#lldp

[deltastech]

LLDP Kullanımı ve Layer 3 Switch Tanımı

Ağ yönetimindeki en gelişmiş teknolojilerden biri olan LLDPnin kullanımıyla ilgili her şey! Ağınızı optimize etmek ve sorunları tespit etmek için bu pratik rehberi keşfedin.

Ağ teknolojileri hızla geliştikçe, şirketlerin ve organizasyonların veri iletişimi için daha karmaşık ve verimli çözümlere ihtiyaç duydukları bir gerçektir. Bu noktada, Layer 3 switchler önemli bir rol oynamaktadır. Layer 3 switchler, ağdaki veri trafiğini yönlendirmek ve paketleri hedeflerine ulaştırmak için kullanılan cihazlardır. Peki, Layer 3 switch nedir ve nasıl çalışır? Aynı zamanda LLDP…

[catalinamarein]

Esta historia no iba a tener más que cuatro capítulos, pero sus personajes me atraparon tanto que me rendí ante ellos, por lo que les estaré escribiendo su propio historia.

Ellos están en LLdP, pero no son más que mitos y cuentos para niños o eso creían 😳. Magia (Adelina) y Makor son parte del Folklore de la historia principal, pero toda leyenda proviene de algún lugar y en muchos casos no es más que la verdad contada de forma oral.

Dado que en la historia principal no se ahonda sobre quién es Magia y porque está tan relacionada con los Gisbert, vi necesario hacer un libro aparte que iba a ser de cuentos y relatos cortos, pero después considerándolo y debido a mi fascinación por estos dos personajes vi conveniente hacerles su propio libro, no tendrá casi nada de relación con LLdP ya que esos acontecimientos suceden mucho tiempo después en el futuro, pero si tendrán una leve mención (mis lobitoa siempre están presentes 🖤).

Está historia será más fantasiosa en comparación con su predecesora, esto única y exclusivamente debido a la esencia “divina” de los protagonistas.

LLdP viene a ser una alegoría a muchas cosas, pero es una historia que se desarrolla en mundo alterno al nuestro, donde la magia cobra vida y la geografía es bastante (más) distinta a lo que conocemos hoy día.

[mangthanhcong]

Switch 24+2 Gigabit Network Management Layer 2 Rackmount Industrial mã YT-CM6026-2GF24T CM6026-2GF24T is a network-managed industrial-grade Ethernet switch that provides 2 Gigabit optical ports and 24 100M electrical ports. It adopts a fanless, low power consumption, industrial 4-level design and has an IP40 protection level. It has a working temperature of -40 ~ 85°C, has a strong sturdiness, is specially designed for network communication in a harsh application environment, and has high EMI/EMS protection capabilities. Supports advanced management and security features, such as IGMP snooping, IEEE 802.1Q VLAN, QoS, port mirroring, SNMP, RMON, etc., and Link Aggregation, WT-Ring and RSTP/STP for redundant backup increase the network Reliability and availability. Features Provide2 Gigabit optical ports , 24 100M electrical ports Fanless design,IP40 protection level, impact resistant aluminum shell Support dual power supply redundantbackup input, applicable voltage range AC/DC85 ~ 265V EMCindustry level 4 electromagnetic compatibility standard Command line (CLI ) +WEB interface, can quickly configure network functions supporting configurationthe WT-Ring (switching time < 2 0ms ) and STP / RSTP ring network SNMP V1/V2c/V3, support WTNMS integrated network management Ordering information order information CM6026-2GF24T 2 Gigabit optical ports + 24 100M electrical ports, power supply characteristics: AC/DC85～265V packing list: One industrial Ethernetswitch Installation accessories One U disk, including user manual Warranty card Certificate Tag: rack-mounted managed switch Technical parameters interface Serial port: RS-232 (interface type: RJ45 slot) Gigabit optical port: 1000Mbps (interface type: SFP slot) 100M electrical port: 10/100Mbps adaptive, Full/Half duplex mode, support MDI/MDI-X. LED indicator: PWR1, PWR2, ALM, Link/ACT, SPD, SYS Relay: 3 channels, power 1 channel, power source 2 channel, power alarm channel. Support standard IEEE 802.3 10BaseT IEEE 802.3u 100BaseT IEEE 802.3z 1000BaseFX IEEE 802.3x flow control IEEE 802.1D STP IEEE 802.1w RSTP IEEE 802.1p Cos IEEE 802.1Q VLAN protocol IGMP Snooping, GMRP, GVRP, SNMPv1/v2c/v3, TFTP, SNTP, RMON, HTTP, SSH, Telnet, Syslog, LLDP, EtherNet/IP, Modbus/TCP MIB: MIB-II, BRIDGE MIB, Ethernet MIB, IF MIB, RMON MIB Group 1, 2, 3, 9 Switch properties Qos queue: 4 VLAN-ID: 1-4094 Backplane bandwidth: 8.8Gbps MAC address table: 8K Message buffer size: 3Mbits Power requirement Input voltage: support two redundant backup, AC/DC85～265V Input current: 210mA max Physical properties Shell: Aluminum shell, IP40 protection Size: 440mm*320mm*44mm Weight: 3100g Installation method: rack working environment Working temperature: -40 ~ 85°C (-4 0~ 185°F) Storage temperature: -40 ~ 85°C (-40 ~ 185°F) Environmental relative humidity: 5 ~ 95% (non-condensing) Industry standards and Certification Electromagnetic Interference (EMI): FCC Part 15/CISPR22 (EN55022): Class A Electromagnetic susceptibility (EMS): IEC61000-4-2 (ESD) Level 4, IEC 61000-4-3 (RS) Level 3, IEC 61000-4-4 (EFT) Level 4, IEC 61000-4-5 (Surge) Level 4, IEC 61000- 4-6(CS) Level 3 Vibration resistance: IEC 60068-2-6 Shock resistance: IEC 60068-2-27 Free fall: IEC 60068-2-32 Note: Please check the latest certification status on the official website of Yuantuo. MTBF (Mean Time Between Failure) Time: 500000 h Quality Assurance 3 years For more information, please view the data sheet in "Related Downloads"

