TechPost

TechPost

Byte-Sized Articles on Juniper Solutions by Network Engineers, for Network Engineers

To Spray or Not to Spray

Solving the low entropy problem of the AI/ML training workloads in the Ethernet Fabrics. Guess how many active IP flows a single GPU normally ...

MX304 FIB Install Rate

MX304 installs the full Internet tables at 47,000 routes per second, and we will show you how we are testing it. Introduction If you test ...

Using Apstra Drain Mode

Apstra supports Drain Mode for managed switches, allowing the operator to gracefully drain traffic from devices without simply shutting down the ...

Monitoring PTX Power and Environment’s KPI through Telemetry

How Junos EVO implements the OpenConfig “platform” data model to expose many indicators/counters related to environmental data. Introduction ...

Config Rendering in Juniper Apstra

A description of the different configurations that can be rendered based on the state of the devices in Apstra. ...

Apstra Freeform Day-2 Configuration

Using Tags, Property Sets, and Jinja to simplify Apstra Freeform Day-2 Configuration. ...

Building Virtual Fabrics with vJunos-switch and Containerlab

How vJunos-switch is deployed as a VM, packaged within a container, on a bare metal server using the open source network emulation tool Containerlab. ...

Introduction to Apstra Freeform

From the basic constructs Freeform uses – Tags, Device Contexts, Property Sets, and Config Templates – to creating a simple Freeform blueprint, ...

Mastering BGP PIC on JUNOS

Optimizing Failover Convergence for Enhanced Network Resilience with BGP PIC implementation in JUNOS. Introduction This blog will delve into ...

Using Apstra Policy Assurance

Apstra manages network security and workload isolation via the Policy Assurance feature. This feature allows you to create policies that are decoupled ...

Chiplets - The Inevitable Transition

A look at the semiconductor industry evolution, the inflection points, and how packaging and interconnect technologies evolved to make chiplets ...

ESI-LAG Made Easier with EZ-LAG

A detailed configuration example that shows how to dual-home data center servers to Juniper leaf switches by using EZ-LAG, a simplified version ...

BIER For SR Multicast – Cheers!

As a revolutionary multicast technology that allows efficient replication without requiring per-tree states in the network, Bit Index Explicit Replication ...

Apstra Device Replacement

An essential operation in a working data center network would be the need to replace a device that has either failed or just needs to be re-allocated/reused ...

Large Language Models - The Hardware Connection

A brief introduction to the LLMs, the hardware challenges in training these models, and how the GPU and networking industry is evolving to optimize ...

IP VPN Network Apstra Freeform

Illustration of an IP/VPN MPLS network provisioned and operated with Apstra Freeform. Introduction ...

Suspicious Control Flow Detection

Juniper enhanced the initial DDoS protection feature with Suspicious Control Flow Detection (SCFD). It provides deeper analysis within a given protocol ...

Traffic Accounting with MX Features

How much traffic coming from Internet reach my different POPs? Can I monitor in real time the traffic coming from the “TOP Internet Talkers”? Is ...

Saving Power on ACX7000 Series

How we can significantly reduce the power usage of the ACX7000 routers with basic configuration and simple best-practices. Introduction Power ...

Apstra Configlets

Configlets allow the administrator to create custom configuration templates and automatically deploy them to devices based on intent. ...

EVPN-VXLAN OISM on PTX Routers

Guide to the EVPN VXLAN based Optimised Inter-subnet Multicast (OISM) on Express4 based PTX10k platforms. ...

PTX10000 Power Optimization

Did you know: numerous built-in functionalities with Junos-EVO are enabled by default and help reducing the power usage and carbon foot-print of ...

BGP CT Use-Cases

Key applications of BGP Classful Transport (BGP-CT), including path-diversity across multiple ASes, multi-AS paths that take into account sovereignty ...

Creating Audit Trails with the Apstra Event Log

The Audit trail feature tracks a user’s actions while using Apstra and can be very useful in investigating general usage, network outages, and possible ...

Scale-Out Security Services with Auto-FBF

An alternative approach to scale-out of security services, specifically for CGN and Gi Firewall deployments called auto-fbf. Technologies in scope ...

Adding Device Profiles Using the Apstra UI

The capabilities of a specific switch hardware model are defined in the Device Profile and linked to the logical representation of the switch. Linking ...

Apstra IP Fabric Reference Design

Juniper Apstra’s fundamental purpose is to minimize operational costs and maximize the speed of network operations by furnishing predefined, rigorously ...

Centralized Deterministic CGNAT

All you need to know on Centralized Deterministic NAT configuration, scale and performance on MX routers. ...

Off Box Security Services Solution

The Juniper Off Box Security Services Solution defines a common security services complex to be used in conjunction with MX Provider Edge (PE) deployments ...

Link Slicing with MPLS and SRv6 Underlays Part 2

Another use case for link slicing: instead of data plane identifiers, control plane identifiers are used. Control plane protocols exchange the ...

