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Install Mac OSX AnyConnect Package on Cisco Router

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Symptoms:  One of my clients reported a Cisco AnyConnect issue. It only happened to his machine and later we found that is because he is using Mac machine. His credential works fine if he uses it at windows machine. From following screenshot, obviously there is Mac AnyConnect package missing from vpn gateway. Error Messages: “VPNThe AnyConnect package on the secure…

Juniper SRX DB mode (Debug mode)

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During our regular maintenance, after rebooted one SRX345, and found it stuck at db mode, which is debug mode. After a short and quick analysis, I found Juniper JunOS devices may get stuck in the boot process or fail to boot the OS, in rare cases, after a sudden power loss or ungraceful power shut down. Juniper  routers, switches and…

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

Launch and Access Amazon AWS EC2 Instances

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Amazon Web Services (AWS) is a secure cloud services platform, offering compute power, database storage, content delivery and other functionality to help businesses scale and grow. Millions of users are currently leveraging AWS cloud products and solutions to build sophisticated applications with increased flexibility, scalability and reliability. In this post, I recorded all steps regarding how to launch a free…

Creat AWS Diagrams Online

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I was looking for some online tools to create impressive AWS diagram for my learning process. Most of online diagram websites provide certain free usages. Here are some websites I found useful to me.   1. AWS 3D Diagram from Cloudcraft.co It is quite impressive when I started to make my first diagram. Limit grid size is a big pain…