[ericvanderburg]

Link Layer Discovery Protocol (LLDP)

http://securitytc.com/T85QtQ

[termipore]

Understanding Termipore PWD – our LLDP pipes, approved by Public Works Department for Anti-termite Reticulation.

Introduction

As we know, termites are a persistent threat to buildings and structures, causing extensive damage that can be both costly and challenging to repair. In today’s times of super expensive construction and repair costs; proactive preventive termite management known as Anti-termite Reticulation is highly preferred over traditional methods that control, not prevent termites.

Reticulation method for termite prevention is more cost-effective, easy to install, hassle-free to inject termiticides, sustainable and environmentally friendly.

As you may be aware, preventive reticulation system consists of a network of underground pipes installed across the construction and around the perimeter of a building. This network is designed to distribute a termiticides throughout the soil to create a protective barrier against termites. Repeat treatment and predetermined interval, ensures a continuous barrier that prevents termites from entering the structure. The system is typically installed during the construction phase of a building, but it can also be retrofitted to existing structures.

Brand TermiPore is available in various materials and sizes, as per the requirement of our clients. The Public Works Department in India has approved anti-termite reticulation systems with LLDP (Low Linear Density Polyethylene) pipes. www.termipore.com

TermiPore light weight LLDP pipes are a popular choice due to their durability and flexibility, cost-efficiency & corrosion resistance. TermiPore LLDP pipes are also known for their ability to withstand the rigors of underground installation, making them an ideal choice for use in anti-termite reticulation systems. The pipe has pressure operated holes at the prescribed distance that give the desired flow rate without any blockage, as can be seen from the pictures.

Guidelines of Public Works Department (PWD) are as follows:

“Providing and laying of permanent piping technology anti-termite treatment before flooring work by installing LLDP (Low linear density polyethylene) tube of 8 mm O.D. & 6.4 mm I.D.with inbuilt pressure compensation chip at every 30 cm interval in the tube, having working pressure of 2 kg/cm2 and release rate of 1.9 Itr/hour fixed by P-clips and nails. The LLDP pipe shall be installed at the entire periphery of the building and at internal network of building at a depth of 20 to 200 mm under floor at every 2 to 3 mtr. c/c distance (adjusted as per building layout) & ends of loop pass through a PVC elbow of minimum 32mm ID at junction box of wall and floor level, entering into a steel reinforced grooved flexible pipe of minimum 22 mm ID leading into Junction box and the loops shall terminate in junction boxes & test every junction during injecting chemicals for termite control treatment.”

“Anti termite treatment of floor using Imidacloprid 30.5% EC non repellent, odourless, low dose, environmentally safe termiticide with rapid action non corrosive stain free, by drilling 12mm diameter holes 300mm apart injecting the emulsion as per specification and plugging with cement mortar 1:2 ( 1 cement: 2 coarse sand) in the whole floor area DPE 12mm diameter termitube system with required number of junction boxes are to be installed.”

TermiPore PWD meets all the required parameters in terms of material and design; and is PWD approved. Brand TermiPore, manufactured by an ISO 9001:2015 Certified company; is known for its reliability, superior quality & dependable customer support and service. For more information, visit www.termipore.com Or contact us at: +91 6359292525 / 8401017087 / marketing@termipore.com

#everyone #every #termipore #termiporepipe #termiporeproduct #antitermite #termite #termiteproof #install #installation #porouspipe #pipe #safehouse #termitecontrol #pestcontrol #TermiteProof #termitetreatment #termiteinspection #reticulation #globallyuse #popular #experience #antitermitereticulation #preventingtermites #pesttreatment #feedback

[mip248]

This looks like a handy LLDP tool for Windows - found this courtesy of Willie Howe

[sssvietnam]

Switch CBS350-8P-E-2G-EU Cisco Business 350 Series 8 ports GE + PoE , external power.

Switch CBS350-8P-E-2G-EU Cisco Business 350 Series 8 cổng gigabit PoE +, nguồn ngoài.

