TYPE 11 is Time Exceeded and CODE 1 for TYPE 11 is Fragment Reassembly Time Exceeded.
From: The TCP/IP Guide
There is another “time expiration” situation where ICMP Time Exceeded messages are used. When an IP message is broken into fragments, the destination device is charged with reassembling them into the original message. One or more fragments may not make it to the destination, so to prevent the device from waiting forever, it sets a timer when the first fragment arrives. If this timer expires before the others are received, the device gives up on this message. The fragments are discarded, and a Time Exceeded message generated.