
Configuring SMDS
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Protocols Supported by SMDS
SMDS can operate with the following protocols:
• AppleTalk
• APPN
• Bridge (including Spanning Tree)
• DECnet IV
• DLSw
• Internet Protocol (IP), including Address Resolution Protocol (ARP) support
• Internet Packet Exchange (IPX)
• LLC2
• Native Mode LAN
• Source Routing with Bay Networks 8101 encapsulation
• Source Routing with Spanning Tree
• VINES
• Xerox Network System (XNS)
Priority of Heartbeat Poll Messages
When you select SMDS on a circuit, the router automatically assigns the highest
priority to heartbeat poll and LMI messages that it sends to the DSU/CSU. The
heartbeat poll and LMI messages must have priority over other data to ensure that
during heavy traffic conditions, the link stays up and allows these messages to get
through to the DSU/CSU.
Note: SMDS does not support OSI.
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