Cisco Catalyst 3850 Data Stack and Power Stack
Received a bunch of boxes for Cisco 3850, which will be used to build a switch stack for high availability switching environment. For 2960 series, there is previous post about…
Cisco Catalyst 2960X and 2960S Stacking
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…
Cisco Wireless LAN Controller Redundancy Solutions: High Availability
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…
Cisco Switch 2960x Memory Increasing Issue Troubleshooting – Memory Leak
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…
Cisco Free Lab Website – dCloud
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 Active Advisor – CAA
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…
Cisco ASA Tips and Tricks – 5500-X Series Software 9.x Configuration Notes
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…
Native VLAN mismatch Error on Access Port
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…
Cisco CCP Installation and Basic Configuration
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…
Recover Cisco Device using TFTP Server or External Card from a Corrupt or Missing Image or in Rommon Mode
Cisco Switch usually is quite robust and not give me hard time. When it happens, it happens. What I met is a situation Cisco 4500 switch got into Rommon mode…
Windows Network Policy Server Basic Radius Configuration for Cisco devices
RADIUS Traffic RADIUS server configuration on Cisco IOS is performed in two steps, one set of commnads are defined within the AAA paradigm and other set is run with the…
Password Recovery for Cisco Router 2900
I have to reset one Cisco 2901 router to factory default. Unfortunately no one knows user name and password. Cisco documentation Password Recovery Procedure for the Cisco 2900 Integrated Services…