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In: Cisco
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STP Portfast is a feature in Cisco IOS which allows a switchport which is participating in STP to directly transition from Blocking mode  to Forwarding mode when a device connects and the link goes up. This can improve the initial connect time and can fix some issues with Windows based devices connecting to the Active Directory domains. STP Portfast is ideal for ports which connects directly attached devices and certainly not for the ports which connects a hub or a switch. Hence, good to set switchports that directly connect end devices on your Access switch.Read More →

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In: Cisco, Sniffing/PacketCapture
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Cisco SPAN port is a SwitchPort ANalyzer on the cisco catalyst that allows to select and span or copy traffic from one or more source switchports or source VLANs onto one or more destination ports. The destination port(s) runs a sniffing or a packet capture program like Ethereal, Wireshark or TCPDump. Cisco IOS support Local SPAN and Remote SPAN (RSPAN).Read More →