Avaya Configuring Dial Services Manual do Utilizador descarregar pdf (Página 127)

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Implementation Notes for All Dial Services

308621-14.00 Rev 00

5-5

In Figure 5-3, routers A and B each have a caller resolution table that maps local

circuits to the names of remote callers.

Router A calls router B. When router A makes the call, it places its local CHAP

name, Branch_A, and CHAP secret in the CHAP challenge message. Router B’s

caller resolution table shows Branch_A assigned to Circuit 5, the connection to

router A. When router B receives the call, it looks in its table, confirms

router A’s CHAP name (referred to as the Caller Name in the table) and CHAP

secret, and activates Circuit 5.

Conversely, when router B calls router A, it places its local CHAP name,

Branch_B, in the CHAP challenge message. Router A looks in its table, verifies

that router B is an authorized caller, and brings up circuit 27, the connection to

router B.

PAP is similar to CHAP, but PAP uses a PAP ID and password as part of the

identification process. The calling router places its PAP ID and password in the

authenticate request to the called router. The called router first looks in the caller

resolution table to find the PAP ID (referred to as the Caller Name in the table). If

the router finds the PAP ID, it then checks the table for the password associated

with the ID and compares it to the password in the authenticate request. If the

passwords match, the router brings up the circuit.

To configure the caller resolution table, see Chapter 16, “Customizing Caller

Resolution.” For more information about CHAP names and PAP IDs, see

Configuring PPP Services.

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