Avaya Configuring Frame Relay Services Bedienungsanleitung PDF herunterladen (Seite 40)

Configuring Frame Relay Services

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Source Routing

Source routing is the method by which a bridge sends data across two networks.

The router supports source routing over frame relay networks, using RFC 1490

standard frame relay data encapsulation.

To configure source routing, see Configuring Bridging Services.

RFC 1490

RFC 1490 defines the encapsulation method for sending data across a frame relay

network. Nortel Networks routers implement RFC 1490 for all protocols that

Nortel Networks supports over frame relay networks.

Address Resolution for PVCs

Address resolution for PVCs 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 VINES

use 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 VINES

address resolution, you can configure Inverse ARP. Inverse ARP is the default for

IP over frame relay. Refer to the appropriate protocol manual for more

information about static routes, adjacent hosts, and Inverse ARP.

Table 1-5

lists how the router handles address resolution for each protocol and

whether you can reduce broadcast traffic by modifying the address resolution

configuration.

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Avaya Configuring Frame Relay Services Bedienungsanleitung Seite 40