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 Microsoft Teams Directing Routing enables you to connect a supported Session Board Controller (SBC) to the Microsoft Phone system, there are multiple vendors that offer Microsoft Certified SBC solutions such as Audiocodes, Ribbon, and even Cisco CUBE. The below examples lists the common issues when implementing Audiocodes SBC using direct routing. 1. Communication issue
Microsoft Teams Direct Routing Common Issues Read More »
Issue At the end of Microsoft Teams migration – Skype for Business decommissioning process, we were trying to set up the global TeamsUpgradePolicy to “TeamsOnly”, we got this error “This organization cannot be upgraded to TeamsOnly at the Tennant level because this is an on-premise deployment of Skype for Business detected in 1 or more
How to fix This organization cannot be upgraded to TeamsOnly 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 »
Background This post is to demonstrate the simplest way to set up your personal Weather Forecast Email Service using basic Linux Bash Scripts and Cron job. You can put scripts on your VPS, your Rasberry PI, or any other form of Linux server. Environment Operation System: Operating System: CentOS Linux 7 (Core) Kernel: Linux 3.10.
Linux Bash Script Weather Forecast Email Service Read More »
Object IPtables is probably one of the most useful tools widely integrated into the majority of the Linux Distributions, this article is to share the iptables used on my VPS in the past 7-8 years. I have hosted my personal Asterisk PBX in the VPS so I can make international calls via Twilio SIP Trunk.
Iptables example on CentOS Asterisk Read More »
Issue After initially setting up the Fortigate 100F HA cluster, we got this annoying “out-of-sync” error, dug into it, and found several issues related to the Fortinet firmware version and initial configuration differences. This post is to document the process of troubleshooting and some of the configurations for the Fortinet HA firewall cluster. Environment 2x
Fortigate HA Cluster Out-of-Sync 100F 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 »
It is common when a business acquisition or merging occurs, to IT professionals, we would automate our task via scripting rather than going through each user’s properties and changing everything, the below simple scripts may help when you want to “bulk change” domain name, UPN, Email Attribute, Primary SMTP, SIP address in a Hybrid environment:
How to – Domain Name UPN Email Primary SMTP SIP Change Read More »
