Avaya Configuring Frame Relay Services User Manual download pdf (Page 34)

Configuring Frame Relay Services

2-10 114058 Rev. A

Address Resolution

Address resolution maps a remote network address such as an IP address to a local

DLCI number. For most protocols that you conﬁgure for a Frame Relay interface,

the router performs address resolution automatically. However, IP, AppleTalk, and

VINESuse the Address Resolution Protocol (ARP). ARP dynamically generates

an ARP table of addresses and DLCI numbers by sending messages back and

forth to each network node to gather address information. This process increases

broadcast trafﬁc across the network.

To reduce broadcast trafﬁc for all protocols, you can conﬁgure static routes and

adjacent hosts at the protocol level. This eliminates the need for the router to

perform address resolution. To reduce trafﬁc associated speciﬁcally with IP and

VINES address resolution, you can conﬁgure Inverse ARP. Refer to the

appropriate protocol manual for more information about static routes, adjacent

hosts, and Inverse ARP.

Table 2-1 lists how the router handles address resolution for each protocol and

whether or not you can reduce broadcast trafﬁc by modifying the address

resolution conﬁguration.

Table 2-1. How Protocols Handle Address Resolution

Protocol

How Router Performs

Address Resolution Conﬁguration Requirements

Bridge (including

source route) Automatic None

IP ARP

Inverse ARP

None for ARP

Conﬁgure Inverse ARP

DECnet IV Automatic None

VINES ARP

Inverse ARP

None for ARP

Conﬁgure Inverse ARP

IPX Automatic None

XNS Automatic None

AppleTalk AppleTalk ARP None

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Avaya Configuring Frame Relay Services User Manual Page 34