EcnCodePoint# Added in version 2.88. class EcnCodePoint# Possible values of Explicit Congestion Notification code points. These appear in TOS (IPv4) or TCLASS (IPv6) packet headers and are described in RFC 3168. Fields# class EcnCodePoint ECT_0# ECN Capable Transport(0) ECT_1# ECN Capable Transport(1) ECT_CE# Congestion Experienced NO_ECN# Not ECN-capable transport