SCTP Release Notes HP-UX 11i v2, HP-UX 11i v3 (5900-1238, October 2010)

• draft-stewart-sctp-pktdrprep-02.txt (Stream Control Transmission Protocol (SCTP)
Packet Drop Reporting)
• draft-ietf-tsvwg-sctpsocket-10.txtSockets API Extensions for Stream Control
Transmission Protocol
What Is In This Version
This version of SCTP for the HP-UX 11i v3 operating system does not include any new
feature and contains only defect fixes. For information on the defect fixes, see “Defects
Fixed in This Release” (page 14).
SCTP Features
SCTP supports the following features:
• “Multihoming” (page 6)
• “Mulstreaming” (page 6)
• “Conservation of Data Boundaries” (page 7)
• “SCTP Graceful Shutdown Feature” (page 7)
• “SCTP Support for IPv4 and IPv6 Addresses” (page 7)
• “SCTP Data Exchange Features” (page 7)
• “Support for Dynamic Address Reconfiguration” (page 8)
• “Reporting Packet Drops to an Endpoint” (page 8)
• “SCTP Support for Partially Reliable Data Transmission” (page 9)
• “Support for ECN-Nonces in SCTP” (page 10)
Multihoming
Multihoming is the ability of a single SCTP endpoint to contain multiple interfaces
with different IP addresses. In a single-homed connection, an endpoint contains only
one network interface and one IP address. When a network or path failure occurs, the
endpoint is completely isolated from the network. Multihoming in SCTP ensures better
chances of survival if a network failure occurs, when compared to TCP. The built-in
support for multi-homed hosts in SCTP enables a single SCTP association to run across
multiple links or paths, to achieve link or path redundancy. This enables an SCTP
association to achieve faster failover from one link or path to another, with minimum
interruption in the data transfer service.
Mulstreaming
Multistreaming in SCTP enables data to be sent in multiple, independent streams in
parallel, so that data loss in one stream does not affect or stop the delivery of data in
other streams. Each stream in an SCTP association uses two sets of sequence numbers,
namely a Transmission Sequence Number (TSN) that governs the transmission of
6 SCTP Release Notes