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Why does so many companies use their own SCTP implementation despite of having support of lksctp in a linux system ?

+2 votes
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Why does so many companies use their own SCTP implementation despite of having support of lksctp in a linux system ?
posted Jan 11, 2015 by Harshita

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+4 votes

Are the values in /proc/sys/net/sctp/sctp_[rw]mem honored? Or are they overridden by those in /proc/sys/net/core/[rw]mem_*

Furthermore, the kernel documentation states that sctp_wmem has no effect, but makes no such mention for sctp_mem and sctp_rmem.

+2 votes

Is LKSCTP 100% compliant with the following?

RFC 2960 - SCTP (obsoleted by RFC 4960)
RFC 3309 - SCTP Checksum Change (obsoleted by RFC 4960)
RFC 3758 - SCTP Partial Reliability Extension
RFC 3873 - SCTP MIB
RFC 4460 - SCTP Errata and Issues
RFC 4895 - Authenticated Chunks for SCTP
RFC 4960 - SCTP
RFC 5061 - SCTP Dynamic Address Reconfiguration
RFC 5062 - Security Attacks Against SCTP

Any pointers are welcome?

0 votes

We are using LKSCTP version 1.0.16 and have configured the SCTP configuration parameters as follows:

SctpInitMaxAttempts : 10
SctpInitRTO : 3000
SctpMinRTO : 1000
SctpMaxRTO : 60000

We observed that SCTP:INIT re-transmission is occurring at interval 6,12,24.., 6,12,24.., 6,12,24....... As per our understanding re-transmission should occur at interval 3,6,12,24..., 3,6,12,24...3,6,12,24... since SctpInitRTO=3000.

Could you please let us know if it is an expected behavior or not. Also why re-transmission interval is not started with 3,6,12,24...

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