Swi ccbán bởi Cisco, là dòng switch giá rẻ dùng cho môi trường SMB. switch có 8 cổng RJ45 10/100/1000BASE-T kết hợp khả năng cung cấp nguồn hiệu Cisco PoE + cho các thiết bị đầu cuối yêu cầu nguồn như camera, access point...

Mỗi cổng có thể cung cấp điện năng lên đến 30W. Tổng công suất cung cấp là 240W cho 8 cổng. Switch hỗ trợ chuẩn LLDP-MED cho phép tự động phát hiện thiết bị cuối và cấp phát điện theo nhu cầu thực tế. Điều này giúp tiết kiệm điện và bảo vệ thiết bị.

Switch Cisco 350-8P có 2 khe cắm nguồn ngoài, mỗi khe 100-240V cho phép dự phòng nguồn. Ngoài ra còn có 1 khe expansion cung cấp thêm 2 cổng SFP+ 1G.

Switch hỗ trợ chuẩn chống ồn FastEthernet là IEEE 802.3af/at cho phép tự động phát hiện thiết bị cuối và cung cấp đúng lượng điện phù hợp.

Switch được quản lý thông qua giao diện web hoặc điện thoại di động thông qua ứng

https://sss.net.vn/thiet-bi-chuyen-mach-cisco-cbs350-8p-e-2g-eu

[invoitplast]

Pulverizer Supplier in Haryana

Pulverizer Supplier in Haryana: Invoit Plast: Invoit Plast Machinery Pvt Ltd manufactures, supplies, and exports plastic processing equipment. The device is commonly known as a pulverizer. Just a handful of the many different types of pulverizers that are available include plastic, PVC, LLDP, and disc pulverizers. To create new plastic items, the process involves placing the plastic into a pulverizer and grinding it into tiny particles. Plastic Pulverizer: Processing spent plastic trash into useful material is a typical practice in the plastic recycling sector. To create new plastic items, manufacturers place the plastic into a pulverizer and grind it into tiny particles. PVC Pulverizer: Using a PVC pulverizer, the PVC recycling industry frequently converts spent PVC waste into powder form, effectively reducing PVC components. LLDP Pulverizer: Manufacturers dedicate the production of a device known as an LLDP pulverizer to powdering linear low-density polyethylene (LLDP) materials. It finds frequent application in the plastic recycling sector to convert LLDP waste into useful material. Disc Pulverizer: A device called a disc pulverizer uses a rotating disc to grind up various materials into powder. Manufacturers place the plastic into a pulverizer and grind it into tiny particles to create new plastic items. Pulverizers are important pieces of equipment that help transform raw materials into fine powders, which is a crucial job in many industries. The process of creating new plastic items involves placing the plastic into a pulverizer and grinding it into tiny particles. We Provide Pulverizer Supplier in Haryana. Read the full article

[radiocalamar]

La liga de los puertos | Intro

Aquí el Peón, también conocido como Tintín, que es el pseudómino que uso yo, Marcos. Primereamente perdón, por causar fastidio metadisursivo, pero como el uso de tal recurso estilisto es el causante de muchos convenios ilícitos, mi vida estoy direccionando, como Tristan Harris, a la desarticulación de tales, para corroborar su usufructo. Bienvenidos, a LLdP, o la Liga de los Puertos.

[chipsterai]

Windows Ethernet Card Settings & Registry Optimizations to Reduce Latency & Buffer-bloat UDP GUI Applications

Offloading Settings

Note that some of the "TCP offload" settings should be applied both globally at the OS level, and in the Network adapter properties. It can help reduce CPU utilization and power consumption, and it can improve throughput in some scenarios. However, some offloads (TCP Offloads, LSO Offloads) can can also add some latency to the connection, and introduce issues.

****Recommend enabling only Checksum offloads, and disabling other types of TCP offloads, because of many buggy driver implementations causing timeouts, incomplete file transfers, known SQL server issues, etc..**** (Remember this when you get to the end.)

IPv4/TCP/UDP Checksum Offload: Enables the adapter to compute the IPv4/TCP/UDP checksum of packets instead of the OS, which reduces CPU utilization, and may theoretically increase adapter performance. This should be set to "enabled" in most common scenarios.

Offload TCP Segmentation: Allows the adapter to perform any necessary TCP segmentation of outgoing packets instead of the host OS, which can help increase transmission performance while also reducing CPU utilization. Recommend turning this off because of buggy implementations.

Large Send Offload / Large Receive Offload: This is enabled by default on many Intel/Broadcom adapters, however, there are known issues with its implementation. I recommend disabling this setting to avoid incomplete FTP file transfers and other sporadic internet issues.

Receive/Transmit Buffers: The buffer size of system memory that can be used by the adapter for received packets. This can be increased to help improve performance of network traffic, at the expense of some system memory. Intel adapter drivers usually have this setting under the network adapter properties -> Advanced -> Performance Options: "Receive Buffers" and "Transmit Buffers". Default is usually between 128 and 256 for both, it can be increased to 512, or even up to 1024 on systems with plenty of RAM to spare. This recommendation is true for both gaming/latency and pure throughput optimizations. Generally these buffers shouldn't be set to less than 256, as they can cause dropped packets and performance degradation if exhausted. For example, with a Realtek Gigabit LAN, increasing transmit buffers from the 128 default to 256 can give up to 30% transfer speed boost to a NAS.

