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ACX7000 platform is tested with 8,000 Layer2 VPN Routing-instances for 99.9% line rate traffic. Introduction This is the third article in the ACX7k Metro Validation Series: 1. EVPN MAC-VRF(E-LAN) 2. EVPN VPWS 3. L3VPN, 6VPE 4. L2VPN 5. VPLS 6. L2 MAC Scale and Learning Rate In this article, we validate the L2VPN feature scale support on the ACX7100-32C platform with 22.2R1 Junos-EVO image. L2VPN is a BGP or LDP MPLS Enabled Solution to connect Customer Edge Devices (CEs) across a Provider Edge Network. RFC-6624 supports L2VPN using BGP ...
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ACX7509 Deepdive

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The first centralized platform of the ACX7000 family. Based on a modular design, it offers control plane and forwarding plane redundancy with port density spanning from 1GE to 400GE, in just 5RU. Introduction The ACX7509 is a centralized platform part of the ACX7000 family. This router is powered by two Broadcom Jericho2c [BCM8882x] and runs Junos EVO modular software. Figure 1: Front view of the ACX5709 Figure 2: Front view of the ACX5709 with EMI door With 5RU height and 600mm depth, it’s a very small form-factor modular system proposing 9 slots (8 available with current hardware generation) for three types of line cards ...
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ACX7000 platform has been tested successfully with 4,000 Layer3 VPN Routing-instances with BGPv4, BGPv6, OSPF, OSPFv3, ISISv4, ISISv6, Static-v4, Static-v6 as CE-PE protocols and with a total of 1.35M routes. Introduction This is the third article in the ACX7k Metro Validation Series: 1. EVPN MAC-VRF(E-LAN) 2. EVPN VPWS 3. L3VPN, 6VPE 4. L2VPN 5. VPLS 6. L2 MAC Scale and Learning Rate In this article we validate the L3VPN, 6VPE, 6PE feature scale support on ACX7100-32C platform with 22.2R1 Junos-EVO build. RFC 4364 describes BGP-enabled L3VPN to connect Customer Edge Devices (CEs) across a Provider ...
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Junos EVPN-VPWS feature supports 8,000 instances with 4,000 VLAN-UnAware and 4,000 VLAN-Aware Service Types on ACX7000 Platforms. Introduction This is the second article in the ACX7k Metro Validation Series: 1. EVPN MAC-VRF (E-LAN) 2. EVPN VPWS 3. L3VPN, 6VPE 4. L2VPN 5. VPLS 6. L2 MAC Scale and Learning Rate In this article, we validate the EVPN-VPWS feature and its scale on ACX7100-32C with 22.2R1 Junos-EVO image. RFC-8214 describes the VPWS support with EVPN . EVPN-VPWS is a point-to-point ethernet service based on BGP MPLS connecting Customer Edge Devices (CEs) ...
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Techniques, configurations and best practices for migrating from legacy business services to EVPN on MX Routers. Introduction Service providers started adopting the EVPN technology as a replacement for their L2 technology requirements like VPLS, L2VPN. There is a lot of benefits of EVPN as a technology which is briefly covered in the below section. At the same time service providers also look for the migration of the legacy L2 technologies (which has with a lot of limitations) to the EVPN technology. This solution provides a lot of flexibility to the service providers in doing a staged migration and the best part ...
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JUNOS unified way of bringing up EVPN E-LAN using mac-vrf instance type supports 6,000 instances on ACX7100-32C with 642,000 MAC Scale. Introduction This article is the first in a series on ACX7k Metro Validation. We are covering the following features and their scale. 1. EVPN MAC-VRF(E-LAN) 2. EVPN VPWS 3. L3VPN, 6VPE 4. L2VPN 5. VPLS 6. L2 MAC Scale and Learning Rate Layer-2 VPN Technologies provide multipoint services over IP/MPLS networks. The latest addition to this is Ethernet VPN (EVPN) where MAC learning is done via control plane compared to its predecessor Virtual Private LAN ...
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SiPh (Silicon Photonics) is no longer SciFi (Science Fiction). Let's see where is the industry today with co-packaged optics... Article initially published on LinkedIn . Introduction This article explains the basic concepts of optical communication, the evolution of Silicon Photonics, how the industry is moving toward integrating optics with ASICs in co-packaged solutions, and the future... Optical Communication When the network switches/routers were deployed two decades ago, they mainly used copper cables for data transmission. But copper cables, limited by the speed of electrons, are mostly suitable for ...
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Discover how BGP RIB Sharding can help improve routing performance and scale in JUNOS. Introduction Border Gateway Protocol (BGP) forms the basis for routing in the Internet and datacenter networks. This protocol has a track record of successfully running the Internet for years. It supports extensive policy controls and is expected to handle very large prefix scale as compared to intra-domain protocols like OSPF and ISIS. BGP’s multi-protocol capabilities are used to setup large Layer2 and Layer3 VPNs on top of a core IP or IP/MPLS backbone. But it does suffer from some issues like ‘slower ...
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Product manager’s description of the PTX10001-36MR router. Product characteristics, port types and supported port combinations, architecture and the applications of the router are all outlined in the article. Overview PTX10001-36MR is a compact 9.6T system designed for multiple applications: peering, core, content delivery network router, data center spine switch and a data center gateway. In other words, it is designed for applications that require deep buffering and burst absorption, high route scale, visibility into traffic flows, and filtering capabilities, plus various L2 and L3 services and transport options, such as MPLS, and popular overlays ...
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Sampling Evolution

