Routing and Switching

How to – Juniper EX/QFX Layer 3 Switch Configuration

This post is to list the basic configuration for the Juniper EX/QFX Layer3 switch. Similar to the previous Cisco Layer 3 configuration, it will demonstrate the most used configurations based on the production deployments. Related Topic: How to – Juniper EX switch Virtual Chassis and JUNOS upgrade https://ictfella.com/juniper-ex-switch-virtual-chassis-stacking-and-junos-upgrade/ How to Configure Cisco Layer 3 Switch …

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

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 Revert the Fortinet Firewall Configuration back Automatically when Handling Changes Remotely

When network professionals handle changes remotely, it is always good to have a safety net available. If you are familiar with Juniper Junos, you would love the “commit confirmed” command very much, as it will revert the config back to the previous config after 10 minutes automatically, in the event of you screwed up the …

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How to Fix Cisco 4331 Router Throughput Stuck at 100Mbps

=====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 enable IGMP Snooping on dedicated VLAN on Planet GS-6320 Switches – obsolete error

This post lists the fix for “% ‘ip igmp snooping vlan ‘ is obsolete” error when configuring Planet GS-6320 switches. ====Background==== We are working with a multimedia partner to set up an IPTV system and come across this particular error when we try to enable IGMP Snooping on a VLAN. After the partner contacted Planet …

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Stackwise Virtual “Invalid Input Detected” Error and How to Configure Stacking on Cisco 9500

This post is to demonstrate the process to fix the “Invalid Input Detected” error when issuing “stackwise-virutal” command on Cisco switches, as well as document basic StackWise virtual configuration using two Cisco Catalyst 9500. Error Fix StackWise Virtual error You will get this error because you don’t have the Network Advantage license purchased, you may …

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How to Configure Zscaler GRE Tunnel with Cisco ISR for Internet Security

This post is to illustrate the process of configuring the Zscaler GRE tunnel with Cisco ISR for cloud internet security. The main goal of this configuration is to set up the GRE tunnel and send all internet traffic via the tunnel for web filtering, when Tunnel is not available, traffic falls back to the standard …

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