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SCTP
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... Stream - A stream refers to an SCTP stream: a uni-directional logical
channel established from one SCTP endpoint to another associated SCTP
endpoint ...
... stream refers to an SCTP stream: a uni-directional logical
channel established from one SCTP endpoint to another associated SCTP
endpoint, within which all user messages are delivered in sequence
except for those submitted to the un-ordered delivery ...
... SCTP stream: a uni-directional logical
channel established from one SCTP endpoint to another associated SCTP
endpoint, within which all user messages are delivered in sequence
except for those submitted to the un-ordered delivery service ...
... IUA use the services of the Stream Control
Transmission Protocol (SCTP) as the underlying reliable common
signaling transport protocol ...
... redundancy is supported below the transport layer. In these
cases, the SCTP functions above MAY be determined to not be required
and TCP MAY be used as the underlying common transport ...
... state of all
dynamically registered remote ASPs, in order to manage the SCTP
associations and the traffic between the SG and ASPs ...
... IUA layer MAY be instructed by local management to establish an
SCTP association to a peer IUA node ...
... peer IUA node. This can be achieved using the
M-SCTP ESTABLISH primitive to request, indicate, and confirm the
establishment of an SCTP association ...
... M-SCTP ESTABLISH primitive to request, indicate, and confirm the
establishment of an SCTP association with a peer IUA node ...
... IUA layer MAY also need to inform local management of the status
of the underlying SCTP associations using the M-SCTP STATUS request
and indication primitive. For example, the IUA ...
... management of the status
of the underlying SCTP associations using the M-SCTP STATUS request
and indication primitive. For example, the IUA MAY inform local
...
... IUA MAY inform local
management of the reason for the release of an SCTP association,
determined either locally within the IUA layer ...
... client and the
other the role of server for initiating SCTP associations. The
default orientation would be for the SG to take on the role ...
... Layer Management is
defined below to help the Layer Management manage the SCTP
association(s) between the SG and MGC ...
... IUA layer can be
instructed by the Layer Management to establish an SCTP association
to a peer IUA ...
... to a peer IUA node. This procedure can be achieved using the M-SCTP
ESTABLISH primitive.
M-SCTP ESTABLISH ...
... M-SCTP ESTABLISH
The M-SCTP ESTABLISH primitives are used to request, indicate, and
confirm the establishment of an SCTP association ...
... The M-SCTP ESTABLISH primitives are used to request, indicate, and
confirm the establishment of an SCTP association to a peer IUA node ...
... M-SCTP RELEASE
The M-SCTP RELEASE primitives are used to request, indicate, and
confirm the release of an SCTP association ...
... The M-SCTP RELEASE primitives are used to request, indicate, and
confirm the release of an SCTP association to a peer IUA node ...
...
The IUA layer MAY also need to inform the status of the SCTP
associations to the Layer Management. This can be achieved using the
M-SCTP STATUS ...
... SCTP
associations to the Layer Management. This can be achieved using the
M-SCTP STATUS primitive.
M-SCTP STATUS ...
... M-SCTP STATUS
The M-SCTP STATUS primitives are used to request and indicate the
status of the underlying SCTP association ...
... The M-SCTP STATUS primitives are used to request and indicate the
status of the underlying SCTP association(s).
...
... peer-to-peer messages (ASPM messages as described in Section 3.3.2)
or reception of indications from the local SCTP association. ASP
...
... SCTP Stream Management ...
...
SCTP allows a user-specified number of streams to be opened during
the initialization. It is the responsibility of the IUA layer ...
... message header.
The use of SCTP streams within IUA is recommended in order to
minimize transmission and buffering ...
... reliability of the signaling elements. It is
recommended that a separate SCTP stream is used for each D channel.
...
... If the IUA layer becomes congested (implementation dependent), it MAY
stop reading from the SCTP association to flow control from the peer
IUA ...
...
An example of the upper layer primitives provided by SCTP are
available in Section 10 of RFC 2960prop [4 ...
...
M-SCTP ESTABLISH request
Direction: LM -> IUA
...
... IUA -> LM
Purpose: ASP confirms to LM that it has established an SCTP
association with an SG ...
... Stream Identifier" error would be sent if a message was
received on an unexpected SCTP stream (e.g., a MGMT message was
received on a stream ...
... various fields of the common and specific headers correctly. In
addition, the message needs to be sent on the SCTP stream that
corresponds to the D channel (Interface Identifier ...
... interface.
An M-SCTP ESTABLISH request from Layer Management will initiate the
establishment of an SCTP ...
... M-SCTP ESTABLISH request from Layer Management will initiate the
establishment of an SCTP association. An M-SCTP ESTABLISH confirm
...
... establishment of an SCTP association. An M-SCTP ESTABLISH confirm
will be sent to Layer Management when the initiated association ...
... Layer Management when the initiated association setup
is complete. An M-SCTP ESTABLISH indication is sent to Layer
Management upon successful completion of an incoming SCTP association ...
... is complete. An M-SCTP ESTABLISH indication is sent to Layer
Management upon successful completion of an incoming SCTP association
setup from a peer IUA ...
... M-SCTP RELEASE request from Layer Management will initiate the
teardown of an SCTP association. An M-SCTP RELEASE confirm will be
...
... teardown of an SCTP association. An M-SCTP RELEASE confirm will be
sent by Layer Management when the association ...
... Layer Management when the association teardown is complete.
