Arp Timer Aging Probe-Count - H3C S6550X-HI Series Command Reference Manual

arp timer aging probe-count

Use
arp timer aging probe-count
entries.
Use
undo arp timer aging probe-count
Syntax
arp timer aging probe-count count
undo arp timer aging probe-count
Default
In system view, the maximum number of probes for dynamic ARP entries is 3.
In interface view, the maximum number of probes for dynamic ARP entries is that set in system view.
Views
System view
Layer 3 Ethernet interface view
Layer 3 aggregate interface view
VLAN interface view
Predefined user roles
network-admin
Parameters
: Specifies the maximum number of probes. The value range for this argument is 0 to 10. To
count
disable the device from probing dynamic ARP entries, set the value to 0.
Usage guidelines
This probe mechanism keeps legal dynamic ARP entries valid and avoids unnecessary ARP
resolution in 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 setting in
interface view takes precedence over that 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
to set the maximum number of probes for dynamic ARP
to restore the default.
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