ARP Offload: Enables the adapter to respond to ARP requests, which prevents the computer from having to wake for them when asleep.

NS Offload: Enables the adapter to respond to Neighbor Discovery Neighbor Solicitation requests, which prevents the computer from having to wake for them when asleep.

***Disable these to decrease overhead unless you need them.

- Client for Microsoft Networks - allows a computer to access resources on the MS network

- File and Print Sharing for Microsoft Networks - necessary to share local folders

- Internet Protocol Version 4 (TCP/IPv4) - necessary logical connection between network devices, superseded by the newer IPv6

- QoS Packet Scheduler unless needed for server/vlan

- Microsoft Network Adapter Multiplexor Protocol

- Microsoft LLDP Protocol Driver - Link Layer Discovery Protocol (LLDP) is a protocol for network devices to advertise their identity and neighbors, used for a network map.

- Link-Layer Topology Discovery Responder

- Link-Layer Topology Discovery Mapper I/O Driver

- Internet Protocol version 6 (TCP/IPv6)

Network Throttling Tweak

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Multimedia\SystemProfile]

"NetworkThrottlingIndex"=dword:ffffffff (DWORD, default: 10, recommended: 10 for media sharing, ffffffff for gaming and max throughput, valid range: 1 through 70 decimal or ffffffff to completely disable throttling)

It is only recommended to change this setting in saturated Gigabit LAN environments, where you do not want to give priority to multimedia playback. Reportedly, disabling throttling by using ffffffff can also help reduce ping spikes in some online games, video chat applications.

System Responsiveness Software Tweak

(TCP Optimizer "Advanced Settings" tab)

Exists in all versions of Windows from Vista to 8.1/10/2012 Server.

Multimedia applications use the "Multimedia Class Scheduler" service (MMCSS) to ensure prioritized access to CPU resources, without denying CPU resources to lower-priority background applications. This reserves 20% of CPU by default for background processes, your multimedia streaming and some games can only utilize up to 80% of the CPU. This setting, in combination with the "NetworkThrottlingIndex" can help some users with audio/ video streaming. We recommend reducing the reserved CPU for background processes from the default of 20%.

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Multimedia\SystemProfile]

"SystemResponsiveness"=dword:00000000 (default: 20, recommended: decimal 10 for general applications, 0 for pure gaming/streaming)

Note: In Server operating systems (Windows 2008-2012 Server), SystemResponsiveness is set to 100 by default, denoting that background services should take priority over any multimedia applications.

Congestion Control Provider

The TCP Congestion Control Algorithm controls how well, and how fast your connection recovers from network congestion, packet loss, and increase in latency. Microsoft changed the default "congestion provider" from CTCP to CUBIC with the Windows Creators update.

Recommended: CTCP for gaming, video chat and latency sensitive apps, CUBIC for pure throughput.

To see the current setting, in PowerShell use: Get-NetTCPSetting | Select SettingName, CongestionProvider (in later Windows 10 builds, the default used template "SettingName" is "Internet".

Note: If using CTCP and with lossy connections (good possibility of congestion/packet loss), you may also want to enable ECN.

OS level more info/

Disable Large Send Offload (LSO)

(Editable with the TCP Optimizer) Windows 2010 & 2012 Server, not available in earlier Windows versions

Large Send Offload lets the network adapter hardware to complete data segmentation, rather than the OS. Theoretically, this feature may improve transmission performance, and reduce CPU load. The problem with this setting is buggy implementation on many levels, including Network Adapter Drivers.

Intel and Broadcom drivers are known to have this enabled by default, and may have many issues with it. In addition, in general any additional processing by the network adapter can introduce some latency which is exactly what we are trying to avoid when tweaking for gaming performance. It’s recommend disabling LSO at both the Network Adapter properties, and at the OS level with the setting below.

Default: adapter-dependent

Recommended: disable (both in network adapter properties and in the TCP/IP stack at the OS level)

Disable-NetAdapterLso -Name * (disable LSO for all visible network adapters)

Enable-NetAdapterLso -Name * (to enable LSO for both IPv4 and IPv6 on all network adapters, not recommended)

Get-NetAdapterLso -Name * (get a list of network adapters that support LSO)

Receive-Side Scaling State (RSS)

It is sometimes useful to disable RSS if you need to reduce CPU load. This is useful on systems with older/slower CPUs where applications tax the processor up to 100% at times. This isn’t very common for daily use.

Router Level Tips

WMM of course

Segment your device (Vlan if possible. This is another discussion).

Upstream QOS or Shape your Upload traffic.

Block certain ports/open them.

Watch your logs for bad traffic & change MAC IP if needed.ppp

(Will Have Examples For WiFi6 & QOS)

TCP/UDP Timeouts - tweaking the TCP/UDP timeouts can have a noticeable impact on your connection by freeing up resources for active connections.