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Are the flow caches effective to support IPFIX implementations today? What happens if we stop using them? Learn about the new IPFIX implementation in Juniper PTX routers. Introduction NetFlow was initially designed as a flow monitoring technique where network element monitors IP flows, aggregates statistics over multiple packets of the same flow and periodically exports flow statistics to the collector. Flow statistics typically include information that identifies a flow (a combination of IP header fields), and metadata, such as incoming interface of the packet and outgoing interface. Modern versions of the NetFlow protocol are standardized in IETF, RFC ...
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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, we will test and demonstrate L2 virtual circuits scale on Express4-based PTX routers. Introduction Each Express 4 ASIC (Codename: “BT”) supports up to 16384 logical interfaces. In this test scenario we distribute logical interfaces between two PFEs of a PTX10001-36MR as shown in Figure 1: Figure1: 32K CCC Test Figure 2 shows relationships between interfaces, circuits and remote edge devices. The setup has a trivial next-hop topology without any load balancing. Note that regular “et-” interfaces ...
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Let's discuss the multi-domain SRv6 network together with the concept of SRv6 locator summarization. SRv6 locator summarization allows for large-scale, multi-domain deployments with SRv6. Introduction Third TechPost article in the SRv6 Series: In the last blog I discussed the End.DT4, End.DT6 and End.DT46 SIDs , which are used to realize L3VPN, both IPv4 and IPv6, over SRv6. In this blog I will discuss the multi-domain SRv6 network together with the concept of SRv6 locator summarization. SRv6 locator summarization allows for large-scale, multi-domain deployments with SRv6. This blog is based on the capabilities of JUNOS 22.2. Multi-Domain Network ...
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PTX FIB Compression

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Did you know the internet table can be compressed significantly? We explain how the PTX Routers are currently implementing FIB compression today. TL;DR FIB Compression has been discussed for a very long time in this industry, but what most people probably don’t know: it’s already very efficiently deployed in many production networks. The maximum compression ratio we can get on today’s internet table is 82% but we found in production networks it was reducing the FIB table by 50-65% in most cases. Introduction RIPE NCC announced in November 2019 they made their final IPv4 allocation, and still, the public internet table is growing at a constant rate, ...
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A standard-based approach to placing MPLS-based services with path constraints across multiple networks. Have you tried bringing up inter-domain tunnels in MPLS networks? Well, then you know it’s not so straightforward! Especially when you require fine-grained traffic-engineering (TE), like delay-based routing or link affinities spanning beyond a single autonomous system (AS). While there are multiple options available, let’s have a look how to use BGP-LS (Border Gateway Protocol - Link State) to distribute TE information where IGPs (Interior Gateway Protocol) cannot reach. Below is a sample ...
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ACX7024 Deepdive

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Everything about the new addition to the Cloud-Metro family, the ACX7024. A 1-RU router, with 360Gbps forwarding capacity. Introduction ACX7024 is 1RU Ethernet-only router with 360Gbps bidirectional forwarding capacity and with Class-C Timing. It is the temperature hardened and support from -40C to +65C. This router is primarily targeted at the Cell site /Access market but can be used in multiple roles as soon as features and scales are meeting the requirements. It supports Ethernet ports from 1GE to 100GE. Port Speed ACX7024 Ports Details Total 100GE 4x1 4 50GE 4x (2x1) 8 40GE ...
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Second profile of the Juniper Validated Design series on basic Mobile Backhauling, with a focus on LDP-signalled MPLS and OSPF IGP. Introduction In this section, we’ll walk through essential components of the Seamless MPLS Mobile Backhaul (MBH) topology demonstrated in Profile-2, which features OSPF and LDP-signaling. Check the first article "JVD Mobile BackHaul Overview" ( https://community.juniper.net/blogs/kevin-brown/2022/06/28/jvd-mobile-backhaul-overview ) to understand the different profiles created for this Juniper Validated Design (JVD). Validated Solution The solution is further enhanced with per-prefix Remote LFA for OSPF. Within ...
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How does the Juniper ACX7100-32C router handle a fully loaded 400GE and 100GE ZR/ZR+, long reach, high power coherent optics configuration? Introduction In this article, I want to talk about long reach, high power coherent optics challenges on 1RU fixed form-factor routers and how Juniper’s ACX7100-32C (Cloud Metro ACX platforms) handles these challenges with design choices to optimize the thermals. To answer the question with data-points “Will ACX7100-32C handle ZR4/ZR optics across all ports (x36) and stay stable under 4.8Tbps of traffic load and ambient and higher temperature?”, the article is divided into three sections: System design & ...
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The gap between processor and memory performance and density continued to increase - this is often referred to as the "Memory Wall". Article initially published on LinkedIn. Introduction: Von Neumann Bottleneck / Memory Wall All modern computers are built using the principles of Von Neuman Architecture . In this architecture, the program and the data reside in memory (usually an external memory based on the DRAM technology) and the processor (CPU) fetches instructions and data from the memory to execute them sequentially. The process of moving the data from the main memory to the CPU incurs long latencies and consumes significant ...
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ACX7100 Deepdive

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In this post, you’ll learn everything about the first two Juniper Cloud-Metro devices: ACX7100-32C and ACX7100-48L. Article co-written by Nicolas Fevrier and Pankaj Kumar. High-Level Introduction ACX7100 is the first Juniper product powered by Broadcom Jericho2 [BCM88690] and running Junos EVO modular software architecture. The products exists in two flavors: ACX7100-48L: 48 ports 10/25/50GE and 6 ports 100/200/400GE ACX7100-32C: 32 ports 40/100GE and 4 ports 100/200/400GE ACX7100-48L AND ACX7100-32C Front View Both devices are 1RU Ethernet-only routers with 4.8 Tbps ...
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