Hi all, We're an arista shop (primarily 7050qx-32s, 7050tx, and 7060cx right now) and wanted to get some input on recommendations for "real routers" that can better handle full internet tables. As it is right now we do some creative import filtering to import and inject a handful of routes we care about due to limited fib space and otherwise just use a default received from our carriers, with any particular transit carrier being the "primary" at a given time and using pingcheck <https://github.com/arista-eosext/PingCheck> to influence that decision. We'd like to move towards consuming full tables (or at the very least, customer routes) from each of our ISPs - would be grateful for any pointers or recommendations in arista models or family of devices that would be good core/peering routers, especially other than the latest generation. We'd be landing 10g optics from the carriers currently and peering to the downstream switches at 40G or 100G. (frequently we are in the used equipment space for our acquisitions so previous generation or two or three tends to land us in a pretty good spot). thanks in advance for any advice you can provide! Alex
Alex, For that kind scale products in the 7280R3 family with the extra memory (K) SKU’s would be the best fit. If you need chassis then it would be the 7800R3 chassis products. This of course assumes new units and not buying resale products. Kevin On Mon, Oct 14, 2024 at 19:40 Alex Buie <abuie@cytracom.com> wrote:
Hi all,
We're an arista shop (primarily 7050qx-32s, 7050tx, and 7060cx right now) and wanted to get some input on recommendations for "real routers" that can better handle full internet tables. As it is right now we do some creative import filtering to import and inject a handful of routes we care about due to limited fib space and otherwise just use a default received from our carriers, with any particular transit carrier being the "primary" at a given time and using pingcheck <https://github.com/arista-eosext/PingCheck> to influence that decision.
We'd like to move towards consuming full tables (or at the very least, customer routes) from each of our ISPs - would be grateful for any pointers or recommendations in arista models or family of devices that would be good core/peering routers, especially other than the latest generation. We'd be landing 10g optics from the carriers currently and peering to the downstream switches at 40G or 100G. (frequently we are in the used equipment space for our acquisitions so previous generation or two or three tends to land us in a pretty good spot).
thanks in advance for any advice you can provide!
Alex
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-Architect... 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
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
participants (4)
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Adam Thompson -
Alex Buie -
Brandon Butterworth -
Kevin Shymkiw