RE: arista full tables recommendation

[Adam Thompson <athompson () merlin mb ca>]

We're running 7280SR2K (no -M) and they're capable of handling 3xDFZ + 1xGREN + iBGP + VXLAN in RIB and FIB.  We are 
using FlexCompression or whatever Arista calls their FIB optimization thing.
Other models may require the high-memory option, but the 7280SR2K already comes with it.  (So do the newer 7280SR3, no 
-K or -M needed.)
-Adam

Adam Thompson
Consultant, Infrastructure Services
MERLIN
100 - 135 Innovation Drive 
Winnipeg, MB R3T 6A8 
(204) 977-6824 or 1-800-430-6404 (MB only) 
https://www.merlin.mb.ca 
Chat with me on Teams 

> -----Original Message-----
> From: NANOG <nanog-bounces+athompson=merlin.mb.ca () nanog org> On
> Behalf Of Brandon Butterworth
> Sent: October 15, 2024 01:37
> To: Kevin Shymkiw <kshymkiw () gmail com>; Alex Buie <abuie () cytracom com>
> Cc: nanog () nanog org
> Subject: Re: arista full tables recommendation
>
>
> On 15/10/2024 03:27:49, "Kevin Shymkiw" <kshymkiw () gmail com> wrote:
> > For that kind scale products in the 7280R3 family with the extra memory (K)
> SKU’s would be the best fit.
>
> K is extra TCAM, the extra ram, M option, may be needed too.
>
> I missed the list off my previous reply (updated) -
>
> ------ Forwarded Message ------
> From "Brandon Butterworth" <brandon () bogons net>
> To "Alex Buie" <abuie () cytracom com>
> Date 14/10/2024 23:01:25
> Subject Re: arista full tables recommendation
> I you have money get 7280CR3K model for lots of 100G ports,
> 7280SR3K if you need mostly 10/25G ports. The non K are smaller
> TCAM, data is on Arista web site. Other models if you need
> 400G.
>
> https://www.arista.com/assets/data/pdf/Whitepapers/7280R3-Platform-
> Architecture-WP.pdf
>
> If you need to get used/cheaper then R2 is previous gen and good
> for about 1.3M, cheaper is the early R generation for up to 1M ish.
>
> On all of them you can use flex route to increase capacity, they
> do the hard work of deciding what to include in the fib compression,
> it is a licensed feature though so it may be cheaper to buy a bigger
> model before needing to use it.
>
> We do 2 full tables into R's with flex with plenty of slack.
>
> We, being small/cheap, are using used 7280QR which is older
> 40G/100G, has plenty of ports (better than an mx204) we use QSA
> adaptors when we need 1G or 10G ports, burns a 40G slot but there
> are plenty, if we need more we'd use 4*10G break out cables to
> get four times as many. They were hard to get new or used when
> we switched, global supply issues have eased since then. R are
> at end of support so you may want more recent.
>
> brandon