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Juniper EX Switch Ops: Initial Setup and Key Commands

Juniper EX Switch Ops: Initial Setup and Key Commands

Juniper EX switch setup: default credentials, console settings, initial configuration, VLAN and STP commands, Virtual Chassis and OSPF tuning.

admin admin 2026-08-28
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Junos EVPN-VXLAN CRB Fabric: Step-by-Step Config

Junos EVPN-VXLAN CRB Fabric: Step-by-Step Config

Configure a Junos EVPN-VXLAN CRB fabric on QFX: underlay eBGP, overlay iBGP, IRB gateways on spines, VLAN-to-VNI mapping, BUM handling and verificatio

admin admin 2026-08-28
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Junos ISIS Flap Case Study: Hello Padding and Fragmentation

Junos ISIS Flap Case Study: Hello Padding and Fragmentation

A Junos ISIS flap case study: MX adjacencies aged out from Cisco hello padding and PFE-to-RE fragmentation, fixed with the new ip-reassembly-timeout c

admin admin 2026-08-28
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Junos Interface Flapping: Hold-Time and Damping Configuration

Junos Interface Flapping: Hold-Time and Damping Configuration

Stop Junos interface flapping from churning IS-IS, OSPF and BGP: static hold-time timers, exponential damping parameters and MX PFE hardware fault han

admin admin 2026-08-28
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Junos Troubleshooting: A LAN Where Static Hosts Never Answer

Junos Troubleshooting: A LAN Where Static Hosts Never Answer

A real-world Junos debugging story: an SRX sees hosts in the ethernet-switching table but not in ARP. Follow the hunt through irb and routing-instance

admin admin 2026-08-27
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Multi-Vendor Network CLI Cheat Sheet: IOS XR, Junos, SR OS, VRP

Multi-Vendor Network CLI Cheat Sheet: IOS XR, Junos, SR OS, VRP

Scenario-based multi-vendor cheat sheet for Cisco IOS XR, Junos, Nokia SR OS and Huawei VRP: configure, verify and troubleshoot links, BGP, VLAN and e

admin admin 2026-08-27
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Junos EX: How to Identify a Flapped Interface with CLI Commands

Junos EX: How to Identify a Flapped Interface with CLI Commands

Identify a flapped interface on a Juniper EX switch: read the Last flapped field, correlate mib2d log entries and verify flap timestamps against uptim

admin admin 2026-08-27
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Junos Interface Damping: Hold-Time and Backoff

Junos Interface Damping: Hold-Time and Backoff

Junos interface damping: hold-time timers for millisecond flaps vs exponential backoff damping for second-scale flaps, with penalty math and checks.

admin admin 2026-08-26
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Juniper MX Resolve Hardware Issues: Damping and Hold-Time Guide

Juniper MX Resolve Hardware Issues: Damping and Hold-Time Guide

Juniper MX 路由器接口反复 up/down、路由振荡怎么办：本文讲解 Junos hold-time 与指数退避阻尼的配置和调参、LAG minimum-links 冗余设计、cmerror 错误分级与动作，以及从物理层到硬件层的分层排查顺序。

admin admin 2026-08-26
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Junos BGP Establishment Troubleshooting: Commands

Junos BGP Establishment Troubleshooting: Commands

Troubleshoot Junos BGP session establishment: the state machine, show bgp neighbor error codes, TCP 179 filtering, auth and MTU faults, and traceoptio

admin admin 2026-08-25
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