An M-SCTP RELEASE indication is sent to Layer Management upon
successful teardown of an SCTP ...
... M-SCTP RELEASE indication is sent to Layer Management upon
successful teardown of an SCTP association initiated by a peer IUA.
...
... MGMT messages are sent on a sequenced stream to ensure ordering.
SCTP stream '0' SHOULD be used.
...
... MGMT messages are sent on a sequenced stream to ensure ordering.
SCTP stream '0' SHOULD be used.
...
... Application Server Process is unavailable and/or the
related SCTP association is down. Initially, all ASPs will be in
...
... IUA peer at the ASP is available (and the
related SCTP association is up) but application traffic is stopped.
...
... Upper Layer Protocol (IUA) on an SG. The local SCTP will send
this indication when it detects the loss of connectivity to the ASP's
...
... this indication when it detects the loss of connectivity to the ASP's
peer SCTP layer. SCTP CDI is understood as either a SHUTDOWN
...
... peer SCTP layer. SCTP CDI is understood as either a SHUTDOWN
COMPLETE notification and COMMUNICATION LOST notification ...
... upper layer
protocol (IUA) on an SG. The local SCTP will send this indication
when it detects a restart from the ASP ...
... SG, the IUA layer at an ASP receives an M-SCTP
ESTABLISH request primitive from the Layer Management, the IUA layer
...
... Layer Management, the IUA layer
will try to establish an SCTP association with the remote IUA peer at
...
... IUA peer at
an SG. Upon reception of an eventual SCTP-Communication Up confirm
primitive from the SCTP, the IUA layer ...
... SG. Upon reception of an eventual SCTP-Communication Up confirm
primitive from the SCTP, the IUA layer will invoke the primitive
M-SCTP ESTABLISH ...
... SCTP, the IUA layer will invoke the primitive
M-SCTP ESTABLISH confirm to the Layer Management.
...
... At the SG, the IUA layer will receive an SCTP Communication Up
indication primitive from the SCTP. The IUA layer ...
... IUA layer will receive an SCTP Communication Up
indication primitive from the SCTP. The IUA layer will then invoke
the primitive M-SCTP ESTABLISH ...
... SCTP. The IUA layer will then invoke
the primitive M-SCTP ESTABLISH indication to the Layer Management.
...
... Layer Management.
Once the SCTP association is established and assuming that the local
IUA-User ...
... association for management reasons, it would send M-SCTP RELEASE
request primitive to the local IUA layer. The IUA layer ...
... SCTP association and upon receiving the SCTP-
COMMUNICATION_DOWN indication from the underlying SCTP layer ...
... receiving the SCTP-
COMMUNICATION_DOWN indication from the underlying SCTP layer, it
would inform the local Layer Management ...
...
If the IUA layer receives an SCTP-COMMUNICATION_DOWN indication from
the underlying SCTP layer ...
... IUA layer receives an SCTP-COMMUNICATION_DOWN indication from
the underlying SCTP layer, it will inform the Layer Management by
...
... layer, it will inform the Layer Management by
invoking the M-SCTP RELEASE indication primitive. The state of the
ASP ...
... At an ASP, the Layer Management MAY try to reestablish the SCTP
association using M-SCTP_ESTABLISH ...
... M-SCTP_ESTABLISH request primitive.
In the case of an SCTP-RESTART indication at an ASP, the ASP ...
... All ASPM messages are sent on a sequenced stream to ensure ordering.
SCTP stream '0' SHOULD be used.
...
... Data messages from an SG
may be sent on different SCTP streams. Message loss is possible as
the ASP does not consider itself in the ASP ...
... registered to process the traffic for more than one Application
Server across an SCTP association, the ASPIA contains one or more
...
... ASP
is configured within an AS (no backup). It is assumed that the SCTP
association is already setup.
...
... IUA value for the Payload Protocol
Identifier in SCTP Payload Data chunk. The following SCTP Payload ...
... Protocol
Identifier in SCTP Payload Data chunk. The following SCTP Payload
Protocol Identifier ...
... SCTP Payload Protocol Identifier is included in each SCTP Data
chunk, to indicate which protocol the SCTP is carrying. This Payload ...
... Protocol Identifier is included in each SCTP Data
chunk, to indicate which protocol the SCTP is carrying. This Payload
Protocol Identifier ...
... Payload
Protocol Identifier is not directly used by SCTP but MAY be used by
certain network entities to identify the type of information being
...
... Protocol Identifier as a
way of determining additional information about the data being
presented to it by SCTP.
...
... Stone, J., Stewart, R., and D. Otis, "Stream Control Transmission Protocol (SCTP) Checksum Change", RFC 3309prop, September 2002. ...
... Quality of Service (QoS)-bounded IP network paths for SCTP
Associations between SCTP End Points, and redundant Hosts, and
...
... QoS)-bounded IP network paths for SCTP
Associations between SCTP End Points, and redundant Hosts, and
redundant SGs. The distribution of ASPs ...
... ASP1 * *
* SG1 * SCTP Associations | * ******** *
* *_______________________ | * *
******** | | **************
...
... * * |
* SG2 * SCTP Associations |
* *____________ |
* * | | Host2
...
... ASPs be in the list, resident in separate hosts and therefore
available over different SCTP Associations. For example, in the
network shown in Figure 8, all messages from a particular D Channel ...
... ASP1/Host1. In this example, both ASPs are
Up, meaning that the related SCTP association and far-end IUA ...