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Though Arista Networks is a relative newcomer in the data center and cloud networking markets, the company has already had considerable success. In this book, renowned consultant and technical author Gary Donahue (Network Warrior) provides an in-depth, objective guide to Arista’s lineup of hardware, and explains why its network switches and Extensible Operating System (EOS) are so effective.
Anyone with a CCNA or equivalent knowledge will benefit from this book, especially entrenched administrators, engineers, or architects tasked with building an Arista network. Is Arista right for your data center? Pick up this guide and find out.
Topic highlights include:
- SysDB: the EOS system database that holds state, statuses, and variables
- Multichassis Link Aggregation (MLAG): for linking a port-channel to multiple switches instead of just one
- Latency Analyzer (LANZ): the interface-buffer troubleshooting tool with a reporting granularity of one millisecond
- VM Tracer: for adding, changing, and removing VLANs without human interaction
- Zero-Touch Provisioning (ZTP): for remote switch configuration
- Hardware advantages: including merchant silicon, low-latency networking, and power consumption
- Gotchas: issues with Arista switches or systems
- Sales Rank: #1018690 in Books
- Brand: Donahue, Gary A.
- Published on: 2012-10-27
- Released on: 2012-10-24
- Original language: English
- Number of items: 1
- Dimensions: 9.19" h x .90" w x 7.00" l, 1.48 pounds
- Binding: Paperback
- 422 pages
- Used Book in Good Condition
About the Author
Gary A. Donahue is a working consultant who has been in the computer industry for 28 years. Gary has worked as a programmer, mainframe administrator, Technical Assistance Center engineer, network administrator, network designer, and consultant. Gary has worked as the Director of Network Infrastructure for a national consulting company and has been the president of his own New Jersey consulting company; GAD Technologies.
Most helpful customer reviews
4 of 4 people found the following review helpful.
The Missing Manual
By Eric Chou
I have been working with Arista switches for a while now, this is the manual that should have came with the switches. As the author mentioned, the EOS command syntax is very similar to Cisco IOS. In fact, I have heard of stories where engineers simply copy and paste IOS configuration into EOS during migration and it worked just fine. However, to tap into the capabilities that makes Arista a game-changer one has to get into the realms of SystemDB, Python, Linux user space, etc. Anybody can type commands, but the real challenge lies within the impact and scope of what the commands do. This book does a good job of covering the practical stuff that you can use in your day-to-day, as well as the concepts behind them.
Overall, I would recommend this as a solid investment of money and time for anybody looking into Arista switches.
Pro:
- Real world examples.
- Solid explanation of concepts.
- Sense of humor for an otherwise dry subjects.
Notes, suggestions, erratas:
1. Maybe more coverage into the current fat tree design with spine/leaf/core, etc. This is one area that Arista differs from competitor for the number of ECMP next-hop, tcam division of host routes, etc.
2. Power draw is critically important in large scale data centers, Arista has some good innovation in this area with PHY-less design.
*** Virtual Machines on Arista ***
1. If you don't have an Arista switch handy to practice, or just want a safe environment to practice with, you can run vEOS off a VM: vEOS, [...] by Andre Pech.
2. When you are in a pinch, you can also run another VM direction in EOS: Running Virtual Machines in EOS, [...] virtual-machines-in-eos/ by Mark Berly.
*** sFlow ***
The whole chapter on sFlow probably warrants more coverage. This is one important telemetry tool that offers lots of information and the right direction going forward, IMO. It offers the ability to do push telemetry vs. pull such as SNMP that offers more scalability.
It is also important in the sense of data center billing for the counter. If you are, say, Yahoo and have one of the biggest Hadoop cluster. You would want to know who is your top talker so you can bill them the network overhead accordingly. This is typically done with NetFlow that exports to collector (more on it in a bit), but if you have a network of Arista switches that does not cross the core, sFlow counter is your current best bet.
Because aggregation is done in the onboard flow cache 'before' it sends to collector, NetFlow often falls down in even moderate amount of traffic in data centers. You are forced to scale down on the flow sampling rate that increases the error delta. sFlow on the other hand, just samples and push all the intelligence into the collector.
The author hints at this, but here is an early peak on troubleshooting data plan traffic with sflowtools:
1. Running the open source sflowtools directly on Arista switches for troubleshooting data plan traffic that does not cross CPU. [...]
*** Python ***
Python should have more coverage in the book as that is what Arista CLI is built on. Just some pointers toward motivated Network Engineers which modules to look more into and the location of the files would be helpful.
1. I have asked when Python 3 will be included in Arista, best guess is when Fedora updates their OS to make 3 default.
*** Random Notes about the book ***
1. I think 'sh run all interface' was in 4.7.x, then for some reason went away in 4.8.x, then came back after 4.9.x.
2. I wish the book covers more on the SysDB mount points that Mark Barley points out on EOS Central.
3. IPv6 chapter in the works with 4.10.x code?
4. Nice tip about generating traffic at 'ping -s 15000 -c 10000 10.10.10.15 > /dev/null &' I have done that before but couldn't see the traffic right away and killed it.
5. Why woundn't cron work on Arista (chapter 23)?
6. Nice tips: didn't know that tcpdump can be executed directly from EOS, files other than selected few locations do not survive reloads, emails, etc.
7. ZTP chapter: chapter typo, should be EOS 4.7 and after, not 3.7.
8. ZTP chapter: instead of identifying by mac address, should identify via relay agent or the place of kingdom (show lldl) via script instead of by mac address. The mac address change due to RMA, typo. Also manually mocking DHCP config file does not scale.
9. Event-Handler chapter: More event-handler trigger is indeed needed in Arista in order for the feature to be more useful.
10. Event-Handler chapter: tJust like regular bash script, you can 'demonize' and chain the commands with ';'.
22. Event-handler chapter: There is at least one bug in event-handler in 4.8.3 that configuring 'on boot-up' triggers the event-handler right away. Be careful if the startup script include anything that is production impacting.
23. I like the 'advance usage of sqlite' a lot, gives me some ideas for using sqlite for other features as well. Maybe show the Python integration with sqlite for script purposes?
27. I like what the author pointed out the different between the default flash: location vs. having to specify full Unix path via file: command. I wish I had known this, would've saved me a some time copying stuff from /var/log -> /mnt/flash -> transfer.
28. CloudVision: I wouldn't recommend the use of XMPP in production either. Use the upcoming JSon API instead.
29. Page 360, pretty sure that 'spline' is a typo for 'spine'.
30. Here is a talk by Andy Bechtolsheim in NANOG 55, helps to understand Arista's vision: [...]
*** Commands that I wish the book included ***
1. favorite command: 'show interface counters rates | nz'
2. switch(s1)#sh logging last ?
Number of time units (sec|min|hr|day)
2 of 2 people found the following review helpful.
Brilliant
By David J. Humphries
I very recently joined Arista in Australia and due to all sorts of reasons, I have to wait several months to do the new hire training.
No problem - I simply bought this book (kindle version) and it has helped me out considerably. I am now recommending this book to any technical person who is the slightest bit interested in Arista or Data Centre Networking.
I love the laconic style and the real world examples of how to make day to day operations so easy compared to what we have been used to.
Great book !
2 of 2 people found the following review helpful.
Entertaining and informing read
By cameron sturgess
Arista warrior gives great view to all of us who are familiar with Cisco and wondered what it would be like to use some different hardware but more importantly some software other than IOS. It answers the questions what's in it for me and not only why should I consider Arista but how I can use their gear better.
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