MicroNugget: How to Configure SPAN and RSPAN on a Cisco Switch

In this video, Jeremy Cioara covers how to configure SPAN and RSPAN on a Cisco switch. He begins with a brief overview of how switches are designed to work, then gives examples of why a network administrator might want to step outside of that construct and how to do so.

Jeremy starts the video with an outline of how switches work and why exceptions sometimes need to be made. Switch port analyzer sessions and remote sessions are key resources for network administrators to be able to see inside of a switch and analyze what’s actually happening. You can do this regardless of whether data is being sent, received, or both simultaneously. This video will walk you through the basic theory behind why monitoring sessions are necessary. Jeremy will also demonstrate a step-by-step example of how to configure a Cisco switch for both SPAN and RSPAN, as well as examples for when each approach is appropriate.

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[alexandermarcus]

I absolutely love this Jeremy, he made my Cisco career fun.

[bosomfiea]

learning cisco was initially very difficult until I came across this guy call Jeremy. Thank you Jeremy for the tutorials. It wsa boring watching you. Stay bless for ever.

[valterpereiracjr]

Jeremy, you are truly a one man show. It is inspiring to watch you doing what seems to be "magic". You have a gift. Thank you for hours of knowledge and fun!

[dopiaza]

This was informative for me, and I'd like to thank you for presenting :)

[fadzaik]

I've never laughed so good at the end there... wow the dynamic of your personality is AMAZING !!!

[cbtnuggets]

Dust off the cobwebs from the weekend with Jeremy Cioara's newest MicroNugget! Jeremy explains how to configure SPAN and RSPAN on a Cisco switch here:

[snickered]

My first post ever... You are the ultimate nerd!

Thanks for the video, I've never done RSPAN. Things are so much easier when you get a crash-course! Much appreciated, sir.

[moxy]

I wrote Jeremy an email about this subject quite a long time ago and am happy to see an answer! TYVM, sir!

[samuelkimani]

The ending...Hahaha. Really Jeremy??? Thanks for the video.

[Eewokney]

Thank you Jeremy, needed to do this half a year ago, figured it out through the internet but its a nice refresher.

[MaheshM-zzki]

This Was one best micro-nugget, And You know Jeremy, the best information we got not only SPAN and RSPAN but also about Twinkies ..   but Twinkies are not good for health  of  Networkers 

[dihaji]

Great video!! I needed a quick refresh and this was the perfect video. I need to run off and span some ports and couldn't remember if the RSPAN would knock off some ports, thank you!! I will stick to spanning the ports, only 7 switches. =)

[itsshowtime]

super easy, ot the point without missing any important information (uncluding reflector port) and funny :) got my like

[ES-fgsm]

Thank you so much for this video!!! 🙏🏽🙏🏽🙏🏽

[leochong]

great video. cbt nuggets are the best.

[kofibonsu]

Hi- I have 66 SPAN sessions, I have a monitor running on one of my switch interfaces. I want to monitor all traffic that comes in and out the switch( even to all vlans). is there a command to have all ports as the source of monitor or do I have to use each SPAN session per vlan?

[yanivsudai]

i don't know if you answer my question
sense this movie is old or maybe somebody else see this comments can answer me
one thing i don't get it: if there are no VLAN it all in the switch like new switch
why i can't listening to all other traffic in the the network/ports
this video explain how to listening to traffic assuming that all other port that i want to listening are attech to VLAN?

[Santucci]

I'd love to see a MicroNugget on configuring ERSPAN, where to use it and where not to use it. Thanks

[mikeyspice]

I live in the UK. Just whatched the video. way way way fast but i whatched it multiple

ive setup local SPAN on a 2950 switch - Successfully

I added another switch 2950 & TRUNKED it to the other switch adding vlan 999 as per video in trunk mode on both ends

i also added vlan 999 on both host pc ports

THE VIDEO STATES that there maybe a specific port used for RSPAN - can anyone tell me which port as I assume i CANNOT use any port for RSPAN according the the video ????

[xieluosi]

Thanks very much for your sharing Jeremy, does RSPAN works if traffic passing through the router?