Transport Manager Configuration Set elements

Table 4-2 describes the fields on the Transport Manager > Configuration > Configuration Set pages.

Many of the fields in the table use the value configured in the Default Configuration Set as their default. If the defaults have been modified, the new values are shown on the Transport Manager > Configuration > Configuration Set pages. The original default values are shown in Table 4-2.

Table 4-2 Transport Manager Configuration Set Elements

Element (* indicates required field)	Description	Data Input Notes
* Configuration Set Name	A name that uniquely identifies the SCTP Transport Manager Configuration Set. The Configuration Set Name field is required, must be unique, and cannot be edited after it is created.	Format: A case-sensitive string. Valid characters are alphanumeric and underscore. Must contain at least one alpha and must not start with a digit. Range: Up to 32 characters.
* Retransmit Initial Timeout	The expected average network round-trip time in milliseconds. This value is used to initialize the round-trip time value when an association is first started and the round-trip time has not yet been measured. The round-trip time is used by SCTP in calculating when to retransmit chunks.	Format: Numeric Range: 10 - 5000 msec Default: 120
* Retransmit Minimum Timeout	The minimum amount of time to wait for an acknowledgment for a message sent. This value prevents the retransmit timeout from becoming too small in networks with a very short round-trip time.	Format: Numeric Range: 10 - 1000 msec This minimum value cannot be greater than the maximum value. Default: 120
* Retransmit Maximum Timeout	The maximum amount of time to wait for an acknowledgment for a message sent. This value places an upper bound on the exponential back-off algorithm used by SCTP for retransmission timing. After this retransmit interval is reached, retransmits are sent at a constant rate until an ACK is received or the maximum attempt is reached.	Format: Numeric Range: 10 - 10000 msec This maximum value cannot be less than the minimum value. Default: 120
* Number of Retransmits Triggering Association Failure	Number of consecutive retransmits that cause an SCTP Association to be marked as failed. This value indicates how many SCTP retransmission attempts should be made to all destinations for an SCTP association before marking the association as failed. This value should not be greater than the sum of the retransmit attempts for all destinations within the association.	Format: Numeric Range: 1 - 12 Default: 5
* Number of Retransmits Triggering Init Failure	Number of consecutive retransmits for INIT and COOKIE-ECHO chunks that cause an SCTP Association to be marked as failed. This value indicates how many retransmission attempts should be made to the primary SCTP address for INIT and COOKIE-ECHO chunks before marking the association as failed.	Format: Numeric Range: 1 - 12 Default: 8
* SACK Delay	The number of milliseconds to delay after receiving a DATA chunk and prior to sending a SACK. A non-zero value for SACK Delay gives the application time to bundle DATA chunks in the same SCTP datagram with the SACK, thereby reducing the number of packets in the network. Setting SACK Delay to zero disables this delay so that SACKs are sent as quickly as possible.	Format: Numeric Range: 0 - 200 msec Default: 10
* SCTP Heartbeat Interval	The interval in milliseconds between sending SCTP HEARTBEAT messages to a peer. HEARTBEAT messages are only sent when no user data has been sent for the duration of the heartbeat interval. Setting the heartbeat interval to zero disables heartbeating (not recommended).	Format: Numeric Range: 0, 100 - 300000 msec Default: 1000
* Connection Retry Interval	The interval in seconds between connection attempts when the connection is unsuccessful.	Format: Numeric Range: 5 - 60 sec Default: 10
* Socket Send Buffer Size	The socket send buffer size (in bytes) for outgoing SCTP messages. The send buffer size should be greater than or equal to the product of the bandwidth and the round trip delay for the Association.	Format: Numeric Range: 65535 - 5000000 bytes Default: 2000000
* Socket Receive Buffer Size	The socket receive buffer size (in bytes) for incoming SCTP messages. The receive buffer size should be greater than or equal to the product of the bandwidth and the round trip delay for the Association.	Format: Numeric Range: 65535 - 5000000 bytes Default: 2000000
* SCTP Multihoming Mode	The SCTP Multihoming mode allows the user to configure remote host validation mode setting for SCTP. If the Adjacent Node is Multihomed for a specified Transport, Adjacent Node IP Addresses received in INIT/INIT-ACK chunk are validated based on this parameter. SCTP Multihoming Mode = Relax: One of the IP Address received from Adjacent Node in an INIT/INIT-ACK chunk must match any of the configured Adjacent Node IP Address associated with that Transport. SCTP Multihoming Mode = Match: All of the IP Address received from Adjacent Node in an INIT/INIT-ACK chunk must match all of the configured Adjacent Node IP Address associated with that Transport.	format: Pulldown list Range: Relax, Match Default: Relax