Cisco NX-OS Malformed IP Packet Denial of Service Vulnerability
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cis
A malformed, transit IP packet that would normally be forwarded
by the switch is received and the Time-to-live (TTL) is 1. In
this case, an ICMP error message (time exceeded) needs to be
generated. During generation of this ICMP message, the bug could
be triggered.
Nice behavior.