CHAPTE R
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Cisco ONS 15310-CL, ONS 15310-MA, and ONS 15310-MA SDH Ethernet Card Software Feature and Configuration Guide, R9.1 and R9.2
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13
Configuring the Switching Database Manager on the ML-Series Card
This chapter describes the switching database manager (SDM) features built into the ML-Series card and
contains the following major sections:
Understanding the SDM, page 13-1
Understanding SDM Regions, page 13-2
Configuring SDM, page 13-2
Monitoring and Verifying SDM, page 13-3

Understanding the SDM

The ONS 15310-CL and ONS 15310-MA ML-Series card fea tures high-speed forwarding. The
ML-Series card does Layer 2 MAC address lookups through a hash table. Quality of service (QoS)
classifier lookup are done in software and all other lookups are supported by the main policy engine. The
ONS 15310-CL and ONS 15310-MA ML-Series card does not use externa l ternary content-addressable
memory (TCAM) like the ONS 15454 ML-Series card.
The SDM is the software subsystem that manages the switching information. It organizes the switching
information into application-specific regions and configures the size of these application regions. SDM
enables exact-match and longest-match address searches, which result in high-speed forwarding.
A location index is associated with each packet forwarded and conveyed to the forwarding engine. The
forwarding engine uses this location index to derive information associated with each forwarded packet.