Saving Energy on PTX with PFE Power Off

Let's test the real power saving on PTX platforms achieved when shutting down used and unused Packet Forwarding Engine (PFE). Introduction ...

MPLS Label Anti-Spoofing

Solution to secure BGP Option B against MPLS label spoofing on MX Series routers. ...

Optimizing Power Consumption in High-End Routers

A detailed review of the various components inside a high-end router and how they contribute to overall power consumption. Article initially ...

Time Synchronization and Class D Clocks Support

Timing and synchronization requirements and capabilities are continually evolved to drive the ultra-low latency, mission critical and advanced radio ...

BGP FlowSpec “Exclude Interfaces” on Express2 Platforms

BGP FlowSpec is one of the mechanisms that allows a network to protect itself against DDoS attacks. A common mitigation tactic is to redirect malicious ...

ACX7000 ERSPAN and Port Mirroring

Traffic mirroring is a useful method for debugging traffic patterns. The ACX7000 family of products supports both local port mirroring and ERSPAN. ...

BGP CT Interop Demo EANTC2023

BGP CT interoperability tests between Junos, Junos Evo and FreeRTR routers conducted in Berlin during the EANTC2023 event in March 2023. ...

Link Slicing with MPLS and SRv6 Underlays

The guaranteed link slicing feature, using MPLS and SRv6 as underlay transport. Link slicing is a way ...

Deploying and Using vJunos in a Bare Metal EVE-NG server

vJunos-switch and vJunosEvolved deployed on EVE-NG and integrated with Juniper Apstra to build a complete Data Center fabric. ...

vJunos Deployment on KVM

A comprehensive user guide on how to successfully deploy and use vJunos-switch and vJunosEvolved on KVM (one of the most popular virtualized environments ...

Mobile Backhaul Services Overlay

Olé, Olé, Overlays! Welcome back to the validation design series and today is all about that overlay! Introduction The previous blog ...

New Subscriber QOS for Next Generation Broadband

Broadband services are evolving with cloud streaming and advanced video, a new BNG QOS model for subscribers is required to optimise latency, throughput ...

MX304 Deepdive

A detailed review of the latest router of the MX Series. Powered by Trio6 PFE, it offers unique form-factor and modularity, with interface spanning ...

MPC10E Deepdive

A detailed view of the MPC10E line cards used in MX240, MX480 and MX480. ...

Sizing Router Buffers - Small is the New Big

Current practices and future trends on buffers in networking chips. ...

Building Border Agnostic Architectures with Seamless MPLS

Third part of the Juniper Validated Design series on basic Mobile Backhauling, with a focus on Seamless MPLS and BGP-LU. Introduction In ...

SRv6 L3VPN Inter-AS Option-C

Layer 3 Virtual Private Network Inter-AS option using SRv6 as underlay transport on MX and ACX7000 routers. ...

Service Mapping to Colored MPLS Paths

Mapping modern and legacy services to colored MPLS paths, achieving business differentiation. Introduction People say there are no greenfield ...

EVPN E-LAN on PTX10k Platforms

We validate EVPN E-LAN on Express4-based platforms playing the role of PE. In this article, we will describe the various approaches, the configurations ...

Longest Prefix Matching in Networking Chips

Basic concepts of Forwarding Information Base (FIB), the longest prefix match (LPM) for IP forwarding, and how its implementation has evolved over ...

EVPN E-Line on PTX10k platforms

Let's test EVPN ELINE/VPWS on Express4-based platforms playing the role of PE. In this article, we will describe the various approaches, the configurations ...

PTX10001-36MR FIB Install Rate

PTX10001-36MR installs the Internet routes at more than 27,000 routes per second, and we will show you how we are testing it. Introduction ...

SRv6 SID Encoding and Transposition

JUNOS 22.3 introduced several changes in the SRv6 infrastructure, this article covers them in details. ...

Juniper Apstra Introducing a True IBNS

What a true IBN system is? How relational and graph databases are different? And why graph databases are ideal for network infrastructure? ...

VPLS Validation on ACX7000

Let's verify we can support 8,000 VPLS instances in the ACX7000 products with 640,000 MAC addresses. Introduction ...

ACX7000 L2 MAC Scale and Learning Rate

We verify ACX7000 platforms support 700,000 MAC addresses with a learning rate of 14,000 entries per second. ...

L2VPN Validation on ACX7000

ACX7000 platform is tested with 8,000 Layer2 VPN Routing-instances for 99.9% line rate traffic. ...

ACX7509 Deepdive

The first centralized platform of the ACX7000 family. Based on a modular design, it offers control plane and forwarding plane redundancy with port ...

L3VPN Validation on ACX7000

ACX7000 platform has been tested successfully with 4,000 Layer3 VPN Routing-instances with BGPv4, BGPv6, OSPF, OSPFv3, ISISv4, ISISv6, Static-v4, ...

