 4000 total.
> 
> In our experience w/J-series running the old/regular JUNOS (can't speak
> to JUNOS-ES, which is really more of an integration of security features
> to make J-series a mini-SRX), this would probably be a bad idea (I'm
> assuming you mean more than 4000 routes, since you mention 400k later in
> the email). We evaluated J-series for use as route reflectors, and found
> that they suffer GREATLY from the ye olde slow rib/fib installation bug. 
> What might take a few minutes to install under extraordinary conditions
> like coming up from a fresh restart on M/T/MX could take 30 minutes to
> in some cases HOURS to install on J-series. When I asked Juniper people
> about it, they basically said "we don't really support/recommend
> J-series for this application, and the software is heavily optimized 
> towards providing packet forwarding performance at the expense of bgp 
> performance". Of course they said that AFTER we spent money on those 
> stupid route reflector software licenses, which they continue to sell 
> even though the box is completely unusable as a route reflector. :)
> 
> YMMV but on J-series running JUNOS as of 9.3R4 the only words I can use
> to describe loading up a lot of bgp routes/neighbors is "epic disaster". 
> Maybe JUNOS-ES is better or different or something, I dunno.
> 
> -- 
> Richard A Steenbergen <ras at e-gerbil.net>       http://www.e-gerbil.net/ras
> GPG Key ID: 0xF8B12CBC (7535 7F59 8204 ED1F CC1C 53AF 4C41 5ECA F8B1 2CBC)
> 
> 
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