Junos BNG Pseudowire Headend Termination (PWHT) demo Maybe it is just me, but I often find myself googling for working configuration examples, followed by searching thru my own files. Well, I was in need of an end-to-end base configuration that terminates DHCP subscriber sessions coming into the BNG over q-in-q within a pseudowire. Before I... Continue Reading →
BGP over unnumbered interfaces, automated Configuring BGP peering between many network devices in a datacenter can become quickly repeatitive, boring and hence open to human errors. Each link requires its own dual stack IP subnet with unique endpoints. The very same endpoint IP addresses must then be used to configure BGP peers on either side... Continue Reading →
Create your own Telemetry Sensor in JunosJunos offers a broad range of automation capabilities, starting from a YANG based configuration and state information base, accessible via CLI, NETCONF and REST over gRPC based JET APIs directly into various Junos daemons. Some readers might even be familiar with custom YANG, allowing operators to extend the functionality... Continue Reading →
Inject routes with multiple next-hops in Junos Recently I’ve been working on solutions to scale out terminating VNFs on multiple compute nodes attached to a router via multiple 10GE ports. ECMP is used on the router to spread traffic across these VNFs equally. The routes with multiple next hops (one per operational VNF instance) shall... Continue Reading →
Bye Evernote, hello (Dropbox) Notes Folder I’ve been a heavy Evernote users across my OS/X and IOS devices, but got more and more annoyed about my inability to find notes quickly (UI issue, or more likely, me), lack of Linux client and probably most importantly, no easy way to print/export to PDF. title Thanks to... Continue Reading →
OpenConfig and gRPC Junos Telemetry Interface Starting in Junos OS Release 16.1R3 one can request streaming telemetry data using the gRPC framework with vendor-neutral data models based on OpenConfig. Great, but what configuration is required and is there a simple client available to test and troubleshoot it? I recently faced this question myself and found... Continue Reading →
async rpc ncclient example ncclient is a great Python library that facilitates client-side scripting and application development around the NETCONF protocol: https://github.com/ncclient/ncclient Typically, one uses the provided functions in synchronous mode, where replies are awaited and the result returned. I was however in need of asynchronous mode, where operations return immediately, allowing me to do... Continue Reading →
I was in need to fetch an operational Junos script from a URL automatically at startup. Junos has such capabilities for a long time and it is based on the idea of downloading the script while an operator configures the script in Junos via CLI: [edit] mwiget@pe1# edit system scripts op file say-hello.py [edit system... Continue Reading →
DHCP Client in Junos vMX This is just a quick lab note about successfully enabling DHCP client mode on the management and revenue ports fxp0 and 0/0/x on a vMX running 17.1R1. Background is a cloud deployment, where the interface IP addresses are dynamically assigned via DHCP to the interfaces of the virtual instance. lab@vMX1>... Continue Reading →
vMX explores his surroundings in Amazon AWS Recently I started exploring ways in Junos to program IP routes in Amazon AWS EC2 using their REST API. Junos 16.1 not only comes with Python 2.7.x, but also with all the default modules and some extras, like PyEz: Understanding Python Automation Scripts for Devices Running Junos OS.... Continue Reading →
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