Cisco ONS 15454 - Configuring SDM; Configuring SDM Regions

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Cisco ONS 15454 SONET/SDH ML-Series Multilayer Ethernet Card Software Feature and Configuration Guide, R4.0
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Chapter 14 Configuring the Switching Database Manager
Configuring SDM
• 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 may exist,
but some have priority over others. The weight is used to select one entry when multiple entries
match.
TCAM space consists of 65,536 entries, each entry being 64 bits wide. Because SDM is responsible for
managing TCAM space, SDM partitions the entire TCAM space for each application region based on
user configuration. Although the maximum size of all application regions is fixed, you can reconfigure
the maximum size of each application region.
Table 14-1 lists default partitioning for each application region in TCAM.
Configuring SDM
This section describes the commands necessary to configure the SDM. It includes commands to
configure the size of the SDM regions. The commands described in this section are unique to the
switching software.
Configuring SDM Regions
TCAM space consists of 65,536 entries, each entry being 64 bits wide. Since SDM is responsible for
managing TCAM space, SDM partitions the entire TCAM space for each application region based on
user configuration. A change in the partition configuration takes effect the next time you reboot the
system.
The application region size in SDM is represented by the number of 64-bit entries. The combined size
of all the application regions should be calculated in terms of 64-bit TCAM entries and should not exceed
65,536 bytes, which is the total TCAM size.
Table 14-1 Default Partitioning by Application Region in TCAM
Application
Region Lookup Type Key Size Default Size No. of TCAM Entries
IP Adjacency Exact-match 64 bits 65536 (shared) 65536 (shared)
IP Prefix Longest-match 64 bits 65536 (shared) 65536 (shared)
QoS Classifiers Weighted exact-match 64 bits 65536 (shared) 65536 (shared)
IP VRF Prefix Longest prefix match 64 bits 65536 (shared) 65536 (shared)
IP Multicast Longest prefix match 64 bits 65536 (shared) 65536 (shared)
MAC Addr Longest prefix match 64 bits 65536 (shared) 65536 (shared)
Access List weighted exact match 64 bits 65536 (shared) 65536 (shared)