Cisco has released an advisory for IPS platforms, they are susceptible to denial of service attacks. The vulnerability is in the handling of jumbo ethernet frames. A specially crafted packet can cause the device to kernel panic, a power cycle is required to reset the device. However, if the device is deployed in promiscous mode, or does not have a gigabit interface, it is not vulnerable. For vulnerable devices, Cisco has released updates and a workaround. Install the updates, or disable support for jumbo Ethernet to mitigate this issue.