[c-nsp] PE "Sprawl" - P/Core Router suggestions.

[Tim Durack]

NCS-5501 has additional off-chip buffer (~50ms at 100G)
NCS-5001 has on-chip buffer only

On Thu, Dec 29, 2016 at 9:23 AM Stephen Fulton <sf at lists.esoteric.ca> wrote:

> I have not used the 5501 but I've been told to be mindful of the buffers
> on it, specifically when shifting from higher to lower bps ports.
> That's SOP for switches, less usual for devices sold as routers though
> (the ME3600 & ASR920 come to mind).
>
> -- Stephen
>
>
>
> On 2016-12-29 9:19 AM, Phil Bedard wrote:
> > What kind of protocols are you running on the network?  What’s the
> likelihood of running some user services or more advanced features on the
> new “core” boxes?   Cisco gear the NCS 5501 would probably be my choice,
> it’s substantially less expensive than the 5502 if you don’t need the 100G
> density or still need to support 1G.  The low scale version of the box
> would probably fit your needs fine, and they’ve made enhancements in 6.1.2
> where the low scale versions can fit an Internet table now if need be.   On
> the lower end that’s a bit tougher but the price point on the 5501 may be
> low enough it makes sense to use it everywhere.
> >
> > Phil
> > -----Original Message-----
> > From: cisco-nsp <cisco-nsp-bounces at puck.nether.net> on behalf of
> CiscoNSP List <CiscoNSP_list at hotmail.com>
> > Date: Tuesday, December 27, 2016 at 23:04
> > To: "cisco-nsp at puck.nether.net" <cisco-nsp at puck.nether.net>
> > Subject: [c-nsp] PE "Sprawl" - P/Core Router suggestions.
> >
> >     Hi Everyone (Apologies in advance for the long post :) )
> >
> >
> >     We have multiple POPs, of varying sizes, no true "core"....due to
> size initially(# of customer tails @ POPs), collapsed design was used to
> reduce capex/improve ROI.
> >
> >
> >     Hardware currently used are ME3600's/ASR920's/ASR1Ks(LNS/Transit),
> and TOR switches 4900's, Nex3Ks
> >
> >
> >     Primary service offering is L3VPN, and as we aggregate with a large
> number of carriers, customers can pick/choose tails to suit
> budget/bandwidth/sla's etc
> >
> >
> >     Interpop connections are currently going into our ASR920's, and as
> they have a limited # of 10G ports(4), we are having to add more ASR920's,
> purely for 10G...not ideal, not scaleable, and increasingly difficult to
> manage.
> >
> >
> >     So, looking to put a more modular(Hierarchical two-layer - "core"
> and "aggregation" ) design in place, that is easily
> replicable/templated/flexible.
> >
> >
> >     Hardware (Cisco house) - Ive looked at so far:
> >
> >
> >     ASR9001 for our larger POPs, but 10G port density on them is an
> issue...4 onboard, and they only support the 4 port 10G MPAs(2 line card
> slots, so 2 of these)....so total 12 x 10G?
> >     ASR1K - I see they have released the 1001/2-HX with the 1002 having
> an EPA slot - So, 8 x 10G onboard, and with an EPA 10x10G a total of 18 x
> 10G ports - but as these are very very new, Im guessing very pricey?
> >     NCS - Very new, and know very little about them - NCS5001/NCS5002 -
> 10G port density definitely not an issue(40 + 80)...but they are an "MPLS
> agg router"...So, potentially an option if we went BGP-free "core"?
> >     Then we have the bigger "chassis" brothers of the ASR9K/1K and
> NCS...all being a lot more $, and taking up a lot more real-estate in the
> Rack..
> >
> >     ASR9001 - "looked" like an ideal candidate, but the limited number
> of 10G ports is an issue
> >     ASR1K - 1002-HX - Looks fantastic, but I would imagine very big $ if
> fully populated with 10G ports
> >     NCS - Unsure on these as they are very new, and docs on them are a
> little sparse...i.e. Could they be an option, if we went BGP-free in the
> core?
> >     Other Options?
> >
> >
> >     Then for our smaller pops (that have 2-4 ASR920's(PEs) - Core/Agg
> box for these is quite a challenge...we would still need something with
> 10x10G ports to give us scale(PEs) and also for Interpop....any suggestions
> here would be greatly appreciated :)
> >
> >
> >     For our "larger" POPs, where we will see 6+ (ASR920's) PEs - Dual
> 10G connectivity to the 2 Core/Agg routers will quickly burn lots of ports
> (As well as the needed Interpop connections) - Are mini PE "rings" an
> option...i.e. maybe 4 x ASR920's, east-west connected, with just 2 having
> 10G to the core/Agg?
> >
> >
> >     Appreciate any suggestions/comments/recommendations  - Cheers
> >
> >
> >     _______________________________________________
> >     cisco-nsp mailing list  cisco-nsp at puck.nether.net
> >     https://puck.nether.net/mailman/listinfo/cisco-nsp
> >     archive at http://puck.nether.net/pipermail/cisco-nsp/
> >
> >
> >
> > _______________________________________________
> > cisco-nsp mailing list  cisco-nsp at puck.nether.net
> > https://puck.nether.net/mailman/listinfo/cisco-nsp
> > archive at http://puck.nether.net/pipermail/cisco-nsp/
> >
> _______________________________________________
> cisco-nsp mailing list  cisco-nsp at puck.nether.net
> https://puck.nether.net/mailman/listinfo/cisco-nsp
> archive at http://puck.nether.net/pipermail/cisco-nsp/