[hackgit]

[Media] ​​NETworkManager

​​NETworkManager A powerful tool for #managing #networks and troubleshoot network problems! You can connect to and manage remote systems via Remote Desktop, PowerShell, PuTTY, TigerVNC or AWS (Systems Manager) Session Manager. Furthermore it contains features like a WiFi analyzer, IP scanner, port scanner, ping monitor, traceroute, DNS lookup or a LLDP/CDP capture (and many more) to analyze your network and troubleshoot network problems. You can save your hosts (or networks) in profiles which can be used in the various features. For additional security, the profile file can be encrypted. https://github.com/BornToBeRoot/NETworkManager

[mangthanhcong]

Switch quang điện 24-port 10/100Baes-T(X) + 2 port 1000Base-X(SFP slots), Rack type, AC/DC85～265V, MANAGED mã YT-CM6026-2GF24T YT-CM6026-2GF24T is a network-managed industrial-grade Ethernet switch that provides 2 Gigabit optical ports and 24 100M electrical ports. It adopts a fanless, low power consumption, industrial 4-level design and has an IP40 protection level. It has a working temperature of -40 ~ 85°C, has a strong sturdiness, is specially designed for network communication in a harsh application environment, and has high EMI/EMS protection capabilities. Supports advanced management and security features, such as IGMP snooping, IEEE 802.1Q VLAN, QoS, port mirroring, SNMP, RMON, etc., and Link Aggregation, WT-Ring and RSTP/STP for redundant backup increase the network Reliability and availability. Features Provide2 Gigabit optical ports , 24 100M electrical ports Fanless design,IP40 protection level, impact resistant aluminum shell Support dual power supply redundantbackup input, applicable voltage range AC/DC85 ~ 265V EMCindustry level 4 electromagnetic compatibility standard Command line (CLI ) +WEB interface, can quickly configure network functions supporting configurationthe WT-Ring (switching time < 2 0ms ) and STP / RSTP ring network SNMP V1/V2c/V3, support WTNMS integrated network management Ordering information order information CM6026-2GF24T 2 Gigabit optical ports + 24 100M electrical ports, power supply characteristics: AC/DC85～265V packing list: One industrial Ethernetswitch Installation accessories One U disk, including user manual Warranty card Certificate Tag: rack-mounted managed switch Technical parameters interface Serial port: RS-232 (interface type: RJ45 slot) Gigabit optical port: 1000Mbps (interface type: SFP slot) 100M electrical port: 10/100Mbps adaptive, Full/Half duplex mode, support MDI/MDI-X. LED indicator: PWR1, PWR2, ALM, Link/ACT, SPD, SYS Relay: 3 channels, power 1 channel, power source 2 channel, power alarm channel. Support standard IEEE 802.3 10BaseT IEEE 802.3u 100BaseT IEEE 802.3z 1000BaseFX IEEE 802.3x flow control IEEE 802.1D STP IEEE 802.1w RSTP IEEE 802.1p Cos IEEE 802.1Q VLAN protocol IGMP Snooping, GMRP, GVRP, SNMPv1/v2c/v3, TFTP, SNTP, RMON, HTTP, SSH, Telnet, Syslog, LLDP, EtherNet/IP, Modbus/TCP MIB: MIB-II, BRIDGE MIB, Ethernet MIB, IF MIB, RMON MIB Group 1, 2, 3, 9 Switch properties Qos queue: 4 VLAN-ID: 1-4094 Backplane bandwidth: 8.8Gbps MAC address table: 8K Message buffer size: 3Mbits Power requirement Input voltage: support two redundant backup, AC/DC85～265V Input current: 210mA max Physical properties Shell: Aluminum shell, IP40 protection Size: 440mm*320mm*44mm Weight: 3100g Installation method: rack working environment Working temperature: -40 ~ 85°C (-4 0~ 185°F) Storage temperature: -40 ~ 85°C (-40 ~ 185°F) Environmental relative humidity: 5 ~ 95% (non-condensing) Industry standards and Certification Electromagnetic Interference (EMI): FCC Part 15/CISPR22 (EN55022): Class A Electromagnetic susceptibility (EMS): IEC61000-4-2 (ESD) Level 4, IEC 61000-4-3 (RS) Level 3, IEC 61000-4-4 (EFT) Level 4, IEC 61000-4-5 (Surge) Level 4, IEC 61000- 4-6(CS) Level 3 Vibration resistance: IEC 60068-2-6 Shock resistance: IEC 60068-2-27 Free fall: IEC 60068-2-32 Note: Please check the latest certification status on the official website of Yuantuo. MTBF (Mean Time Between Failure) Time: 500000 h Quality Assurance 3 years

[guncelkal]

Algo 8180G2 IP Paging and SIP Loud Ringer Audio Alerter (8180 G2)

The Algo 8180G2 is a second generation 8180 PoE wall mounted loud speaker, is SIP compliant, and designed for Voice over IP (VoIP) paging, IP loud ringing, and emergency/safety/security notification and alerting. The 8180G2 features a built-in amplifier, I/O relay, speaker output port, and line-level audio output and supports TLS, SRTP, SIP TCP, DNS SRV, and CDP/LLDP, and support for InformaCast…

