Avaya Configuring DLSw Services Manual do Utilizador descarregar pdf (Página 33)

Data Link Switching Overview

304233-A Rev. 00

1-11

When end station 1 generates an SNA TestP message, the following steps occur:

1. Router A receives the TestP message on slot 3.

2. Router A multicasts a CANUREACH_ex message on slot 2, using the group

address 224.0.10.0.

3. Router B and C receive the CANUREACH_ex message and forward the

message to slot 3, configured with the IP multicast group address.

4. Router B sends a TestP message on slot 3 to host 1.

5. Router C sends a TestP message on slot 3 to host 2.

6. Host 1 responds to the TestP message by sending a TestF message.

7. Router B receives the TestF message on slot 3.

8. Router B sends an ICANREACH_ex message on slot 2. (Router B sends this

message in an IP unicast datagram.)

9. Router A receives the ICANREACH_ex unicast message on slot 2 and

forwards it to DLSw slot 3.

10. Router A sends a TestF message to end station 1.

DLSw Single-Switch and Dual-Switch Services

Bay Networks routers that you configure to support DLSw services can operate in

two modes:

• A DLSw single-switch configuration involving a single local router with two

(or more) interfaces configured for DLSw

• A DLSw dual switch-to-switch configuration involving paired routers, each

connected to an intervening TCP/IP network

A Bay Networks router simultaneously supports both single- and dual-switch

operation. Figure 1-4

illustrates DLSw single-switch and dual switch-to-switch

networks.

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Avaya Configuring DLSw Services Manual do Utilizador Página 33