Arista Layer3

joel jaeggli joelja at bogus.com
Thu Nov 30 23:16:41 CST 2017


On 11/30/17 13:00, Ken Chase wrote:
>   >Arista DCS-7280SRA-48C6 is a 1ru box.??
>   >
>   >Has a nominally million route fib, Jericho+ 8GB of packet buffer.
>   >control-plane is 8GB of ram andAMD GX-424CC SOC which is 4 core 2.4ghz.
>   >We do direct fib injection with bird rather than the arista bgpd but the
>   >control-plane is capable of managing quite a few bgp sessions.
>   >
>   >the 1/2ru 7280CR2K-30 and 60 are 2m route fib boxes with still heftier
>   >control planes but they're a different class of box being all 100G and
>   >requiring multi-chip/internal fabrics.
>
> Sounds pretty good - hows your power draw on that thing? Why'd you pick Bird
> in this case?
this a standard sr that's moderately busy but not exactly slammed, I'm
be impressed if you could triple that at full tilt.

#show environment power
Power                                  Input    Output   Output
Supply  Model                Capacity  Current  Current  Power    Status
------- -------------------- --------- -------- -------- --------
-------------
1       PWR-500AC-R               500W    0.35A    5.27A    62.8W Ok
2       PWR-500AC-R               500W    0.32A    4.81A    56.4W Ok
Total   --                       1000W       --       --   119.1W --

bird had memory footprint going with it as well as some local
modification and we hacked addpath into it a few years ago. filtering
poilcy is something we programmatically generate and interact with via
agents so a traditional style monolithic config isn't that useful.


> /kc
>
>
>   >> /kc
>   >>
>   >> On Thu, Nov 30, 2017 at 10:45:09AM -0800, Tyler Conrad said:
>   >>   >For Enterprise/DC, it works great. For service provider, they're not 100%
>   >>   >yet. The main issue is going to be around VRFs, as there's no interaction
>   >>   >between them (at least in the code version I'm on, that may have changed
>   >>   >recently or be changing soon). They'll work great as a P-Router, but if you
>   >>   >need a PE with route leaking I'd look at another vendor.
>   >>   >
>   >>   >I use a couple pairs of 7280SRs as edge routers/border leaves. Multiple
>   >>   >full table feeds without any issue.
>   >>   >
>   >>   >On Thu, Nov 30, 2017 at 10:36 AM, Romeo Czumbil <Romeo.Czumbil at tierpoint.com
>   >>   >> wrote:
>   >>   >
>   >>   >> So I've been using Arista as layer2 for quite some time, and I'm pretty
>   >>   >> happy with them.
>   >>   >> Kicking the idea around to turn on some Layer3 features but I've been
>   >>   >> hearing some negative feedback.
>   >>   >> The people that I did hear negative feedback don't use Arista themselves.
>   >>   >> (they just heard....)
>   >>   >>
>   >>   >> So do we have any Arista L3 people out here that can share some negatives
>   >>   >> or positives?
>   >>   >>
>   >>   >> Use case: Just some MPLS IPv4/IPv6 routing, l2vpn OSPF/BGP
>   >>   >> Maybe 20k routes (no full internet routes)
>   >>   >> 7050 Series
>   >>   >> 7280 Series
>   >>   >>
>   >>   >> -Romeo
>   >>   >>
>   >>
>   >
>   >
>
>
>
>


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