Avaya Configuring IP Services Manual de usuario Pagina 93

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Customizing IP Services
114065 Rev. A 3-29
Selecting an Address Resolution Scheme for an Interface
In addition to ARP, IP supports Inverse ARP, HP Probe, and X.25 address
resolution schemes:
Inverse ARP provides address resolution for Frame Relay interfaces. It is used
to discover the IP address of the station at the remote end of the virtual circuit.
HP Probe, a Hewlett-Packard proprietary protocol, is an address resolution
mechanism that functions much like ARP to determine a network host’s
physical address when all it knows is the network host’s IP address, by
binding a 32-bit IP address to a 48-bit MAC address. IP supports HP Probe
over Ethernet and the following HP Probe messages:
Unsolicited Reply (incoming and outgoing)
Name Request (incoming)
Name Reply (outgoing)
Virtual Address Reply (incoming and outgoing)
Virtual Address Request (incoming and outgoing)
Proxy Request (incoming and outgoing)
Proxy Reply (incoming and outgoing)
IP can support the concurrent operation of HP Probe and ARP on an interface.
The X.25 address resolution scheme is used on network interfaces that
support the X.25 DDN service.
The RFC 877-compliant address-resolution mechanism is used on network
interfaces that support the X.25 PDN service.
On interfaces configured for a Token Ring network, the router can send ARP
requests as Spanning Tree Explorer (STE) packets or All-Routes Explorer (ARE)
packets.
Note: If bridging is configured and enabled on the interface (in addition to IP),
the Name Request/Reply and the Proxy Request/Reply messages are bridged.
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