RFC 3821 : "Fibre Channel Over TCP/IP (FCIP)"
FCIP_LEP = FCIP Link Endpoint
8.3.2. TCP Window Scale Option
The TCP Window Scale option [8] allows TCP window sizes larger than 16-bit limits to be advertised by the receiver. It is necessary to allow data in long fat networks to fill the available pipe. This also implies buffering on the TCP sender that matches the (bandwidth*delay) product of the TCP Connection. An FCIP_LEP uses locally available mechanisms to set a window size that matches the available local buffer resources and the desired throughput.
Yo diría que lo deja en que cada uno se resuelva el problema. Vamos, que para no haberme mirado la RFC en mucho tiempo no he errado mucho el tiro ;-)