This post is to document the process to migrate DHCP service from Windows Server 2016 to Windows Server 2022, as well as the related DHCP Failover and DHCP Forwarding/IP-helper configuration. Microsoft’s DHCP services haven’t changed much in the past 20 years, it would be a similar procedure if you are using the old version such […]
How to Migrate DHCP Service from Server 2016 to Server 2022 Read More »
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
Cisco IOS Upgrade -Image Failed Digital Signature Verification Read More »
Object We recently purchased a couple of FS.com S5810 switches, after some testing, troubleshooting, we get them working and this post is to document the configurations conducted during the process. Configuration examples such as Virtual Switch Link, LACP, DHCP server, etc may help some people if you are struggling. Those Switches’ CLI is very much
How to configure FS S5810 switch stacking LACP DHCP Read More »
Object This post is to show you the way to configure VLANs on Ubiquiti Nanostation and demonstrate how to trunk the VLANs using over Point to Point Wireless. Ubiquiti Nanastations are very commonly used by customers when it is not feasible to connect two locations via fibre or the physical distance is over 100M for
Ubiquiti Nanostation – How to Configure VLAN Trunking Read More »
Object Juniper VLAN Number Rewrite is very useful when you are executing a network transition project, scenarios can be you are trying to use the same subnets on both new and old environments, or the ISP gives you a VLAN number that overlaps your VLAN number in your current network. Solution The below example shows
How to Rewrite VLAN Number on Juniper EX Read More »
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.
How to Troubleshoot Cisco Voice CUBE Debug Read More »
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
How to Configure Cisco Juniper Fortinet EtherChannel LACP Read More »
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
Cisco Voice URL Voice Routing dial-peer Read More »
This tutorial is to illustrate the processes to configure Juniper EX switch virtual chassis and JUNOS upgrade procedures. This is one of the most common tasks in the Juniper networking world. Environment Virtual Chassis with nonprovisoned configuration file 2. Then you can check the current vc-port configuration via show virtual-chassis vc-port, there might be ports
How to – Juniper EX switch Virtual Chassis and JUNOS upgrade Read More »
Cisco unsupported SFP Errdisable port
How to fix Cisco SFP errdisable state gbic-invalid Read More »
