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JUNIPER Stories

Heavy Networking 639: Juniper Cloud Metro Boosts Metro Performance, Efficiency And Sustainability (Sponsored)

Published on: 2022-07-22

In today’s sponsored Heavy Networking podcast we dive into Juniper Cloud Metro, which includes new appliances, software, and integrations with other Juniper services to address the entire business of ownership and operations. Our guests are Kanika Atri, Sr. Director, Product Management; and Tim...

Juniper - Mist API and Automation with Postman

Published on: 2021-09-20

Juniper presented at Networking Field Day 26 on Sept 14, 2021 - I really recommend you check out the presentation on network automation that Ryan and Jake did, you will likely learn something new if you are not staying super current on network automation and APIs. Even if you are staying...

EX3400 Disk Space and Upgrades

Published on: 2021-12-21

The Juniper EX3400 switch series is a decent access switch. But a Product Manager chose to save $0.50 on COGS by choosing a 2GB disk. That’s just not enough space to handle normal Junos upgrades. This has wasted untold engineer hours on busywork. I hope that person (A) got a bonus, and (B) is...

Juniper ARP Policer on PTX

Published on: 2021-08-17

I’ve written before about the default ARP policer on Juniper MX. It can create some odd failure conditions when you’re connected to noisy networks such as large Internet Exchanges. Junos OS Evolved, as used on platforms like the PTX10003 has low default values for ARP and ICMPv6 ND DDoS...

Juniper i40e NVM Firmware Upgrade

Published on: 2021-05-20

Juniper Routing Engines with VM Host need an i40e NVM firmware upgrade. The procedure is a pain in the ass, and documentation is not great. But you can’t avoid the upgrade any more. New Junos versions need the firmware upgrade, and replacement REs will ship with it already installed. Here’s some...

Cable testing on Juniper EX switches

Published on: 2020-09-22

Does anyone use the cable test feature on EX switches? Did you even know you could do this kind of thing? In case you didn’t, here is a bit of background and an example. The Time Domain Reflectometer (TDR) test has been available on the EX switches for some time, but not a lot of […]

Juniper Direct vs Local Routes

Published on: 2020-05-31

Juniper routers consider a directly configured IP as a “direct” route, except when you use a mask (for IPv4). Then it is a “local” route. This caused me some confusion when creating a policy to redistribute loopback IP addresses into BGP. A router learns routes from a variety of sources -...

Juniper Default ARP Policer

Published on: 2020-05-11

Juniper devices have a default ARP policer that drops ARP requests and responses over 150kbps. By default, this is an aggregate policer that applies to all interfaces. This can lead to unexpected behavior when high levels of ARP on one interface lead to BGP session drops on another interface....

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