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...@nanog.org> On > Behalf Of Brandon Butterworth > Sent: October 15, 2024 01:37 > To: Kevin Shymkiw <kshym...@gmail.com>; Alex Buie <ab...@cytracom.com> > Cc: nanog@nanog.org > Subject: Re: arista full tables recommendation > > > On 15/10/2024 03:27:49, "Kevin Shymkiw" <kshym...@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" <bran...@bogons.net> > To "Alex Buie" <ab...@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 >