[computingpostcom]

In this guide, we will cover the installation and configuration of LibreNMS on CentOS 7 server with Nginx and optional Letsencrypt SSL certificate for security. What is LibreNMS? LibreNMS is a community-based GPL-licensed auto-discovering network monitoring tool based on PHP, MySQL, and SNMP. LibreNMS includes support for a wide range of network hardware and operating systems including Juniper, Cisco, Linux, Foundry, FreeBSD, Brocade, HP, Windows and many more. It is a fork of “Observium” monitoring tool. Features of LibreNMS Below are the top features of LibreNMS networking monitoring tool Has Automatic discovery – It will automatically discover your entire network using CDP, FDP, LLDP, OSPF, BGP, SNMP, and ARP API Access – LibreNMS provides a full API to manage, graph and retrieve data from your install. Automatic Updates – With LibreNMS you get to stay up to date automatically with new features and bug fixes. Customisable alerting – Highly flexible alerting system, notify via email, IRC, slack and more. Support for Distributed Polling through horizontal scaling which grows with your network Billing system – Easily generate bandwidth bills for ports on your network based on usage or transfer. Android and iOS application – There is a native iPhone/Android App is available which provides core functionality. Multiple authentication methods: MySQL, HTTP, LDAP, Radius, Active Directory Integration support for NfSen, collectd, SmokePing, RANCID, Oxidized Install LibreNMS on CentOS 7 with Let’s Encrypt and Nginx Follow steps provided here to have a running an operation LibreNMS monitoring tool on your CentOS 7 server. Ensure your system is updated and rebooted: sudo yum -y update sudo reboot After reboot set timezone and chronyd: sudo yum -y install chrony sudo timedatectl set-timezone Africa/Nairobi sudo timedatectl set-ntp yes sudo chronyc sources Put SELinux into permissive mode Run the commands below to put SELinux in Permissive mode: sudo setenforce 0 To persist the change, edit SELinux configuration file sudo sed -i 's/^SELINUX=.*/SELINUX=permissive/g' /etc/selinux/config cat /etc/selinux/config | grep SELINUX= Add EPEL repository to the system Enable EPEL repository on your system sudo yum -y install vim epel-release yum-utils Install required dependencies Install all dependencies required to install and run LibreNMS on CentOS 7: sudo yum -y install zip unzip git cronie wget fping net-snmp net-snmp-utils ImageMagick jwhois mtr rrdtool MySQL-python nmap python-memcached python3 python3-pip python3-devel Install PHP and Nginx PHP will be installed from REMI repository, add it to the system like below: sudo yum -y install http://rpms.remirepo.net/enterprise/remi-release-7.rpm Disable remi-php54 repo which is enabled by default, and enable repository for PHP 7.2 sudo yum-config-manager --disable remi-php54 sudo yum-config-manager --enable remi-php74 Then finally install required php modules sudo yum -y install php php-cli,mbstring,process,fpm,mysqlnd,zip,snmp,devel,gd,mcrypt,mbstring,curl,xml,pear,bcmath Configure PHP Edit PHP-FPM configuration file: sudo vim /etc/php-fpm.d/www.conf Set below variables user = nginx group = nginx listen = /var/run/php-fpm/php-fpm.sock listen.owner = nginx listen.group = nginx listen.mode = 0660 Set PHP timezone $ sudo vim /etc/php.ini date.timezone = Africa/Nairobi Install nginx web server Install Nginx web server on CentOS 7: sudo yum -y install nginx Start nginx and php-fpm service for i in nginx php-fpm; do sudo systemctl enable $i sudo systemctl restart $i done Install and Configure Database Server Install MariaDB database on your CentOS 7 server. curl -LsS -O https://downloads.mariadb.com/MariaDB/mariadb_repo_setup sudo bash mariadb_repo_setup sudo yum install MariaDB-server MariaDB-client MariaDB-backup sudo systemctl enable --now mariadb sudo mariadb-secure-installation Edit my.cnf file and add below lines within the [mysqld] section:

