4 the policy of unreached messages, 15 ip tcp flag control, 1 rst configuration – Siemens S223 User Manual

Page 173: The policy of unreached messages, Ip tcp flag control, Rst configuration

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User Manual UMN:CLI
SURPASS hiD 6615 S223/S323 R1.5

A50010-Y3-C150-2-7619 173

The following is an example for configuring ICMP Redirect Message and checking the
configuration.

SWITCH(config)# show running-config

(omitted)

interface 1

ip address 222.121.68.247/24

!

!

!

SWITCH(config)# ip redirects

SWITCH(config)# show running-config

(omitted)

interface 1

ip address 222.121.68.247/24

!!

ip redirects

!

!

SWITCH(config)#

7.14.4

The policy of unreached messages

When the packets can’t reach Destination host or the network, the switch is supposed to
bring them back to the source IP address. What if too many unreached packets are com-
ing into the system, it might cause slow down the system operation.

Not to bring these messages back to source IP address on a specific interface, use the
following command on Interface Configuration mode.

Command Mode

Description

ip unreachables

Configures not to bring unreached messages back to
their source IP address on interface.

no ip unreachables

Interface

Brings all unreached messages back to their source IP
address on interface.

7.15

IP TCP Flag Control

TCP (Transmission Control Protocol) header includes six kinds of flags that are URG,
ACK, PSH, RST, SYN, and FIN. For the hiD 6615 S223/S323, you can configure RST
and SYN as the below.

7.15.1 RST

Configuration

RST sends a message when TCP connection can not be done to a person who tries to
make it. However, it is also possible to configure to block the message. This function will

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