System Basics Introduction
Page 224 7210 SAS D, E, K OS Basic System Configuration Guide
The system attempts to allocate resources in order it appears in the configuration file and fails any
match criteria if it does not have any more resources to allocate. User is also provided with a
keyword ‘max’ to indicate that the system needs to allocate resources when it is first required, as
long as the maximum resources allocated for that feature is not exceeded or maximum resource
available in the system is not exceeded. 7210 platforms allocates resources to each of the features
and the match-criteria in fixed size chunks.
The no forms of the command disables the use of corresponding match criteria. During runtime,
the command succeeds, if no SAPs are currently using the criteria. Similarly, reduction of
resources from the current value to a lower value succeeds, if no SAPs are currently using the
criteria. If the system can successfully execute the command, it can free up the resources which
were in use by that slice or chunk and makes it available for use by other features. This implies the
user either deletes a SAP or removes the ingress ACL policy association with a SAP to free up
resources. By executing these commands the system releases some entries in a given chunk or
releases an entire chunk. If an entire chunk is freed, it is returned to the system free pool for use by
other features. If some entries in the chunk are freed, it is made available for use by other SAPs
using the same feature to which the chunk has been allocated to.
The ‘no’ form of the commands which are designated as boot-time does not take effect
immediately. It takes effect after the reboot. Before reboot it is the user’s responsibility to free up
resources required for use by the feature which has been enabled to take effect after the reboot. By
not doing so, results in failure when the configuration file is executed on boot up.
For more details about individual commands and features that use System Resource Allocation.
Please see the CLI descriptions and the feature description in the respective user guides.
Allocation of Egress Internal TCAM resources
Note: This feature is supported only on 7210 SAS-E. It is not supported on 7210 SAS-D and 7210
SAS-K devices.
In the current releases, the system statically allocates egress TCAM resources for use by different
criteria in SAP egress access control list (ACLs) and other purposes. The resource allocation is not
user configurable. With introduction of new capabilities such as IPv6 match criteria in egress, the
static allocation of resources by software does not meet requirements of different customers, who
typically want to use different features. Therefore, ingress internal TCAM resource allocation
capabilities has been extended to the egress internal TCAM resources.
For more details about individual commands and features that use System Resource Allocation.
Please see the CLI descriptions and the feature description in the respective user guides.
NOTE: Boot-time commands under the config> system> resource-profile will not take effect
when a configuration file is executed using the 'exec' CLI command. Boot-time commands under
the config> system> resource-profile are read and acted upon by the system only during boot.
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