• Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 921
  • Last Modified:

Is there a way to span a port on Catalyst 2950 to multiple ports?

Hello all Experts!
I am trying to span one single port to many ports, that is to say that i would like to have 1 source port and many destination ports. I understand this is only done via a VLAN scenario where you set the source port to feed it to a VLAN.

I think that Catalyst 2950 does not support more than one monitor session.

Please let me know if I am incorrect.

Thank you!
  • 3
  • 3
1 Solution
Actually, I'm pretty sure you can have 2 SPAN sessions on the 2950.  The same source port can be used in both sessions to different destination ports.
maredzkiAuthor Commented:
Here is my dump from the sh run. I am not sure this will work as session 2 does not have a source port. If i put source port on session 2 it tells me that Fa0/15 is already configure as source.

The only thing i can try doing is setting session 2 to have a source port of Fa0/14 and destination of Fa0/12.

monitor session 1 source interface Fa0/15
monitor session 1 destination interface Fa0/14
monitor session 2 destination interface Fa0/12
maredzkiAuthor Commented:
Sorry missed a comment...

Here is the error i get when i try to add another destination port in session 1

ADMSW03(config)#monitor session 1 destination interface Fa0/12
Platform only supports a maximum of 1 destination/reflector port(s) in a source

Thank you,
We Need Your Input!

WatchGuard is currently running a beta program for our new macOS Host Sensor for our Threat Detection and Response service. We're looking for more macOS users to help provide insight and feedback to help us make the product even better. Please sign up for our beta program today!

That's strange.  I could have sworn you could have two sessions with the same source as long as the destination was different.

I guess I was wrong, according to this Cisco doc, you can only have one active SPAN session at a time on the 2950.

SPAN on the Catalyst 2940, 2950, 2955, 2970, 3550, 3560, and 3750 Series Switches
These are guidelines for the configuration of the SPAN feature on the Catalyst 2940, 2950, 2955, 2970, 3550, 3560, and 3750 Series Switches:

The Catalyst 2950 Switches can have only one SPAN session active at a time and can monitor only source ports. These switches cannot monitor VLANs.

maredzkiAuthor Commented:
So what are my options at this point?
Unfortunately, it sounds like not to many unless you have a 4500 or 6500 that you could do the SPAN on.  It appears only one SPAN session is allowed on the 2950 and you can only have one destination port in a SPAN session.
Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

Join & Write a Comment

Featured Post

Identify and Prevent Potential Cyber-threats

Become the white hat who helps safeguard our interconnected world. Transform your career future by earning your MS in Cybersecurity. WGU’s MSCSIA degree program was designed in collaboration with national intelligence organizations and IT industry leaders.

  • 3
  • 3
Tackle projects and never again get stuck behind a technical roadblock.
Join Now