
DLSw Implementation Notes
114063 Rev. A 2-7
Figure 2-3. DLSw and Source Route Bridging on SRB Circuits
DLSw and Bridging Services
This section presents the different types of bridging services that coexist on a
circuit with DLSw, and explains any differences in TEST or explorer frame
handling on these circuits. This information is useful when you examine traffic on
LANs locally attached to the router.
DLSw on an Ethernet/802.3 Circuit
The router supports DLSw configured on an Ethernet/802.3 circuit. The DLSw
software provides bridging services between Ethernet/802.3 LAN segments
locally attached to the same router.
The DLSw interface takes precedence over the transparent bridge interface
whenever the destination SAP address identified in a TEST frame received from
the local circuit already exists in the router’s DLSw configuration. In this case,
only the DLSw interface:
• Captures the locally received TEST frame
• Attempts to locate the destination SAP address specified in that frame
SRB Packet
Router
Forward to DLSw
Forward to SRB
Copy
DLS0028A
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