The document provides an overview of Arista's technical forum on hardware and software updates for autumn 2015. It discusses new operational features in EOS 4.15 including a bug portal and transfer of information portal. It also covers how cloud servers and storage are driving adoption of 25GbE and 50GbE to maximize throughput and efficiency. The document summarizes Arista's role in standardizing 25GbE and describes their portfolio of switches that support flexible 25GbE, 50GbE and 100GbE speeds including the new 7320X series.

1. Technical Forum
Hardware and Software Update
Autumn 2015

2. Technical Forum
New Operational Features
§ Bug Portal
• Per release, searchable bug database
• https://www.arista.com/en/support/software-bug-portal
§ EOS 4.15.2FTransfer Of Information (TOI)
• Available on EOS Central – eos.arista.com/toi
§ Notify By Email
• Software advisories, new EOS versions,End-of-LifeAnnouncements

3. Technical Forum
Cloud Servers & Storage Driving 25GbE and 50GbE Adoption
§ Maximize switch and server throughput and efficiency
§ Minimize capex – fewer switch ports and cables
§ Minimize opex – lower power and cooling
§ Minimize cost per bit by utilizing highest speed available
PCIe-Gen1
2Gb/s
4x = 10GbE
PCIe-Gen2
4Gb/s
8x = 40GbE
PCIe-Gen3
8Gb/s
8x = 50GbE
Evolution of PCI ExpressTechnology
PCIe Gen3 drives 25G and 50G

4. Technical Forum
Interface Parallelism
§ Parallelism increases the effective speed of an interface
§ Each interface uses multiple lanes/lasers
• Bit Stripping ensures maximum efficiency
• Increased failure domain
§ Multiplicative CapEX Cost
10G 40G

5. Technical Forum
Evolution of the Network Leaf
64 lanes
1.28Tbps
1/10GbE
2011- 7050 Series
128 lanes
2.56Tbps
10/40GbE
2013 - 7050X Series
128 lanes
6.4Tbps
25/40/100GbE
2015 - 7060X Series

6. Technical Forum
25G & 50G Ethernet Founding Member
Standardizing on 25GbE
§ Faster clock rate increases the effective speed of an
interface
§ Each interface uses a single lane/lasers
10G 25G 50G

7. Technical Forum
Single lanes
maximize usable
connectivity
Single lane 25Gb/s
I/O maximizes port
count and total
bandwidth
Switch Chip limited
by number of I/O
Pins
Switch Chip ports
can run from
10Gb/s to 25Gb/s
Switch Chip I/O is Limited
Port Speed Lane
Speed
(Gb/s)
Lanes /
Port
Usable
Ports
Total BW
10GbE 10 1 128 1280
25GbE 25 1 128 3200
40GbE 10 4 32 1280
50GbE 25 2 64 3200
100GbE 25 4 32 3200

8. Technical Forum
Compute
Advantages of Migrating to 25GbE,50GbE and 100GbE
§ 25GbE uses same copper
or fiber as 10GbE
§ No changes to cable plant
§ 50GbE uses half the lanes
compared to 40GbE
§ 2X more nodes per switch
§ 2.5X performance increase
for every link
§ Better load distribution
and lower latency
10GbE to 25GbE 40GbE to 50GbE 40GbE to 100GbE
2.5X
Higher Server
Bandwidth
100%
More Storage
Nodes
2.5X
Higher Network
Capacity
Storage Leaf - Spine

9. Technical Forum
Fixed Configuration Leaf and Spine Enhancements
64x100G
7260CX-64
IP Storage
128 x 50G
256 x 25G
Q4’15
32x100G
7060CX-32S
100GbE
Flexible
25G/50G/100G
Now
64x40G
7260QX-64
40G Spine
Lower Power
Lower Latency
Now
First products with 25G/50G Support

