Cisco - ICT Fella

How to Back up Cisco Switch Router Automatically to FTP Server

This post is to demonstrate the process to configure the Cisco switch or router device to back up the Cisco configuration file automatically to the FTP server. Environment Cisco Catalyst 9000 switch, works on Cisco routers as well Server: Microsoft Windows Server 2022 FTP application: Filezilla Server Application Configure Filezilla FTP server Assume you have […]

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How to – Spanning Tree Protocol (STP) between Cisco and Juniper Switches

Routing and Switching

This post is to list the compatible Spanning Tree Protocol (STP) configuration between Cisco Catalyst switches and Juniper EX/QFX switches. The honest opinion here is to use EtherChannel/Aggagated Ethernet (LACP) wherever you can to avoid layer 2 network loops. Environment/Default Configuration Cisco Catalyst switch uses its own Rapid-PVST (Per VLAN Spanning Tree) protocol by default

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How to Configure Basic Bandwidth Shaping Policing on Cisco Fortigate for ISP Connection

Next Gen Firewall, Routing and Switching

When Internet Service Providers (ISP) have a new internet link provisioned, very often they have shaping rules on their NTU to regulate internet traffic at promised rate. If your firewall/router/switch is sending excessive traffic than promised rate, the packet will be dropped, then ends up with suboptimal performance and slow internet speed. This post is

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How to Fix Cisco 4331 Router Throughput Stuck at 100Mbps

Routing and Switching

=====Issue==== After ISP upgraded the link from 100Mbps to 350Mbps, the customer cannot get the speed of 350Mbps, checked all paths and confirmed there is NO QoS, Policing, or bandwidth limiting setting anywhere along the way. Tested directly using a laptop with direct public IP and NO issue. ====Environment==== Cisco 4331 Router with 350/350 Mbps

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How to Configure Cisco Layer 3 Switch

Routing and Switching

This post is to list out the basic configuration on a Cisco Layer 3 Switch, if you are configuring a Layer 2 Switch, you can simply remove the additional SVIs except for the switch management VLAN. Host Name and Enable Password Encryption Enable 3rd Party SFP Module Support Domain and DNS Configuraiton Enable Link Layer

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Cisco IOS Upgrade -Image Failed Digital Signature Verification

Routing and Switching

This is post is to list out the IOS upgrade procedure for legacy Cisco Switches or low-end Cisco switches, it also lists out the fix if you encounter the “Image failed digital signature verification” error. Please be aware of the difference in upgrade command between Cisco legacy switches and newer 9000 series switches. For the

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How to Troubleshoot Cisco Voice CUBE Debug

MS Teams & Collaboration, Routing and Switching

Object Troubleshooting voice issue can be painful if you don’t know where to look, luckily the majority of the products on the market has the right tool to analyze the call flow and assist in troubleshooting, This post is to show you the very basic command to troubleshoot on a Cisco Voice Router / CUBE.

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How to Configure Cisco Juniper Fortinet EtherChannel LACP

Routing and Switching

Object When it is coming to project execution and solution integration, ICT network professionals always have the challenge to interconnect multiple vendors together, it is not difficult but painful to deal with. This article is to show you the typical EtherChannel configuration examples when you try to interconnect them across multiple vendors: Cisco and Juniper

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Cisco Voice URL Voice Routing dial-peer

MS Teams & Collaboration, Routing and Switching

Requirement The issue arises when the customer wanted to “share” the number across two different voice systems, such as CUCM and Teams. There are multiple ways to integrate 2 systems under the same range, but it becomes challenging when users want to keep their original numbers, while some of them will stay on CUCM, some