Possible Future Requirements for TCP Chimney-Capable NICs
[The TCP chimney offload feature is deprecated and should not be used.]
We strongly recommend, although it is not yet required, that vendors implement the following in TCP/IP stack of a TOE NIC:
IP explicit congestion notification (ECN), as specified in RFC 3168
Support for the NewReno modification to TCP's fast recovery algorithm, as specified in RFC 2582
Enhancements to TCP's loss recovery, by using limited transmit, as specified in RFC 3042
Selective acknowledgement (SACK) handling, as specified in RFCs 2018, 2883, and 3517