H3C SOHO IE4300, Command Reference Manual

Page: 693 / 3296

9
Usage guidelines
This probe mechanism keeps legal dynamic ARP entries valid and avoids unnecessary ARP
resolution during later traffic forwarding. This probe feature sends ARP requests for the IP address in
a dynamic ARP entry.
•
If the device receives an ARP reply before the entry aging timer expires, the device resets the
aging timer.
•
If the device does not receive any ARP reply after the maximum number of probes is made, the
device deletes the entry when the entry aging timer expires.
You can set the maximum number of probes in system view and in interface view. The probe count
set in interface view takes precedence over the probe count set in system view.
Examples
# Allow the device to perform a maximum of five probes for dynamic ARP entries.
<Sysname> system-view
[Sysname] arp timer aging probe-count 5
# Allow the device to perform a maximum of five probes for dynamic ARP entries on VLAN-interface
2.
<Sysname> system-view
[Sysname] interface vlan-interface 2
[Sysname-Vlan-interface2] arp timer aging probe-count 5
Related commands
arp timer aging
arp timer aging probe-interval
arp timer aging probe-interval
Use
arp timer aging probe-interval
to set the interval for probing dynamic ARP entries.
Use undo arp timer aging probe-interval to restore the default.
Syntax
arp timer aging probe-interval interval
undo arp timer aging probe-interval
Default
In system view, the probe interval is 5 seconds.
In interface view, the probe interval equals the setting in system view.
Views
System view
VLAN interface view
Predefined user roles
network-admin
Parameters
Interval : Specifies the probe interval in seconds. The value rang is 1 to 60.