Administrator Guide

ip tcp initial-time
Define the wait duration in seconds for the TCP connection to be established. This command is supported on the , , , and Z9000
platforms.
Syntax
ip tcp initial-time <8-75>
To restore the default behavior, which causes the wait period to be set as 8 seconds, use the no ip
tcp initial-time command.
Parameters
<8-75> Wait duration in seconds for the TCP connection to be established.
Command Modes
CONFIGURATION
Command
History
Version Description
9.7(0.0) Introduced on the S6000-ON.
9.3(0.0) Introduced on the S4810, S4820T, S6000, and Z9000 platforms.
Usage
Information
You can configure the amount of time for which the device must wait before it attempts to establish a
TCP connection. Using this capability, you can limit the wait times for TCP connection requests. Upon
responding to the initial SYN packet that requests a connection to the router for a specific service (such
as SSH or BGP) with a SYN ACK, the router waits for a period of time for the ACK packet to be sent
from the requesting host that will establish the TCP connection.
show ip tcp initial-time
Displays the interval that you configured for the device to wait before the TCP connection is attempted to be established.
Syntax
show ip tcp initial-time
Command Modes
EXEC
EXEC Privilege
Command
History
Version Description
9.7(0.0) Introduced on the S6000-ON.
9.3(0.0) Introduced on the S4810, S4820T, S6000, Z9000, and MXL platforms.
ip unreachables
Enable the generation of internet control message protocol (ICMP) unreachable messages.
Z9000
Syntax
ip unreachables
To disable the generation of ICMP messages, use the no ip unreachables command.
Defaults Disabled.
Command Modes INTERFACE
Command
History
This guide is platform-specific. For command information about other platforms, refer to the relevant Dell
Networking OS Command Line Reference Guide.
The following is a list of the Dell Networking OS version history for this command.
604 IPv4 Routing