Avaya Configuring DLSw Services User Manual download pdf (Page 85)

DLSw Configuration Overview

303523-A Rev. 00

3-15

Unconfigured Peers

A Bay Networks router running DLSw can respond to requests from remote

routers to initiate DLSw sessions, even if the local router’s Peer IP Table does not

contain the remote peer definition. When DLSw establishes a session to a remote

slot, DLSw dynamically adds the slot to the list of known peers. Any remote

DLSw peer that the router learns dynamically is an unconfigured peer. A router’s

Peer IP Table does not list the unconfigured peers.

DLSw supports unconfigured peers only if you set the DLSw Reject

Unconfigured Peers parameter to Accept.

When a local DLSw peer (Bay Networks or otherwise) receives a broadcast

response from a non-broadcast peer on a Bay Networks router, the local peer

opens a DLSw connection to the unconfigured peer.

Figure 3-5

shows a sample network of three routers running DLSw. This network

uses the following Peer IP Table entries:

• Router A’s Peer IP Table has a single entry, as follows:

-- The DLSw single-switch communication with Router B does not require

an entry in the Peer IP Table.

-- The connection to Router C uses dual-switch DLSw. You must create an

entry in the Peer IP Table so that Router A can forward DLSw broadcasts

to Router C. Router A’s Peer IP Table contains the circuitless IP address

of Router C (192.32.200.1), since this value is the only value in Router

C’s Slot Table.

• Router B communicates to Router A via a single-switch connection. You do

not need a Peer IP Table for Router B.

• Router C communicates with Router A using dual-switch mode. Router C’s

Peer IP Table contains the circuitless IP address of Router A (192.32.100.1).

However, you can use any IP address in Router A’s Slot Table instead of the

circuitless IP address.

When using dual-switch mode, you do not configure DLSw on the links between

the routers. You must configure IP on these interfaces.When communicating using

single-switch mode, you must configure DLSw on the connecting interfaces.

Note that either link from Router A to Router C can transport DLSw traffic.

Standard IP routing determines the link over which these routers communicate.

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Avaya Configuring DLSw Services User Manual Page 85