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Table 153 Configuration items

Item Description

Sending Interface

Select one or more interfaces on which gratuitous ARP packets are sent out

periodically, and set the interval at which gratuitous ARP packets are sent.

To enable an interface to send out gratuitous ARP packets periodically, select the

interface from the

Standby Interface

list and click

. To disable an interface from

periodic sending of gratuitous ARP packets, select the interface from the

Sending

Interface

list and click

IMPORTANT:

• You can enable periodic sending of gratuitous ARP packets on a maximum of

1024 interfaces.

• This feature takes effect only when the link of the enabled interface goes up and

an IP address has been assigned to the interface.

• If you change the interval for sending gratuitous ARP packets, the configuration

is effective at the next sending interval.

• The frequency of sending gratuitous ARP packets might be much lower than is

expected if this function is enabled on multiple interfaces, or each interface is

configured with multiple secondary IP addresses, or a small sending interval is

configured in the preceding cases.

• Do not configure this feature on an interface belonging to a VRRP group.

Configuring ARP automatic scanning

IMPORTANT:

Do not perform other operations during an ARP automatic scan.

From the navigation tree, select Advanced > ARP Anti-Attack > Scan.

The ARP scan configuration page appears, as shown in Figure 356.

Figure 356 Con

figuring ARP Scanning

Table 154 Configuration items

Item Description

Interface Specify the interface on which ARP automatic scanning is to be performed.

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