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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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Chapter 13 Configuring the Switching Database Manager on the ML-Series Card
Understanding SDM Regions
Understanding SDM Regions
SDM partitions multiple application-specific regions and interacts with the individual application
control layers to store switching information. The regions share the total available space. SDM consists
of the following types of regions:
Exact-match region—The exact-match region consists of entries for multiple application regions
such as IP adjacencies.
Longest-match region—Each longest-match region consists of multiple buckets or groups of
Layer 3 address entries organized in decreasing order by mask length. All entries within a bucket
share the same mask value and key size. The buckets can change their size dynamically by
borrowing address entries from neighboring buckets. Although the size of the whole application
region is fixed, you can reconfigure it.
Weighted-exact-match region—The weighted-exact-match region consists of exact-match-entries
with an assigned weight or priority. For example, with QoS, multiple exact match entries might
exist, but some have priority over others. The weight is used to select one entry when multiple
entries match.
Table 13-1 lists default partitioning for each application region.
Configuring SDM
This section describes SDM region size and access control list (ACL) size configuration. The commands
described in this section are unique to the switching software. Configuration changes take place
immediately on the ML-100T-8 card.
Table 13-1 Default Partitioning by Application Region
Application Region Lookup Type Key Size Default Size
IP Adjacency Exact-match 64 bits 300 (shared)
IP Prefix Longest-match 64 bits 300 (shared)
QoS Classifiers Weighted exact-match 64 bits 300 (shared)
IP VRF Prefix Longes t prefix match 64 bits 300 (shared)
IP Multicast Longest prefix match 64 bits 300 (shared)
MAC Addr Longest prefix match 64 bits 8192
Access List Weighted exact match 64 bits 300 (shared)