Last Modified: Feb 13, 2019
Opened: Oct 23, 2013
Related AskF5 Article: K15826
TMM might crash if an ICMP packet refers to a closed UDP connection.
Traffic disrupted while tmm restarts.
- A virtual server with UDP profile. This is more likely to occur if the UDP profile 'Datagram LB' option is enabled and/or if the UDP profile timeout is 0 or 'immediate'. - An ICMP packet (such as destination-unreachable) arrives matching the IP and port tuple of an old UDP connection just after a new UDP packet arrives from a client with the same tuple for a new connection.
If the UDP profile timeout is set to 0 or 'immediate', consider increasing this value.