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Andy Bechtolsheim and Jayshree Ullal discuss Arista Networks and Cloud Computing


Arista 7300 Series Technical Specifications

The Arista 7300X Series modular switches provide industry leading 10/40GbE density and performance. Available as a choice of 16 slot, 8 slot and 4 slot systems they combine wirespeed forwarding with comprehensive L2 and L3 features. The 7300X Series supports a choice of high density wirespeed layer 2/3/4 performance linecards that offer a flexible combination of 1/10/40GbE switching to design large leaf and spine networks for scale-out of east-west traffic patterns with low latency and power efficiency.


Featured Video: 7300 Series Deep Dive


System Performance:

The Arista 7300 systems can be fully populated with up to 16, eight or four linecards respectively






 Half rack of switching that delivers the highest 40GbE capacity in the industry
 An 8 slot system with airflow for server or network rows replacing Catalyst 6509 Compact high density and resilient system with flexible interface choices for leaf / spine and collapsed spline 

Switching Capacity

 40Tbps  20Tbps  10Tbps


 16  8  4

10G Ports 


 1024  512

40G Ports

512 256 128

Forwarding Rate 

  30BPPS  15BPPS   7.5BPPS

Total Buffer

384MB  192MB   96MB

Rack Units

  21  13  8


Linecard Comparison:

7300X Series linecards provide a choice of speed and density addressing 1/10/40 GbE requirements with a consistent set of features. Each module is power efficient and delivers consistent performance and low latency with a dynamically allocated buffer that is optimized for fully meshed East-West traffic patterns.






32 QSFP+

 48 SFP+


48 10G-T


10GbE Interfaces

 128 (QSFP+)


 64 (48-T, 16-X) 

40GbE Interfaces

32 4 4

Port Buffer

24MB  12  12

Nominal Power


Forwarding Rate

  30BPPS  960Mpps  960Mpps


Linecard Features:

Each 7300X Series linecard delivers a consistent set of features supporting layer 2 and layer 3 data center designs with predictable and linear scaling. 


 7300 Linecards


550ns - 2usec (40G)

MAC Table Size

32K to 288K

Maximum IPv4 Host Routes

32K to 288K

Maximum IPv6 Host Routes

16K to 104K

Maximum IPv4 Unicast Route Prefixes

16K to 144K

Maximum IPv6 Unicast Route Prefixes

8K to 77K*

Maximum Multicast Groups

288K with 8K unique groups

Maximum ACL Entries

4-8K Ingress, 1-2K Egress

Maximum LAG Members

Up to 64 member ports

Maximum LAG Groups

Up to 1024

Maximum ECMP Fanout



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