Troubleshooting guide

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ATM and Layer 3 Switch Router Troubleshooting Guide
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Chapter 11 Troubleshooting Layer 3 Network Connections
Troubleshooting SDM Problems
Configuring the Switching Database Manager
This section describes how to configure the SDM to change the size of the protocol-specific TCAM
regions in the switch router.
To modify the default TCAM region sizes, use the following procedure:
Step 1 Based on your network protocol mix and the number of prefixes and stations in the network, determine
the required size of the various protocol-specific TCAM regions.
Step 2 Modify the size of each region using the sdm size global configuration command.
Step 3 If desired, modify the SDM autolearn function using the [no] sdm autolearn global configuration
command.
Step 4 Before reloading the system, verify that the desired sizing is reflected in the configuration (use the show
running-config command).
Step 5 Reload the switch router to implement the new partitioning configuration.
The following process shows how to enlarge the size of the ip-prefix TCAM partition from 65,536 32-bit
entries to 131,072 32-bit entries.
Note You must reload the system in order for the changes to take effect.
Follow these steps to check and configure the SDM size:
Step 1 Use the show sdm size command to see the configuration of the SDM CAM size.
Switch# show sdm size
Switching Database Region Sizes :
IPX Direct : 224 32-bit entries
IPX Node : 4096 64-bit entries
IP Adjacency : 4096 32-bit entries
IP Prefix : 65536 32-bit entries
IP VRF Prefix : 512 64-bit entries
IP Multicast : 32768 64-bit entries
UDP Flooding : 256 64-bit entries
MAC Addr : 1024 64-bit entries
LFIB : 1024 32-bit entries
Label : 8192 32-bit entries
Access List : 512 128-bit entries
Switch#
Step 2 Use the sdm size ip-prefix k-entries command to change the ip-prefix from 65,536 32-bit bytes to
131,072 32-bit bytes. Using the k-entries parameter with the 128 (Kbytes) * 1024 multiples, equals
131,072 32-bit entries.
Switch(config)# sdm size ip-prefix k-entries 128