$ sudo vim /etc/my.cnf.d/server.cnf [mysqld] innodb_file_per_table=1 lower_case_table_names=0 Restart the MariaDB server after making the changes sudo systemctl restart mariadb Once the database server has been installed and running, login as root user: $ sudo mysql -u root -p Create a database and user: CREATE DATABASE librenms CHARACTER SET utf8 COLLATE utf8_general_ci; GRANT ALL PRIVILEGES ON librenms.* TO 'librenms_user'@'localhost' IDENTIFIED BY "Password1234!"; FLUSH PRIVILEGES; EXIT; Install and Configure LibreNMS on CentOS 7 If you want to use Letsencrypt SSL certificate, you need to first request for it. Run below commands as root user sudo yum -y install certbot python2-certbot-nginx Enable http port on the firewall if you have firewalld service running sudo firewall-cmd --add-service=http,https --permanent sudo firewall-cmd --reload Now obtain the certificate to use export DOMAIN='librenms.example.com' export EMAIL="admin@example.com" sudo certbot certonly --standalone -d $DOMAIN --preferred-challenges http --agree-tos -n -m $EMAIL --keep-until-expiring The certificate will be placed under /etc/letsencrypt/live/librenms.example.com/ directory Clone LibreNMS project from Github Add librenms user: sudo useradd librenms -d /opt/librenms -M -r sudo usermod -aG librenms nginx Clone LibreNMS project from Github: cd /opt sudo git clone https://github.com/librenms/librenms.git sudo chown librenms:librenms -R /opt/librenms Install PHP dependencies cd /opt/librenms sudo ./scripts/composer_wrapper.php install --no-dev A successful install should have output similar to below: .... Requirement already satisfied: typing-extensions>=3.6.4; python_version < "3.8" in /root/.local/lib/python3.6/site-packages (from importlib-metadata>=1.0; python_version < "3.8"->redis>=3.0->-r requirements.txt (line 3)) Installing collected packages: psutil, command-runner Running setup.py install for psutil: started Running setup.py install for psutil: finished with status 'done' Successfully installed command-runner-1.3.0 psutil-5.9.0 Copy and configure SNMP configuration template: Run the commands below in the terminal: sudo cp /opt/librenms/snmpd.conf.example /etc/snmp/snmpd.conf sudo vim /etc/snmp/snmpd.conf Set your community string by replacing RANDOMSTRINGGOESHERE com2sec readonly default MyInternalNetwork Download distribution version identifier script sudo curl -o /usr/bin/distro https://raw.githubusercontent.com/librenms/librenms-agent/master/snmp/distro sudo chmod +x /usr/bin/distro Then start and enable snmpd service sudo systemctl enable snmpd sudo systemctl restart snmpd When all is done, create nginx configuration file for LibreNMS Nginx configuration without SSL This is placed under /etc/nginx/conf.d/librenms.conf server listen 80; server_name librenms.example.com; root /opt/librenms/html; index index.php; charset utf-8; gzip on; gzip_types text/css application/javascript text/javascript application/x-javascript image/svg+xml text/plain text/xsd text/xsl text/xml image/x-icon; location / try_files $uri $uri/ /index.php?$query_string; location /api/v0 try_files $uri $uri/ /api_v0.php?$query_string; location ~ \.php include fastcgi.conf; fastcgi_split_path_info ^(.+\.php)(/.+)$; fastcgi_pass unix:/var/run/php-fpm/php-fpm.sock; location ~ /\.ht deny all; Nginx Configuration with SSL server listen 80; server_name librenms.example.com; root /opt/librenms/html; return 301 https://$server_name$request_uri; server listen 443 ssl http2; server_name librenms.example.com;; root /opt/librenms/html; index index.php; # Set Logs path access_log /var/log/nginx/access.log; error_log /var/log/nginx/error.log; # Configure SSL ssl_certificate /etc/letsencrypt/live/librenms.example.com/fullchain.pem;

ssl_certificate_key /etc/letsencrypt/live/librenms.example.com/privkey.pem; # Enabling Gzip compression on Nginx charset utf-8; gzip on; gzip_types text/css application/javascript text/javascript application/x-javascript image/svg+xml text/plain text/xsd text/xsl text/xml image/x-icon; location / try_files $uri $uri/ /index.php?$query_string; location /api/v0 try_files $uri $uri/ /api_v0.php?$query_string; # PHP-FPM handle all .php files requests location ~ \.php include fastcgi.conf; fastcgi_split_path_info ^(.+\.php)(/.+)$; fastcgi_pass unix:/var/run/php-fpm/php-fpm.sock; location ~ /\.ht deny all; Confirm nginx syntax: $ sudo nginx -t nginx: the configuration file /etc/nginx/nginx.conf syntax is ok nginx: configuration file /etc/nginx/nginx.conf test is successful If all looks good, restart the service sudo systemctl restart nginx Configure cron jobs sudo cp /opt/librenms/librenms.nonroot.cron /etc/cron.d/librenms Copy logrotate config LibreNMS keeps logs in /opt/librenms/logs. Over time these can become large and be rotated out. To rotate out the old logs you can use the provided logrotate config file: sudo cp /opt/librenms/misc/librenms.logrotate /etc/logrotate.d/librenms Set proper permissions sudo chown -R librenms:nginx /opt/librenms sudo chmod -R 775 /opt/librenms sudo setfacl -d -m g::rwx /opt/librenms/logs sudo setfacl -d -m g::rwx /opt/librenms/rrd /opt/librenms/logs /opt/librenms/bootstrap/cache/ /opt/librenms/storage/ sudo setfacl -R -m g::rwx /opt/librenms/rrd /opt/librenms/logs /opt/librenms/bootstrap/cache/ /opt/librenms/storage/ Start LibreNMS Web Installer Open http://librenms.example.com/install.php on your web browser to finish the installation. Confirm that all Pre-Install Checks passes and click “Next Stage” Configure Database credentials as created earlier. It will start to import database schema and populate data. On the next page, you’ll be asked to configure admin user account. Username: admin Password: StrongPassword Next is the generation of the configuration file, you may have to create the file manually with the contents given if it fails to create. The file path should be /opt/librenms/.env. $ sudo vim /opt/librenms/.env # Database connection settings DB_HOST=localhost DB_DATABASE=librenms DB_USERNAME=librenms_user DB_PASSWORD=Password1234! Change ownership of the file to a librenms user: sudo chown librenms:librenms /opt/librenms/.env Click “Finish Install” button to complete LibreNMS installation on CentOS 7 You should be greeted with an admin login page. Login and select Validate Installation We also have other monitoring tutorials around Zabbix, Grafana, Prometheus, and InfluxDB.

