Networking Knowledge Base

The Cisco Document Team has posted an article. This document describes how to use iPerf on Catalyst 9000 series switches to perform bandwidth tests. Know of something that needs documenting? Share a new document request to doc-...

The Cisco Document Team has posted an article. This document describes sample configurations for commonly used IP Access Control Lists (ACLs), which filter IP packets. Know of something that needs documenting? Share a new docum...

Core Issue: Timestamps are useful for viewing when certain events happen on a router. Timestanps are also helpful for troubleshooting, because they allow the network administrator to compare simultaneous events on network routers and analyze whether ...

The Cisco Document Team has posted a video. This video describes the auto-upgrade procedure required when installing a second supervisor engine in a C9600 product. Know of something that needs documenting? Share a new document ...

The Cisco Document Team has posted an article. This document describes how to validate Layer 2 hardware programming and forwarding on Catalyst 9400 Series switches. Know of something that needs documenting? Share a new document...

The Cisco Document Team has posted an article. This document describes common methods to troubleshoot power supplies on Catalyst 9000 series switches. Know of something that needs documenting? Share a new document request to do...

Important: I am not a FPGA advanced, and I just wanna provided a humble Josinfo #ccieofpeople reflection.The Field Programmable Gate Array as know as FPGA, often used in data centers / financial environment have approximately 12,300 DSP (digital sig...

The Cisco Document Team has posted an article. This document describes how to identify, collect useful logs, and troubleshoot problems that can occur with Port Flaps on Catalyst 9000 switches. Know of something that needs docum...

The Cisco Document Team has posted an article. 5 - Notice Self-recovery, no service impact. The device may report envmon minor 'ALTITUDE Sensor: Invalid sensor read error' sporadically. Know of something that needs documenting?...

SymptomsFactory reset the switch (running IOS 16.06.05) to default settings.SolutionPower cycle the switch (make sure console cable is connected). Press the Mode button multiple times (that's what worked for me) until the console shows this:Switch: A...

The Cisco Document Team has posted an article. This document describes the use of banner feature templates for the generation of banner and message of the day (MOTD) text blocks in Cisco IOS® XE. Know of something that needs do...

The Cisco Document Team has posted an article. This document aids customers to find a stable software release for Catalyst 2960/3560/CDB/4500 and Catalyst 6500/6800 switches. Know of something that needs documenting? Share a ne...

The Cisco Document Team has posted an article. This document describes basic concepts needed to understand how MST works in a topology with either PVST or other regions Know of something that needs documenting? Share a new docu...

HSRP TrackingTracking is only for HSRP to detect some changes in the routing table. HSRP is not a real routing protocol it just provides a default gateway at Layer 2 and Layer 3.Interface tracking allows you to specify another interface on the router...

IntroductionPrerequisitePre-Migration TaskvManagevBondvSmartMigration ActivityUpgrade vManageUpgrade vBondUpgrade vSmartPost ValidationvManagevBondvSmartRollback ActivitiesvManagevBondvSmart   Introduction This document provides step-by-step procedu...