SPAN (Switched Port Analyzer) is a Cisco Proprietary feature which allows to send a copy of traffic passing through ports to another port on the switch.As demand on deep packet inspection and analysis grew , so did the development on SPAN and Cisco cam up with RSPAN and ERSPAN. While SPAN is limited to local switch , RSPAN (Remote SPAN) and ERSPAN (Encapsulated RSPAN) mirroring ports in one switch to a port in different switch.
Both RSPAN and ERSPAN support source ports, source VLANs, and destinations on different switches, which provides remote monitoring of multiple switches across network.Both belong to the SPAN family and are Cisco proprietary.However , being extensions of SPAN technology , RSPAN and ERSPAN tend to differ. Below table enlists some of their distinctions –
Related- Introduction to RSPAN, SPAN and ERSPAN
ABOUT THE AUTHOR
I am here to share my knowledge and experience in the field of networking with the goal being – “The more you share, the more you learn.”
I am a biotechnologist by qualification and a Network Enthusiast by interest. I developed interest in networking being in the company of a passionate Network Professional, my husband.
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