Arp Pnp Commands; Arp Pnp - HP MSR Series Command Reference Manual

ARP PnP commands

arp pnp

Use arp pnp to enable the ARP plug and play (PnP) feature.
Use undo arp pnp to restore the default.
Syntax
arp pnp
undo arp pnp
Default
The ARP PnP feature is disabled.
Views
Layer 3 Ethernet interface view, Layer 3 Ethernet subinterface view
Predefined user roles
network-admin
Usage guidelines
This command is typically configured on a gateway. The ARP PnP feature allows end users to access the
gateway without changing their IP addresses on subnets different from the subnet where the gateway
resides.
The ARP PnP feature generates agent IP addresses based on the primary IP address and mask length of
the interface. The maximum number of agent IP addresses allowed on an interface is the smaller value
of the following items:
The device's limit on the maximum number of agent IP addresses on the interface.
•
The maximum number of host IP addresses allowed by the mask length. The interface's primary IP
•
address is excluded. For example, if the mask length is 24, a maximum of 253 agent IP addresses
can be generated.
To make ARP PnP function correctly on an interface, make sure the following requirements are met:
The interface has a primary IP address.
•
NAT is configured on the interface that connects to the external network.
•
ARP entries on the interface are all deleted by using the reset arp command before you enable the
•
ARP PnP feature.
Features that use ARP entries, for example, static routes and proxy ARP, cannot function correctly when
the ARP PnP feature is enabled.
Examples
# Enable the ARP PnP feature.
<Sysname> system-view
[sysname] interface gigabitethernet 2/0/1
[Sysname-GigabitEthernet2/0/1] arp pnp
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