SCTP multi-homing failover delays

Solution Verified - Updated -

Issue

  • When using multi-homing in SCTP there is a fairly high failover delay when a link goes down. Steps to reproduce this behaviour are detailed as follows:
  1. On the server : ./iperf -s -l 1000 -p 3333 -z
  2. On the client : ./iperf -c 172.16.0.1 -l 1000 -p 3333 -z -t 300
  3. Do an ifconfig down on server

The test is blocking for about 1 min before resuming.

Environment

  • Red Hat Enterprise Linux (All versions)
  • Stream Control Transmission Protocol (SCTP)

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