This post is about fixing Cisco C9200L-24P uplink Issue on IOS version 17.3.4b. Issue and Environment 1x Cisco 9200L-24P with 4x 10G SFP module Cisco 10G SFP uplink to another Cisco Core Switch IOS version is 17.3.4b on Cisco 9200L-24, it was the “recommended” version on Cisco website before Physical link between Cisco 9200L-24P and …
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This post is to document the process of migrating VMware Standard Switch to Distributed Switch. The purpose of this change is to enable LACP on both VMware Hosts and Core/Top of Rack Switch. Environment Three-node cluster connected to Two-Switch stack with redundant connection for each switch On each switch port, it is configured with standard …
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This post is about using iPerf to test link speed/bandwidth under windows environment. Environment 1 x Point to Point (MPLS) link provided by ISP 2 x Windows Server 2022 Server 64bit on each side of the link, Windows 10/11 will do the job as well iPerf3 downloaded on both Windows Servers from iPerf official link …
This post is to document the process to configure DHCP option 119 in Windows DHCP Server and Cisco Switch. Environment Windows Server 2022 Domain Controller with DHCP roles configured Windows 10 devices on the end user side Multiple Domains with two-way trust configured DNS Suffix needs to be configure for both domains: ICTFella.com and DomainAA.com …
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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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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 …
How to – Spanning Tree Protocol (STP) between Cisco and Juniper Switches Read More »
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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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 …
How to Configure Basic Bandwidth Shaping Policing on Cisco Fortigate for ISP Connection Read More »
Eve-NG is the most used network emulation software for network professionals. Similar to Webiou or Unetlab in the older days, you can create virtual network devices for the majority of the IT networking vendors in a simple web GUI. This post is to demonstrate how to simulate or configure the Internet in the EVE-NG lab …
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 …
