Re: Brocade SLX Internet Edge

[Chris Welti <chris.welti () switch ch>]

Nicolas Fevrier has a very detailed blog post on how Cisco handles the prefixes on their Broadcom Jericho based NCS 
5500 gear.
https://xrdocs.io/cloud-scale-networking/tutorials/2017-08-03-understanding-ncs5500-resources-s01e02/

I'm pretty sure the principle is more or less the same for the Jericho based platforms on Arista and Extreme.

Best regards,
Chris

On 01.11.18 15:31, Saku Ytti wrote:
> Hey,
>
> They all do in principle the same thing. There are memories for
> longest path lookup and memories for exact lookup. I believe the trick
> is to put specific prefix size, like /24 to exact lookup table,
> relieving the LPM table stress greatly. Then in parallel ask both, and
> take more specific result.
>
> There are variation to this, like having multiple separate exact match
> tables, and populating each with different prefix size, and so forth.
>
> Juniper on PTX is doing something quite different, they are asking
> on-chip bloom filter about hint on where to query, reducing query
> count they need to do towards high latency off-chip memory.
>
> MX is doing yet something different, having JNPR proprietary memory
> ASIC (no longer plain (RL)DRAM).
>
> ASR9k is still just TCAM (for all ezchip generations, unsure about lightspeed).
> On Thu, 1 Nov 2018 at 15:26, Colton Conor <colton.conor () gmail com> wrote:
> > I think Extreme is doing the same thing with their Extreme OptiScale™ that Arista is doing with their Arista 
> > FlexRoute™ and EOS NetDB™. They are both using Broadcom Jericho /Qurman with extenal TCAM, but still has a hardware 
> > limitiation on route table size. Then in software they filer right?
> >
> > Question is who has a better solution Arista or Extreme for this?
> >
> > Also, the question is can any whitebox vendors do the same thing, with the same Broadcom switch you can buy for 
> > around $9k new.
> >
> > Another question, could you even consider these with the Juniper MX204 coming in at $20k?
> >
> >
> >
> > On Thu, Nov 1, 2018 at 8:04 AM Kevin Burke <kburke () burlingtontelecom com> wrote:
> > > Thanks for everyone who responded on and off list.
> > >
> > >
> > >
> > > As a small company that is happy to still be in business the pricing is too good to ignore.  A “gently used” 
> > > ASR-9006 is something like $45k for one plus a shelf spare.  A brand new SLX 9540 is something like $30k for one 
> > > plus a shelf spare.
> > >
> > >
> > >
> > > There were some common things.  Software is behind where we would like.  The occasional bug like that SSH one.  
> > > Also there are some relatively common features like IPv6 outbound ACL and BGP MED that aren’t there.  This stuff 
> > > isn't a showstopper but I will take this a sign of things to come.
> > >
> > >
> > >
> > > As for the notes about full tables.  Different vendors seem to have used different techniques to get past the hard 
> > > FIB limit that we are all used to.  I had the same question when pawing through the spec sheets.  So I asked the 
> > > sales rep:
> > >
> > >
> > >
> > > “We can support 1.5M routes…..
> > >
> > >
> > >
> > > These platforms support all of the requirements detailed above for Internet routing. In particular, they support a 
> > > table size of 1.5 million IP routes today, ensuring headroom for the next 5-7 years. This scale is made possible 
> > > through our new technology called Extreme OptiScale™ for Internet Routing that optimizes programmable hardware and 
> > > software capabilities to accelerate innovation and deliver investment protection.
> > >
> > >
> > >
> > > https://www.extremenetworks.com/extreme-networks-blog/internet-routing-in-the-enterprise/”
> > >
> > >
> > >
> > >
> > >
> > > Kevin Burke
> > >
> > > 802-540-0979
> > >
> > > Burlington Telecom - City of Burlington
> > >
> > > 200 Church St, Burlington, VT 05401
> > >
> > > -----Original Message-----
> > > From: NANOG <nanog-bounces () nanog org> On Behalf Of Kevin Burke
> > > Sent: Wednesday, October 31, 2018 4:02 PM
> > > To: nanog () nanog org
> > > Subject: Brocade SLX Internet Edge
> > >
> > >
> > >
> > > Does anyone have any success with the Brocade SLX 9540 or similar?  Its going to be taking full BGP tables from two 
> > > Tier1's and some peering.
> > >
> > >
> > >
> > > The specs and sales rep says its fine, but the price makes me think its too good to be true.
> > >
> > >
> > >
> > > We are trying to shepherd an old Cat 6509 out of our core.
> > >
> > >
> > >
> > >
> > >
> > > Kevin Burke
> > >
> > > 802-540-0979
> > >
> > > Burlington Telecom - City of Burlington
> > >
> > > 200 Church St, Burlington, VT 05401