@Vlad - he only has single-homed here per the trace he sent (which the list presumably filtered.) @Ravi - are you inducing impairments in the network? Reason I ask is in the trace, your association comes up and then .82 sends data chunks in frames 5 and 6 - the response from .5 (frame 7) is a GAP-SACK for the TSN in frame 6, indicating the DATA chunk in frame 5 was lost somehow... If you have network impairments (either intentionally, or otherwise) - then our best-case suggestions above will be off as you will likely incur RTO doubling etc. For the random sampling of idle HB intervals I looked at later in the trace (initiated by .82), they all seem to fit the expected range as described above. Cheers, malc. -- To unsubscribe from this list: send the line "unsubscribe linux-sctp" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html