Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Announcements

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. If you'd prefer to explore, try our test area to get started. And see here for current known issues.

New Member

Does Cisco IPS acts like a switch?

I have not used Cisco IPS before, and originally there are only two unmanaged switches, I would like to add IPS to the layer2 architecture..

I add a Cisco IPS and two more unmanaged switch...I was wondering will this cause a bridging loop?

Everyone's tags (4)
2 REPLIES
VIP Purple

Does Cisco IPS acts like a switch?

Yes, that will cause a loop. These inline IPS are also named "bump in the wire". Or look at it if it would be an intelligent Ethernet-cable.

Perhaps it's best to describe your topology and then it's possible to give you an advice how to place your IPS.


--
Don't stop after you've improved your network! Improve the world by lending money to the working poor: http://www.kiva.org/invitedby/karsteni
Gold

Does Cisco IPS acts like a switch?

The Cisco IPS sensors will pass Spanning Tree Protocol BPDUs. So, if you have STP enabled on yoru switch(s) you shouldn;t be creating any loops. You should be careful however that you don;t let STP block the port feeding traffic to your IPS sensor. You can see this if you start seeing traffic only in one direction on your sensor. (then check your switch with a "show spanning-tree vlan X" to see what paths you have to the root switch and which paths are blocked (BLK).

- Bob

724
Views
0
Helpful
2
Replies