Troubleshooting guide

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ATM and Layer 3 Switch Router Troubleshooting Guide
OL-1969-01
Chapter 11 Troubleshooting Layer 3 Network Connections
Troubleshooting SDM Problems
Label : 8192 32-bit entries
Access List : 512 128-bit entries
Switch#
If you determine that the SDM is configured incorrectly, refer to the “Configuring Switching Database
Manager” chapter in the Layer 3 Switching Software Feature and Configuration Guide.
Troubleshooting Common Errors When Changing SDM Size
This section describes the following two common errors that might occur when you are trying to change
the SDM size of the protocol-specific TCAM regions in the Layer 3 switch:
• The switch router generates a “Total protocol partitions exceed TCAM size!!” error when
configuring the SDM.
• The switch router generates a “%LSS-1-SDM: Region reached limit. Cannot accept more entries”
syslog message at startup, or during normal operation of the switch router.
Note You must reload the system in order for the changes to take effect.
Troubleshooting the “Total protocol partitions exceed TCAM size!!” Error
The switch router generates a “Total protocol partitions exceed TCAM size!!” error while you are
configuring the SDM partition sizes for the following reasons:
• The command entered cannot be processed because the command you entered would cause the total
size of the TCAM protocol partitions to exceed 32K.
• The command entered cannot be processed because the command you entered would cause the size
of that specific TCAM protocol partition to exceed the maximum allowed size for that partition.
To solve the problem, specify a protocol partition size that does not exceed the total TCAM size, or
specify the maximum size of the specified protocol partition.
In this example, the system generates an error when you attempt to specify more than 16,000 entries for
the l2-switching region. The workaround is to ensure the specified size is less than or equal to the
maximum region size, and that the sum of all of the protocol regions does not exceed 32K entries.
Follow these steps to eliminate the “Total protocol partitions exceed TCAM size!!” error while you are
configuring the SDM partition sizes:
Step 1 While in EXEC configuration mode you use the sdm size command to modify the SDM partition sizes
and receive a “Total protocol partitions exceed TCAM size!!” error.
Switch# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Switch(config)# sdm size l2-switching 17000
Total protocol partitions exceed TCAM size!!
Switch(config)# sdm size l2-switching 16001
Total protocol partitions exceed TCAM size!!
Switch(config)#