SCTP Administrator's Guide

Table 1-1 SCTP Parameters Supported by the ndd Command (continued)
DescriptionParameter
Specifies the value of 'alpha', which is used to
calculate the retransmission timeout. The higher
the value of 'alpha', the more influence the latest
round-trip time has on the current smoothed
round-trip time value. The value of 'alpha' is a
decimal specified in the range 0 to 1000.
sctp_rto_alpha
Specifies the value for 'beta', which is used to
calculate the retransmission timeout. The higher
the value of 'beta', the more influence the latest
round-trip variance has on the current smoothed
round-trip variance value. The value of ‘beta’ is a
decimal specified in the range 0 to 1000.
sctp_rto_beta
Provides an option to support the ‘hostname’
address in the incoming INIT or INIT ACK chunks.
If this option is set to YES, then INIT or INIT ACKs
received contains the 'hostname' address, and the
'hostname' is resolved to the address. The ‘supported
address types’ option indicates that the ‘hostname’
address format is supported.
If this is set to NO, then SCTP will not support a
'hostname' address in an incoming INIT or INIT
ACK. The ‘supported address types’ option indicates
that the 'hostname' address format is not supported.
sctp_in_host_supported
Enables you to append a 'hostname' address to the
outgoing INIT or INIT ACK chunks and to specify
the name to be appended in the INIT or INIT ACK
chunk. To specify that a 'hostname' address
parameter must not be appended to the outgoing
packets, the name field must be left blank
sctp_hostname
Specifies the checksum type to be used for the
messages. This option is not available if SCTP
supports either CRC-32c or Adler32 checksum
algorithms. Hence, if this option is used, it results
in a warning.
sctp_checksum
Specifies the Silly Window Syndrome threshold. It is
a percentage and it must be in the range 0 to 100. If
the value of sctp_sws_threshold is less than the
existing percentage, then the receive window is set
to 1. As a result, it stops the peer from using very
small windows to send data.
sctp_sws_threshold
The ndd Command 21