Cisco 7609-S Configuration Guide - Page 77
Setting the Number of Memory Partitions, Guidelines, Detailed Steps
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Chapter 4 Configuring Security Contexts Managing Memory for Rules 2. Each established command creates a control and data rule, so this value is doubled in the Total Rules value. 3. This limit is lower than in release 2.3. Setting the Number of Memory Partitions When increasing the number of partitions, the default size of each partition is reduced. If you manually configured the partition sizes (see the "Changing the Memory Partition Size" section on page 4-14), the sizes you set might not be compatible with the new smaller partition sizes. If the current configured sizes do not fit into the new partitions, then the FWSM rejects the new memory partition configuration. The FWSM also checks the rule allocation (see the "Reallocating Rules Between Features for a Specific Memory Partition" section on page 4-19). If you manually allocated rules between features so that the total number of rules allocated is now greater than those available, then the FWSM rejects the new memory partition configuration. Similarly, if the absolute maximum number of rules for a feature is now exceeded, then the FWSM rejects the new memory partition configuration. Note Changing the number of partitions requires you to reload the FWSM. Guidelines Caution Failure to follow these guidelines might result in dropped access list configuration as well as other anomalies, including ACL tree corruption. • The target partition and rule allocation settings must be carefully calculated, planned, and preferably tested in a non-production environment prior to making the change to ensure that all existing contexts and rules can be accommodated. • When failover is used, both FWSMs need to be reloaded at the same time after making partition changes. Reloading both FWSMs causes an outage with no possibility for a zero-downtime reload. At no time should two FWSMs with a mismatched number of partitions or rule limits synchronize over failover. Detailed Steps To change the number of memory partitions, perform the following steps: Step 1 To view the current mapping of contexts to memory partitions, enter the following command: hostname(config)# show resource acl-partition For example, the following output shows that 2 memory partitions are configured: hostname(config)# show resource acl-partition Total number of configured partitions = 2 Partition #0 Mode :exclusive List of Contexts :bandn, borders Number of contexts :2(RefCount:2) Number of rules :0(Max:53087) Partition #1 Mode :non-exclusive List of Contexts :admin, momandpopA, momandpopB, momandpopC momandpopD OL-20748-01 Catalyst 6500 Series Switch and Cisco 7600 Series Router Firewall Services Module Configuration Guide using ASDM 4-13
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