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<p class="MsoNormal">If you can’t wait for Juniper to release their supported QSFP28 100G-ZR optic, shop for third party 100G-ZR optics. I know many networks are already using third party QSFP28 100G-ZR optics in Juniper routers. I have one 80 km span between
two MX204 routers using third party 100G-ZR optics with no issues. As long as the optic doesn’t draw too much power or generate too much heat it should be good.<o:p></o:p></p>
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<p class="MsoNormal"><b><span style="font-size:12.0pt;color:black">From: </span></b><span style="font-size:12.0pt;color:black">NANOG <nanog-bounces+smkarp=galliumnetworks.com@nanog.org> on behalf of Joe Freeman <joe@netbyjoe.com><br>
<b>Date: </b>Friday, September 24, 2021 at 4:30 PM<br>
<b>To: </b>Randy Carpenter <rcarpen@network1.net><br>
<b>Cc: </b>nanog <nanog@nanog.org><br>
<b>Subject: </b>Re: 100GbE beyond 40km<o:p></o:p></span></p>
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<p class="MsoNormal">Open Line Systems can get you to 80K with a 100G DWDM Optic (PAM4) -<o:p></o:p></p>
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<p class="MsoNormal">I've used a lot of SmartOptics DCP-M40 shelves for this purpose. They also have transponders that allow you to go from a QSFP28 to CFP to do coherent 100G out to 120Km using the DCP-M40, without a need for regen or extra amps in line.<o:p></o:p></p>
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<p class="MsoNormal">The DCP-M40 is a 1RU box. It looks like a deep 40ch DWDM filter but includes a VAO, EDFA amp, and a WSS I think. <o:p></o:p></p>
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<p class="MsoNormal">On Fri, Sep 24, 2021 at 4:40 PM Randy Carpenter <<a href="mailto:rcarpen@network1.net">rcarpen@network1.net</a>> wrote:<o:p></o:p></p>
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How is everyone accomplishing 100GbE at farther than 40km distances?<br>
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Juniper is saying it can't be done with anything they offer, except for a single CFP-based line card that is EOL.<br>
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There are QSFP "ZR" modules from third parties, but I am hesitant to try those without there being an equivalent official part.<br>
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The application is an ISP upgrading from Nx10G, where one of their fiber paths is ~35km and the other is ~60km.<br>
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thanks,<br>
-Randy<o:p></o:p></p>
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