Networking Knowledge Base

In preparing for CiscoLive! in San Diego, I am provisioning our access layer 3560-E switches.  Since things have a tendency to change a lot at an event like CiscoLive! I thought it would be best to make sure our port descriptions are always up-to-dat...

Core IssueThis issue can be hardware or software related.ResolutionThis type of crash does not clearly indicate a hardware or a software failure. Occasionally, this problem may occur once and not recur. If you have the output of a show stacks or show...

How to upgrade Cisco IOS from Serial Port In this topic, i will show how to upgrade Cisco IOS from the Serial Port using a console cable and Hyper Terminal without network connectivity (that would be needed for TFTP, in example). We will be using a ...

Core issueThe error message looks similar to this example:%SW_DAI-4-DHCP_SNOOPING_DENY: 1 Invalid ARPs (Res) on Fa0/17, vlan 252.([xxxx.xxxx.xxxx/10.10.252.4/xxxx.xxxx.xxxx/10.10.252.254]Note: The xxxx is the MAC address of the sender.The default mes...

we encounter a question，pls thank for your assistant！dual 93180 with vPC，they portchannel to huawei switch，globally enable bpduguard default on 93180，and configured edge port。we found out that all of ports within portchannel changed down（channel errd...

[Available Now]Cisco DNA Center version 2.2.2.x Upgrade now to Cisco DNA Center version 2.2.2.x to experience features and improvements that will:Drive AdoptionNew intelligence provides an easy, gradual, and complete adoption of SD-Access. Faster Cis...

Hi,  Can anyone provide me cisco packet tracer 7.0. thanks in advance  Lalit 

Table of Contents Table of ContentsSummaryConfiguration StepsVerificationCertificate Signing Request Using OpenSSLCertificate On SwitchCertificate Using OpenSSLReferences   Summary Certificates are a passion of mine. enuf said. The introduction of t...

Table of Contents Table of ContentsSummaryPKI Terms \ DefinitionsPKI File TypesConfiguration StepsGenerate a Key PairEnrolling - Creating the Trustpoint and displaying the Certificate Signing RequestAuthenticating - Informing the device about the Ce...

Review the Slides Join the Discussion Watch the Video IntroductionFeatured ExpertsQ: So, SD-WAN functionality remains more or less the same?Q: Is there an equivalent replacement for the vedge1K? With 8 Ethernet ports and dual PS?Q: How does the autom...

  Cisco SD-Wan and AWS services deliver a powerful solution that will help the customers to achieve more goals with very efficiency including the Unified management, Automation , Secure cloud platform , as we see most of the IT transform to the clou...

  Table of Contents Table of ContentsSummarySupportConfiguration StepsInstall a Certificate on the Catalyst SwitchInstall a Certificate on the SYSLOG serverConfigure the Cat 9K for SYSLOG TLSOptional Configure Specific Cipher SuitesVerificationCat ...

Problem Description:This document is about the most common cause of the CRIT Error LED on the ASR1000 platform. In practice this error is usually encountered when the router is being configured for the first time and the connections have been configu...

DocumentationPrerequisites and disclaimersDownload Software imagesConfiguring Security TemplateApplication Firewall PolicyIntrusion PreventionURL-FilteringAdvanced Malware Protection (AMP/TG)DNS/web-layer SecurityPolicy SummaryAttach the security pol...