Cisco device serial number explanation

Cisco devices have a standard serial number, from the serial number you can work out it's age and the location it was built. To decipher the serial number, here's how it is composed. Cisco S/N format is LLLYYWWXXXX. LLL = Location code (i.e. FOC = FoxConn China) YY = Year code (08 = 2004...09=2005...etc...) WW … Continue reading Cisco device serial number explanation

SPAN Configuration Examples

Configuring Simple SPAN session Make sure the destination interface is configured with command: # switchport monitor C2950#configure terminal C2950(config)# C2950(config)#monitor session 1 source interface fastethernet 0/2 destination interface fastethernet 0/3 no shut end C2950(config)#show monitor session 1 STATE SHOULD SHOW UP. Other Configuration Examples for SPAN This section includes the following topics: Configuration Example for a … Continue reading SPAN Configuration Examples

CheatSheet: Brocade Commands

Here is just a reference for people to have a quick look and search. The list of  Brocade SAN Switch CLI commands() version Kernel:     2.6.14.2 Fabric OS:  v7.1.0c Made on:    Tue Apr 16 18:06:01 2013 Flash:        Wed Dec 11 16:18:22 2013 BootProm:   1.0.10 aaaconfig                  Configure RADIUS for AAA services ad                         Specifies all administration domain … Continue reading CheatSheet: Brocade Commands

How to reset password on HP Aruba 2540 / 2500-series switches

If you forgot your login credentials to your Aruba or HP Switch without doing the usual password-recovery steps. The easiest way is to reset the passwords by pressing the CLEAR button on the front panel for not less than 5 seconds,  but not more than 15 seconds, of course you must have a physical access … Continue reading How to reset password on HP Aruba 2540 / 2500-series switches

HP / Aruba Procurve 2530/2500 Default Management IP, Username/Passwrods and Configurations

Back-up of an existing config If you are performing a backup a config from another switch, two ways of downloading the configuration is through GUI and CLI (via TFTP) via GUI: (System -> Updates/Download -> Configuration File (Highlight config name and click Download) via CLI. (you need to set up a TFTP server on a … Continue reading HP / Aruba Procurve 2530/2500 Default Management IP, Username/Passwrods and Configurations

Cisco: All about errdisable (and how to enable ports disabled by it)

Errdisable is a feature that automatically disables a port on a Cisco Catalyst switch and is supported on most Catalyst switches running the Cisco IOS software. The Errdisable error disable feature was designed to inform the administrator when there is a port problem or error.  The reasons a catalyst switch can go into Errdisable mode and shutdown … Continue reading Cisco: All about errdisable (and how to enable ports disabled by it)

Understanding SPAN,RSPAN,and ERSPAN

Introduction: Switch port Analyzer (SPAN) is an efficient, high performance traffic monitoring system. It duplicated network traffic to one or more monitor interfaces as it transverse the switch. SPAN is used for troubleshooting connectivity issues and calculating network utilization and performance, among many others. There are three types of SPANs supported on Cisco products, which … Continue reading Understanding SPAN,RSPAN,and ERSPAN

Cisco Switch Selector / Model Finder Tool

Few days ago, I shared a link for HPE Switch Selector / Model Finder tool, to help finding an appropriate HPE switch model based on your requirement. My client preferred a Cisco, so I have to find an appropriate Cisco model for them and found a similar tool to that of HPE. https://www.cisco.com/c/dam/assets/prod/switches/cisco-switch-selector-how-to/index.html#/ Check it … Continue reading Cisco Switch Selector / Model Finder Tool

HPE Switch Selector / Model Finder Tool

While looking around for a switch model for one of my clients, I found an interesting page to find an appropriate HPE switch model based on your requirement of Routing/Switching, Port Type, Uplink SPeed, Features (POE, etc) http://h17007.www1.hpe.com/us/en/networking/products/switches/switch-selector.aspx#.WWNRFOn-uM8 Check it out! There is a similar tool too available for Cisco.