Chapter 6 Installing The Ips-4240 And Ips-4255 - Cisco IDS-4230-FE - Intrusion Detection Sys Fast Ethernet Sensor Installation And Configuration Manual

Installing the IPS-4240 and IPS-4255
The Cisco Intrusion Prevention System (IPS) sensors, the IPS-4240 and the
IPS-4255, deliver high port density in a small form factor. They use a compact
flash device for storage rather than the hard-disk drives used in other sensor
models.
The IPS-4240 monitors up to 250 Mbps of aggregate network traffic on multiple
sniffing interfaces and is inline ready. It replaces the IDS-4235. There are four
10/100/1000 copper sniffing interfaces.
Note The 250-Mbps performance for the IPS-4240 is based on the following
conditions: 2500 new TCP connections per second, 2500 HTTP transactions per
second, average packet size of 445 bytes, system running Cisco IDS 4.1 sensor
software. The 250-Mbps performance is traffic combined from all four sniffing
interfaces.
The IPS-4255 monitors up to 600 Mbps of aggregate network traffic on multiple
sniffing interfaces and is also inline ready. It replaces the IDS-4250-TX. There are
four 10/100/1000 copper sniffing interfaces.
The IDS-4250-SX and the IDS-4250-XL are not being replaced by the IPS-4255
Note
at this time.
Cisco Intrusion Detection System Appliance and Module Installation and Configuration Guide Version 4.1
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