?
Solved

port mirroring and performance

Posted on 2009-05-06
2
Medium Priority
?
961 Views
Last Modified: 2012-05-06
we're installing an IDS here and need to do port mirroring on two modules on our core switch. How much impact am I looking at? is there an easier/better way to do this?


thanks
0
Comment
Question by:dissolved
  • 2
2 Comments
 
LVL 10

Accepted Solution

by:
ngravatt earned 2000 total points
ID: 24316108
there is not significant performance impact.  I use the port mirroring on my core switches, which or Cisco 6509s.  I almost always have two mirroring sessions running.  One is used for IDS and one is used to span all traffic over to another monitoring device.  Cisco limits the number of span sessions to two.

Looking at my 6509 right now, the CPU is less than 10% and the memory usage is about 110 megs.

The only other way to do this is to put your IDS inline or use a hub.  A hub will send all traffic received to all ports.  If you have a connection to your ISP router, then you can take that cable out of you ISP router and plug it into a 4 port hub.  Use one of the ports to complete the connection to your ISP router, then you can take another port and connect it to your IDS device.

There are also some other 3rd party devices that do the same exact thing.  I look into these in the past though, and they were not cheap.
0
 
LVL 10

Expert Comment

by:ngravatt
ID: 24316116
0

Featured Post

What does it mean to be "Always On"?

Is your cloud always on? With an Always On cloud you won't have to worry about downtime for maintenance or software application code updates, ensuring that your bottom line isn't affected.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

This article is a how to to configure a UCS Ethernet-uplink portchannel via the console. It is easy to do and can be done quite quickly. In certain versions of the UCS manager the portchannel has issues coming up and this is a workaround. I am…
#Citrix #Netscaler #MSSQL #Load Balance
In a question here at Experts Exchange (https://www.experts-exchange.com/questions/29062564/Adobe-acrobat-reader-DC.html), a member asked how to create a signature in Adobe Acrobat Reader DC (the free Reader product, not the paid, full Acrobat produ…
Whether it be Exchange Server Crash Issues, Dirty Shutdown Errors or Failed to mount error, Stellar Phoenix Mailbox Exchange Recovery has always got your back. With the help of its easy to understand user interface and 3 simple steps recovery proced…
Suggested Courses
Course of the Month14 days, 2 hours left to enroll

809 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question