Siemens S223 - Manual (Page 169)

User Manual UMN:CLI
SURPASS hiD 6615 S223/S323 R1.5
A50010-Y3-C150-2-7619 169
7.13.4 Gratuitous ARP
Gratuitous ARP is a broadcast packet like an ARP request. It containing IP address and
MAC address of gateway, and the network is accessible even though IP addresses of
specific host’s gateway are repeatedly assigned to the other.
Configure Gratuitous ARP interval and transmission count using following commands.
And configure transmission delivery-start in order to transmit Gratuitous ARP after ARP
reply.
Gratuitous ARP is transmitted after some time from transmitting ARP reply.
Command Mode Description
arp-patrol TIME COUNT [TIME]
Configures a gratuitous ARP.
TIME: transmit interval
COUNT: transmit count
no arp-patrol
Global
Disables a gratuitous ARP.
The following is an example of configuring the transmission interval as 10 sec and trans-
mission times as 4 and showing it.
SWITCH(config)# arp-patrol 10 4
SWITCH(config)# show running-config
Building configuration...
Current configuration:
hostname SWITCH
(Omitted)
arp-patrol 10 4
!
no snmp
!
SWITCH(config)#
7.13.5 Proxy-ARP
To configure Proxy-ARP, you need to enter Interface configuration mode and use the fol-
lowing command.
Command Mode Description
ip proxy-arp Sets proxy-ARP at specified Interface
no ip proxy-arp
Interface
Removes the configured proxy-ARP from the interface.
7.14 ICMP Message Control
ICMP stands for Internet Control Message Protocol. When it is impossible to transmit data
or configure route for data, ICMP sends error message about it to host. The first 4 bytes
of all ICMP messages are same, but the other parts are different ac-cording to type field
value and code field value. There are fifteen values of field to distinguish each different
ICMP message, and code field value helps to distinguish each type in detail.
The following table shows explanation for fifteen values of ICMP message type.