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Posts published in “Cisco”

Configure Cisco Enterprise Access Point 1142N As Home AP

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Early of 2018, I got a chance to buy a Cisco Wireless Access Point with only $30, which is a great deal for AIR-LAP1142N-x-K9 – Dual-band Controller-based 802.11a/g/n. It is not 802.11ac ready AP, but as a replacement for my home wireless router, it is already enough. Since this device is enterprise product, the configuration is not that straightforward, even…

Cisco ACI (Application Centric Infrastructure) Lab Test Drive

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Summary: ACI is an open-source, centralized policy model that connects to all components of the data center and controls the network and information flow. ACI is a principle of action by the business, synonymous with code and system. A policy is a state of intent that is applied to the network, with the network being responsible for carrying out that…

Cisco 3850 Mgmt VRF Configuration

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Ethernet Management Interface VRF New Cisco Routers and Switches come with a dedicated Ethernet port which unique purpose is to provide management access to the device via SSH or Telnet. This interface is isolated in its own VRF called “Mgmt-vrf’. Placing the management Ethernet interface in its own VRF has the following effects on the Management Ethernet interface: Many features must be…

Upgrade Cisco 4500 Switches IOS and ROMM and Failed to Enable VSS (Virtual Switching System)

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In one of my clients environment, there are two Cisco 4510 running and HSRP has been configured. It has been discussed to upgrade it to VSS (Virtual Switching System) during last a couple of months. The main driven to get VSS is to have dual homed hosts run Etherchannel to connect to those two 4510R+E switches. Obviously converting the core switches…

Cisco Catalyst 2960X and 2960S Stacking

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Working on stacking two Cisco 2060X switches recently, and two 2960X Stack module and 0.5m stacking cables received today. Product name is C2960X-STACK= and description is Catalyst 2960-X FlexStack Plus Stacking Module optional. Part Number is CMUCAEGBAA. For 3850 switches, it is in this post: Cisco Catalyst 3850 Data Stack and Power Stack

Cisco Wireless LAN Controller Redundancy Solutions: High Availability

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There are two options for Cisco Wireless Controller redundancy solutions, either Backup Controllers or High Availability, depending on the firmware version of WLC’s, failover time requirement, and budget. Using Backup Controller method, a single controller at another location can act as a backup for access points when they lose connectivity with the primary controller in the local region. Centralized and…

Cisco Switch 2960x Memory Increasing Issue Troubleshooting – Memory Leak

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Symptoms¬† Our network monitoring software found memory usage on some new production switches keep increasing. Those switches are Cisco 2960X and coming with 15.0(2) EX3 IOS. As we know there are two types of memory in Cisco IOS: process memory and IO memory. When a feature is enable on an IOS device (e.g. PIM, HSRP, and etc), IOS allocates process…