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When there is a SCTP connection established, the router will request the ARP for the client-side multi-homing alternate address, but the standby device will reply to the ARP request as well.
Traffic for the alternate-addresses may be directed to the wrong device in an HA group. The multi-homing function will fail as the alternate connection cannot established on the standby device.
When an SCTP profile has at least one alternate-address configured, and is used in an high availability (HA) scenario, this issue will manifest.
Do not use a VLAN address as an alternate address. Use only routed addresses, and route those addresses to the floating Self-IP address of the BIG-IP system.
SCTP multihoming has been fixed to work correctly when used in a high availability setup with VLAN addresses
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