Cisco Support Community
Showing results for 
Search instead for 
Did you mean: 
Step-by-Step Configuration and Troubleshooting Best Practices for the NGFW, NGIPS and AMP Technologies A Visual Guide to the Cisco Firepower Threat Defense (FTD)
Community Member

IDS 4240 Configuration

Dear All,

I installed the cisco ids 4240 ver 4.1.4 s91 in the datacenter. It has 4 giga sniffing ports. After I connected it to the network in IEV i am getting sigid 993 alarm.

What does this error mean?


Cisco Employee

Re: IDS 4240 Configuration

993 is a "missed packet" alarm. Containined in the alarm details you'll see a details of missed packets. This alarm will typically fire on an over-subscribed sensor ... too much traffic at times to inspect, thus some packets are dropped. It's very possible that you are exceeding the rated capabilities of the device.

One thing you should definately do is upgrade to the recent service pack 4.1(5)S189 and then apply the S190 signature update. The service pack provides some bug fixes as well as performance enhancements. The current signature package available is S190, you're running S91 - you're almost 100 signature update packages out of date.

You can get the needed files from the following link provided you have a valid service contract, and a valid CCO login ID:

CreatePlease to create content