Apuntes

  DHCP conflict logging: the true story The on-line configuration help for the ip dhcp conflict logging configuration command ( logging: Record address conflicts in a log file ) is one of the more misleading texts I've found in Cisco IOS (and the CCO documentation is not much better). Here's how it actually works ... If you have configured ip dhcp ping parameters (highly recommended), the router will ping the IP address it intends to allocate to a client before replying to the DHCP request. If the router receives ICMP Echo Reply message (response to ping), the address is obviously in use. If the DHCP conflict logging is enabled (default), the router will log the conflict with a syslog message (not in a separate log file) and put the address on the list of conflicts. The addresses on that list (displayed with show ip dhcp conflict ) are not used in the future (similar to the addresses configured with the ip dhcp excluded-addresses command). To reuse a conflictin...

Ubiquiti UniFi – Ejecute el controlador como un servicio de Windows CopyRigth : http://soporte.syscom.mx/es/articles/1743759-ubiquiti-unifi-ejecute-el-controlador-como-un-servicio-de-windows Redactado por Nancy Covarrubias Alarcon Actualizado hace más de una semana Los lectores aprenderán cómo ejecutar el software del controlador UniFi como un servicio de Windows. Los servicios de Windows suelen ser útiles ya que son aplicaciones de “fondo” que no requieren atención del usuario final. De esta forma, el servicio se lanzará al inicio, sin intervención del usuario. El servicio es un reemplazo / sustituto directo para ejecutar el programa del controlador manualmente (a través del ícono o una tarea programada), por lo que no es necesario ejecutar la aplicación del controlador si lo está ejecutando como un servicio de Windows. Tabla de contenido Pasos: cómo ejecutar el controlador como un servicio de Wi...

Configuring Clients Manual for 802.1X and Meraki Authentication   Copyrigth : https://documentation.meraki.com/MR/Encryption_and_Authentication/Configuring_Clients_for_802.1X_and_Meraki_Authentication Windows 10 The following steps will configure a Windows 10 client to use 802.1X with Meraki Authentication (NOTE:  these are instructions for the 802.1X with Meraki Authentication only.  Customer-based RADIUS server configuration requirements are specific to the customer's own RADIUS server and can vary widely): Click the "Start" menu Navigate to Settings (Gear Icon) > Network & Internet > Wi-Fi > Manage Known Networks Click 'Network and Sharing Center' Select 'Set up a new connection or network' Select 'Manually connect to a wireless network' Enter the SSID name in the 'Network name:' field Select 'WPA2-Enterprise' in the 'Security type:' drop down Select your encryption type from the 'Enc...

Configuring an EX2200 Virtual Chassis (CLI Procedure) date_range 23-Sep-19 info_outline Platform and Release Support You configure an EX2200 Virtual Chassis by configuring interfaces connecting EX2200 switches into Virtual Chassis ports (VCPs). Optical interfaces on EX2200 and EX2200-C switches can be configured into VCPs and can be used to connect EX2200 switches into a Virtual Chassis over short and long distances (up to 49.7 miles). All RJ-45 interfaces, including built-in network ports with 10/100/1000BASE-T Gigabit Ethernet connectors and 1000BASE-T RJ-45 transceivers, on EX2200 and EX2200-C switches can also be configured into VCPs. An EX2200 Virtual Chassis can be configured with either: A preprovisioned configuration—You can deterministically control the member ID and role assigned to a member switch by tying it to its serial number. A nonprovisioned configuration—The master sequentially assigns a member ID to other member switches. The role is dete...

Monitoring Services With WMI Learn how to Monitor Services using WMI Suggest Edits copyrigth : https://knowledge.opsview.com/v5.3/docs/monitoring-services-with-wmi   Windows Management Instrumentation Configuration To use Opsview Monitor's 'Agentless' Windows checks, a user account that has access to Windows Management Instrumentation data counters is required. There are two methods to accomplish this. Create a standard Administrator account. Configure a restricted user that is only allowed access to standard user functions and WMI performance counters. Creating an Administrator account solely for the purpose of monitoring may lead to security concerns, hence the outlined instructions on how to create an appropriate privileged user below. Configuration Our guide will implement three core tasks. The account will need access to 'DCOM'. This is the facility used to execute WMI queries. The account will need access...

Verifying That MAC Accounting Is Working date_range 16-Dec-18 info_outline Platform and Release Support    copyrigth https://www.juniper.net/documentation/en_US/junos/topics/task/verification/mac-accounting-l2.html   Purpose Verify that MAC accounting is enabled and the system is counting packets and collecting statistics. Action Verify that MAC accounting is enabled. user@switch> show ethernet-switching table content_copy zoom_out_map MAC flags (S - static MAC, D - dynamic MAC, L - locally learned SE - statistics enabled, NM - non configured MAC, R - remote PE MAC) Routing instance : default-switch Vlan MAC MAC Age Logical name address flags interface VLAN101 88:e0:f3:bb:07:f0 D,SE - ae20.0 MAC flags (S - static MAC, D - dynamic MAC, L - locally learned SE - statistics enabled, NM - non confi...

  Switch boots from backup root partition after file system corruption occured on the primary root partition   Copyright Summary: This article describes the issue when an EX Switch booting from the backup root partition after a file corruption occured on the primary root partition. Symptoms: EX switches running Junos 10.4R3 or later have added resiliency based on the "resilient dual-root partition", which if the switch detects a corruption on the primary root file system, it boots from the alternate root partition. When this occurs, you are notified in two ways: Alarm and Warning Banner Alarm: The following alarm message is generated: user@switch> show chassis alarms 1 alarms currently active Alarm time Class Description 2011-02-17 05:48:49 PST Minor Host 0 Boot from backup root Warning: **************************************************************************************** ** ** ** WARNING: THIS DEVICE H...