EVPN VPWS Validation on ACX7000

Junos EVPN-VPWS feature supports 8,000 instances with 4,000 VLAN-UnAware and 4,000 VLAN-Aware Service Types on ACX7000 Platforms. ...

VPLS to EVPN-VPLS Seamless Migration on MX Routers

Techniques, configurations and best practices for migrating from legacy business services to EVPN on MX Routers. ...

EVPN MAC-VRF Validation on ACX7000

JUNOS unified way of bringing up EVPN E-LAN using mac-vrf instance type supporting 6,000 instances on ACX7000 with 642,000 MAC scale. ...

Silicon Photonics and Integrated Optics

SiPh (Silicon Photonics) is no longer SciFi (Science Fiction). Let's see where is the industry today with co-packaged optics... ...

BGP RIB Sharding

Discover how BGP RIB Sharding can help improve routing performance and scale in JUNOS. ...

PTX10001-36MR Introduction

Product manager’s description of the PTX10001-36MR router. Product characteristics, port types and supported port combinations, architecture and ...

Sampling Evolution

Are the flow caches effective to support IPFIX implementations today? What happens if we stop using them? Learn about the new IPFIX implementation ...

PTX10001-36MR L2 Circuit Scale

The PTX10001-36MR is well-known for its core, peering and DCI capabilities, but it's also a very performant L2 aggregation device. In this article, ...

SRv6 Summarization

Let's discuss the multi-domain SRv6 network together with the concept of SRv6 locator summarization. SRv6 locator summarization allows for large-scale, ...

PTX FIB Compression

Did you know the internet table can be compressed significantly? We explain how the PTX Routers are currently implementing FIB compression today. ...

Inter-domain On-demand SR-TE LSPs with BGP-LS

A standard-based approach to placing MPLS-based services with path constraints across multiple networks. ...

ACX7024 Deepdive

Everything about the new addition to the Cloud-Metro family, the ACX7024. A 1-RU router, with 360Gbps forwarding capacity. Introduction ...

Seamless MPLS LDP-Signaled with OSPF IGP Underlay

Second profile of the Juniper Validated Design series on basic Mobile Backhauling, with a focus on LDP-signalled MPLS and OSPF IGP. Introduction ...

ZR/ZR+ Coherent Optics in ACX7100-32C

How does the Juniper ACX7100-32C router handle a fully loaded 400GE ZR and 100GE ZR4, long reach, high power coherent optics configuration? ...

Tearing Down the Memory Wall

The gap between processor and memory performance and density continued to increase - this is often referred to as the "Memory Wall". ...

ACX7100 Deepdive

In this post, you’ll learn everything about the first two Juniper Cloud-Metro devices: ACX7100-32C and ACX7100-48L. ...

L3VPN over SRv6

How unicast IPv4/IPv6 within L3VPN VRFs are implemented with Segment Routing v6 (SRv6) as underlaying transport technology. ...

MX10000 LC480 Deepdive

LC480 is a 48 port 1G/10G line card supporting Business Services(L2/L3) with rich OAM features, Broadband subscriber at scale, H-QoS, high filter ...

Let’s Talk About VOQ and DNX Pipeline

To understand the life of a packet in an ACX7000 Series router, you first need to understand the idea behind Virtual Output Queues. Introduction ...

Telemetry Collector and Graphical Front End on Junos Evolved

You want to install a TIG (Telegraf, InfluxDB, Grafana) stack directly in your lab router? Most network engineers have heard of using streaming ...

Layer 3 Solution for CDN Gateway

The world of CDN gateways is usually built around L2 domains and IRB, where a switch interconnects CDN servers, hosts and the L3 gateway. We propose ...

Networking Chips vs GPUs/CPUs

Networking chips (also called network processors) started getting momentum in the mid-90s, with Juniper at the forefront of the revolution, when ...

Express 4 Filters - Foundation

This series of articles provides a guide to understanding the capabilities and operating principles behind the Filter block in the Express silicon ...

SRv6 Basics: Locator and End SIDs

SRv6 (Segment Routing version 6) is a version of segment routing based on IPv6 tunneling mechanism, rather than on MPLS (MultiProtocol Label Switching) ...

MX10000 LC9600 Deepdive

All you always wanted to know of the newest MX10k line card powered by Trio 6 PFE and optimised for 100GE and 400GE requirements. Introduction ...

JVD Mobile Backhaul Overview

Summary of the Juniper Validated Design series dedicated to 5G xHaul reference architecture (Fronthaul, Midhaul, and Backhaul network segments). ...

Introducing the Validation Series

Short introduction to the validation articles. What you should expect from these blog posts, unit testing or extracts of the Juniper Validated Designs. ...

Building the ACX7000 Series: the PFE

First article “Behind The Scene” on the building of the ACX7000 Series, starting with the heart of the router: the Packet Forwarding Engine. ...