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Configuring DLSw Services

C-8

304233-A Rev. 00

• If the destination device resides on an attached LAN, then this device

responds by broadcasting a TEST (RESPONSE) message. Upon receiving

this response, the remote router:

-- Caches the MAC address (for SNA) or name (for NetBIOS) in the

appropriate table on the router.

-- Converts the TEST (RESPONSE) packet into a DLSw ICANREACH

frame.

-- Forwards the ICANREACH to the originating data link switch (router).

• Upon receiving the ICANREACH, the originating router:

-- Caches the MAC address or NetBIOS name and identity of the remote

router in the appropriate table on the router.

-- Converts the ICANREACH back to a TEST (RESPONSE) frame.

-- Forwards the packet to the originating workstation.

At completion, all routers and endstations can forward SNA and NetBIOS packets

appropriately, creating a logical session between endpoints.

Each slot on a Bay Networks router running DLSw functions as an independent

data link switch. The network administrator controls the packets forwarded to

DLSw by specifying the appropriate SAPs in the DLSw SAP Table.

Establishing DLSw/LLC Connections

Figure C-1 illustrates a sample dual-switch DLSw network and the network

packet exchanges (transactions) that occur when two DLSw routers connect to

each other. Connections generate debug event messages in the log file. These

messages provide critical information that can help you troubleshoot or report

network connection problems.

Figure C-1

identifies each transaction with a message number. Use this number to

point to the specific debug message that describes the network activity.

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