3 gratuitous arp configuration example, 4 gratuitous arp troubleshooting, Ratuitous – QTECH QSW-3400 Инструкция по настройке User Manual

Page 223: Onfiguration, Xample, Roubleshooting

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28.3 Gratuitous ARP Configuration Example

Gratuitous ARP Configuration Example

For the network topology shown in the figure above, interface VLAN10 whose IP address is

192.168.15.254 and network address mask is 255.255.255.0 in the switch system. Five PCs

PC1, PC2, PC3, PC4, PC5 are connected to the interface. Gratuitous ARP can be enabled

through the following configuration:

1. Configure global gratuitous ARP
Switch(config)#ip gratuitous-arp 300
Switch(config)#exit

2. Configure interface gratuitous ARP
Switch(config)#interface vlan 10
Switch(Config-if-Vlan10)#ip gratuitous-arp 300
Switch(Config-if-Vlan10)#exit
Switch(config) #exit

28.4 Gratuitous ARP Troubleshooting

Gratuitous ARP is disabled by default. And when gratuitous ARP is enabled, the debugging

information about ARP packets can be retrieved through the command debug ARP send.

If gratuitous ARP is enabled in global configuration mode, it can be disabled only in global

configuration mode. If gratuitous ARP is configured in interface configuration mode, the

PC1

PC2

PC3

PC4

PC5

Switch

Interface vlan10

192.168.15.254

255.255.255.0

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