ltm rule command TCP dsack

iRule(1)		      BIG-IP TMSH Manual		      iRule(1)



TCP::dsack
       Toggles TCP duplicate selective acknowledgments (D-SACK).

SYNOPSIS
       TCP::dsack BOOL_VALUE

DESCRIPTION
       Enables or disables TCP duplicate selective acknowledgements.  When
       enabled, accepts D-SACKs from remote hosts, which explicitly
       acknowledge duplicate packets and allow more accurate reaction to out-
       of-order and late packets.  See RFC3708 for details.

       Syntax

       TCP::dsack 

RETURN VALUE
       None.

VALID DURING
       ANY_EVENT

EXAMPLES
	when SERVER_CONNECTED {
	    log local0. "Client: [client_addr]:[client_port] - Server: [server_addr]:[server_port]."
	    # Set client-side D-SACKs to enabled.
	    clientside {
		TCP::dsack enable
	    }
	    # Set server-side D-SACKs to disabled.
	    serverside {
		TCP::dsack disable
	    }
	}

HINTS
SEE ALSO
CHANGE LOG
       @BIGIP-11.6.0 --First introduced the command.



BIG-IP				  2017-01-31			      iRule(1)