10. Technical Forum
50Tbps / 38Bpps Switching
256 Ports 100G Line Rate
25G and 50G Support
Extending the Arista 7300X
Arista 7300X
Broad Deployment
Arista 7320X
Cloud Optimized
Flexible Port Configurations
Scalable Throughput
Scalable Packet Processing
Low Latency Single Stage Fabric
Power Efficient
High Availability
Advanced Monitoring and Provisioning
512 40G-QSFP ports
40Tbps / 30Bpps
100G Uplinks
New
Introducing the Arista 7320X

11. Technical Forum
§ QSFP100 enables multiple speed choices
§ 1x100GbE or 40GbE, 4 x 10GbE or 25GbE
and 2 x 50GbE
QSFP100 Ports – Multi-speed combinations
10G/25G Mode
Ethernet 1/1
Ethernet 1/2
Ethernet 1/3
Ethernet 1/4
50G Mode
Ethernet 1/1
Ethernet 1/3
40G/100G Mode
Ethernet 1/1
QSFP100 Interface Configuration Options

12. Technical Forum
Hitless Software Upgrades Sub Second EOS Upgrades with SSU
Flexible L2 and L3 Scale
Dynamic Hitless Speed Change
Flexible Server & Uplink Ports
Buffer Monitoring
Unified ForwardingTable with 5 flexible modes
Eliminate downtime in configuring speed changes
10G to 100G on a single QSFP100 interface
Latency Analyzer with configurable thresholds
CloudVision Workload Orchestration and Workflow Automation
EOS Advantages

13. Technical Forum
All Software is Not Equal – Dynamic Hitless Speed Change
Arista(config)#show interfaces et29/1 status
Port Name Status Vlan Duplex Speed
Et29/1 disabled 1 full 40G
Arista(config)#interface et29/1
Arista(config-if-Et29/1)#no speed forced 40gfull
Arista(config-if-Et29/1)#show interfaces et29/1-4 status
Port Name Status Vlan Duplex Speed
Et29/1 disabled 1 full 10G
Et29/2 disabled 1 full 10G
Et29/3 disabled 1 full 10G
Et29/4 disabled 1 full 10G
Only EOS has
Dynamic Hitless Speed Change

14. Technical Forum
EOS - Hardened for
Cosmic Radiation
§ All products tested under Neutron beam
§ Parity errors detected and corrected
§ No grey failures (black-holing of traffic)
§ EOS does not rely on Broadcom SDK
§ Highest Resiliency in Cloud Deployments
§ Problem will only get worse with 28 &16
nm

15. Technical Forum
Smart System Upgrade Leaf – Hitless Upgrade
SSU Hitless Upgrade
§ Designed to provide simple,low risk upgrade options,for fixed configuration systems and single connected servers
§ Key feature for critical applications where maintenance windows are impossible to schedule
§ During reload,Data Plane remains fully operational and acts as a proxy for Control Plane
§ Traffic loss during an SSU Hitless Upgrade is unnoticeable to applications
5+ Minutes
Application
Loss Report
200ms
Application
Loss Report
Existing Approaches SSU Hitless Upgrade
✓✗

16. Technical Forum
Smart System Upgrade – Maintenance Mode
SSU MAINTENANCE MODE
§ Leverages a network centric approach to upgrades
§ Simple, standards based, low risk upgrades in highly redundant networks
§ Remove device from data-path before starting operations to remove risk
§ ECMP approach hides this removal from applications
Graceful RemovalPre-Upgrade Seamless Insertion

17. Technical Forum
Automation and Visibility across the Universal Cloud Network
CloudVision – 100GbE, 50GbE and 25GbE
7010T 7050X 7150S 7060X 7280E
7500E 7320X
Comprehensive Features
Spine/Leaf
Cloud Ready,VXLAN,
Programmable, Open, SDN
Investment Protection
Common EOS Binary
Power Efficient
Low Latency,Wire speed
7048T
Workload
Orchestration
Workflow
Automation

18. Technical Forum
ThankYou