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Posts published in “Cisco”

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…

Cisco Free Lab Website – dCloud

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Cisco dCloud has been moved to version 1.5 , now it is at version 2. Cisco dCloud lab as a service platform provides self-service training, demonstration and lab capabilities for Cisco partners. Learn about this free 24/7/365 resource which provides multiple labs in all Cisco architectures, plus documentation and instructions for conducting on-site demonstrations. For anybody to sell/buy/use Cisco products,…

Cisco Active Advisor – CAA

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Cisco Active Advisor is a free online cloud service that automates network discovery and analysis of your network inventory. Cisco Active Advisor reduces the overall risk of your network administration by keeping you up-to-date on: Warranty and service contract status Product advisories, including Product Security Incident Response Teams (PSIRTs) and field notices End-of-life milestones for hardware and software Cisco Active…

Cisco ASA Tips and Tricks – 5500-X Series Software 9.x Configuration Notes

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This post is using Cisco ASA 5515-X with software version 9.1(2) as configuration example. Here are some basic steps I recorded during configuring it. Related posts in this blog: Cisco ASA 5500-X Series Software 9.x Configuration Notes (Tips and Tricks) Cisco ASA Remote Access VPN Configuration 2 – Anyconnect VPN Configuration Cisco ASA Remote Access VPN Configuration 1 – Clientless…

Native VLAN mismatch Error on Access Port

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Cisco switches always have VLAN 1 as the default VLAN, which is needed for many protocol communication between switches like spanning-tree protocol for instance. Unfortunately you can’t change or even delete the default VLAN, it is mandatory. The native VLAN is the only VLAN which is not tagged in a trunk, in other words, native VLAN frames are transmitted unchanged. Per…

Cisco CCP Installation and Basic Configuration

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Cisco Configuration Professional (Cisco CP) is a GUI based device management tool for Cisco access routers. This tool simplifies routing, firewall, IPS, VPN, unified communications, WAN and LAN configuration through GUI based easy-to-use wizards. It has been used to replace obsolete SDM (Security Device Manager) product. Cisco Configuration Professional offers smart wizards and advanced configuration support for LAN and WAN interfaces,…