Avaya Configuring IP, ARP, RIP, and OSPF Services Uživatelský manuál stáhnout pdf (Strana 122)

Configuring IP, ARP, RIP, and OSPF Services

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117356-E Rev 00

Selecting an Address Resolution Scheme for an IP Interface

In addition to ARP, IP supports Inverse ARP, HP Probe, and X.25

address-resolution schemes as follows:

• Inverse ARP provides address resolution for frame relay interfaces. Use

Inverse ARP 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 using the 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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Avaya Configuring IP, ARP, RIP, and OSPF Services Uživatelský manuál Strana 122