content: <?xml version="1.0" encoding="UTF-8"?><edgarSubmission xmlns="http://www.sec.gov/edgar/ownership" xmlns:com="http://www.sec.gov/edgar/common">
    <!-- Generated by Workiva -->
    <headerData>
      <submissionType>144</submissionType>
      <filerInfo>
        <filer>
          <filerCredentials>
            <cik>0001494211</cik>
            <ccc>XXXXXXXX</ccc>
          </filerCredentials>
        </filer>
        <liveTestFlag>LIVE</liveTestFlag>
  
  
  
      </filerInfo>
    </headerData>
    <formData>
      <issuerInfo>
        <issuerCik>0001596532</issuerCik>
        <issuerName>ARISTA NETWORKS INC</issuerName>
        <secFileNumber>001-36468</secFileNumber>
        <issuerAddress>
          <com:street1>5453 Great America Parkway</com:street1>
          <com:city>Santa Clara</com:city>
          <com:stateOrCountry>CA</com:stateOrCountry>
          <com:zipCode>95054</com:zipCode>
        </issuerAddress>
        <issuerContactPhone>4085475000</issuerContactPhone>
        <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>Ita Brennan</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
        <relationshipsToIssuer>
          <relationshipToIssuer>Officer</relationshipToIssuer>
        </relationshipsToIssuer>
      </issuerInfo>
      <securitiesInformation>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <brokerOrMarketmakerDetails>
          <name>J.P. Morgan Securities LLC</name>
          <address>
            <com:street1>390 Madison Avenue</com:street1>
            <com:street2>6th Floor</com:street2>
            <com:city>New York</com:city>
            <com:stateOrCountry>NY</com:stateOrCountry>
            <com:zipCode>10017</com:zipCode>
          </address>
        </brokerOrMarketmakerDetails>
        <noOfUnitsSold>34000</noOfUnitsSold>
        <aggregateMarketValue>6595660</aggregateMarketValue>
        <noOfUnitsOutstanding>309580650</noOfUnitsOutstanding>
        <approxSaleDate>09/07/2023</approxSaleDate>
        <securitiesExchangeName>NYSE</securitiesExchangeName>
      </securitiesInformation>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>08/22/2022</acquiredDate>
        <natureOfAcquisitionTransaction>Restricted Stock Awards</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>6868</amountOfSecuritiesAcquired>
        <paymentDate>08/22/2022</paymentDate>
        <natureOfPayment>NA</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>11/21/2022</acquiredDate>
        <natureOfAcquisitionTransaction>Restricted Stock Awards</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>6863</amountOfSecuritiesAcquired>
        <paymentDate>11/21/2022</paymentDate>
        <natureOfPayment>NA</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>02/21/2023</acquiredDate>
        <natureOfAcquisitionTransaction>Restricted Stock Awards</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>5269</amountOfSecuritiesAcquired>
        <paymentDate>02/21/2023</paymentDate>
        <natureOfPayment>NA</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>09/07/2023</acquiredDate>
        <natureOfAcquisitionTransaction>Stock Option Exercise</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>15000</amountOfSecuritiesAcquired>
        <paymentDate>09/07/2023</paymentDate>
        <natureOfPayment>Cash</natureOfPayment>
      </securitiesToBeSold>
      <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
      <remarks>Options to be exercised within 3 months from the date of filing.</remarks>
      <noticeSignature>
        <noticeDate>09/07/2023</noticeDate>
        <planAdoptionDates>
          <planAdoptionDate>06/08/2023</planAdoptionDate>
        </planAdoptionDates>
        <signature>/s/ J.P. Morgan Securities LLC as agent and attorney-in-fact for Ita Brennan.</signature>
      </noticeSignature>
    </formData>
  </edgarSubmission>
metadata_documents: [{"type": "144", "sequence": "1", "filename": "primary_doc.xml", "secsgml_size_bytes": 4624}]
text: 144
  0001494211
  XXXXXXXX
  LIVE
  0001596532
  ARISTA NETWORKS INC
  001-36468
  5453 Great America Parkway
  Santa Clara
  CA
  95054
  4085475000
  Ita Brennan
  Officer
  Common
  J.P. Morgan Securities LLC
  390 Madison Avenue
  6th Floor
  New York
  NY
  10017
  34000
  6595660
  309580650
  09/07/2023
  NYSE
  Common
  08/22/2022
  Restricted Stock Awards
  Issuer
  N
  6868
  08/22/2022
  NA
  Common
  11/21/2022
  Restricted Stock Awards
  Issuer
  N
  6863
  11/21/2022
  NA
  Common
  02/21/2023
  Restricted Stock Awards
  Issuer
  N
  5269
  02/21/2023
  NA
  Common
  09/07/2023
  Stock Option Exercise
  Issuer
  N
  15000
  09/07/2023
  Cash
  Y
  Options to be exercised within 3 months from the date of filing.
  09/07/2023
  06/08/2023
  /s/ J.P. Morgan Securities LLC as agent and attorney-in-fact for Ita Brennan.