[karonbill]

ACNT Certification HPE3-U01 Dumps

Are you worried about your preparation for the HPE3-U01 Aruba Certified Network Technician (ACNT) Exam? PassQuestion offers you Aruba Certified Network Technician (ACNT)  HPE3-U01 Dumps where you can test your skills for taking the HP HPE3-U01 exam. It will give you a real exam scenario to show you the format of the actual Exam. The Aruba Certified Network Technician (ACNT)  HPE3-U01 Dumps contain real questions and answers from the syllabus of the HPE3-U01 exam. These HPE3-U01 exam questions and answers cover all the topics to help you understand the HPE3-U01 exam with ease. These Aruba Certified Network Technician (ACNT)  HPE3-U01 Dumps are enough for you to pass the HPE3-U01 exam in one go with excellent marks.

Why earn this Aruba Certified Network Technician (ACNT) certification?

Create a strong foundation of knowledge on wired and wireless networking technologies on which you can build your networking expertise.

Position yourself as a trusted network technician who can: perform numerical conversions, analyze packets and do an initial switch setup, configure VLANS and 802.1Q, configure IPV4 routing, deploy a WLAN, and monitor a WLAN and wireless client.

Start your career as an Aruba Certified Network Technician who understands and can implement a modern networking solution to meet the challenges cloud, mobility, and the intelligent edge bring.

Exam Information

Exam ID: HPE3-U01 Exam type: Web based Exam duration: 1 hour 30 minutes Exam length: 60 questions Passing score: 73% Delivery languages: English

Exam Objectives9%   Network Fundamentals

Defining networking, LAN, WAN and their components

Explain Different Media type

Compare Unicast, Multicast, and Broadcast

Convert Numbering Systems/ Numerical Conversion

20%    Network Communications Model

Explain OSI model layers

Describe the encapsulation process and headers

Explain the TCP 3-way handshake

Describe how common L2 to L7 protocols works

Common Networking Services- DHCP, DNS, HTTP, SSH, FTP, LLDP, ICMP

18%    Networking Devices

Switches

Routers

Multilayer switches

AP

Wireless Router

OOBM

Switch interfaces

Aruba OS-CX Network Operating System- CLI contexts,

Show Commands

Basic config    

12%    L2 Switching

Compare and describe Collison and Broadcast domains

Describe L2 devices

Describe MAC address and ARP forwarding tables

Explain MAC table-based switching

Describe VLANs

Explain and avoid L2 loops

9%    Internetwork Communication

IP Addressing

Default Gateway

IP Routing

Inter-VLAN routing process

IPv6 address describe

23%    WLAN Fundamentals

801.11 standards and amendments

RF Communications – RF signal propagation

RF Channels

Interference ACI & CCI

RF design basics

Antenna usage and fundamentals

RF transmit power levels

WLAN Mobility and Roaming

Management and control frames

802.11 Header

9%    Deploying WLANs with Central

Network Device planes

Differentiate between local and server-based mgmt.

Aruba Central as a Cloud-Based Mgmt platform

Central requisites and communication to AP

Stages of the Central wizard to deploy a WLAN

View Online Aruba Certified Network Technician (ACNT) HPE3-U01 Free Questions

Which protocol performs name to IP resolution? A.DHCP B.FTP C.DNS D.LLDP Answer: C

What do the digits in the ArubaOS-CX switch interface numbering represent? A.Member/Slot/Port B.Slot/Member/Port C.Stack/Member/Port D.Module/Slot/Port Answer: C

What is the goal of the TCP three-way handshake? A.To notify the destination who the originator is. B.To acknowledge the reception of the segments. C.To establish a reliable, flow-controlled connection. D.To notify the number of segments that will be sent. Answer: C

Which protocol provides frame delivery using physical addressing and error detection using frame check sequence? A.Link Layer Discovery Protocol B.Ethernet C.TCP/IP D.User Datagram Protocol Answer: A

What are valid configurable "Client VLAN Assignment" options for a Bridge-based WLAN in Aruba Central? (Select three.) A.native VLAN B.automatic VLAN C.hybrid VLAN D.static VLAN Answer: D

Which statements are true about Access Points? (Select two.) A.They use destination IP addresses to switch the packets. B.They bridge wireless frames to the wired network. C.They are used to interconnect wireless devices only. D.They offer wireless connectivity to endpoints. E.They only operate at Layer three of the OSI model. Answer: A, D