Administrator Guide

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Codes: * - cam usage is above 90%.

Allocating FP Blocks for VLAN Processes

The VLAN contentaware processor (VCAP) application is a pre-ingress CAP that modifies the VLAN settings before packets are

forwarded. To support ACL CAM optimization, the CAM carving feature is enhanced. A total of four VCAP groups are present: two fixed

groups and two dynamic groups. Of the two dynamic groups, you can allocate zero, one, or two FP blocks to iSCSI Counters, Open Flow,

and ACL Optimization.

You can configure only two of these features at a time.

• To allocate the number of FP blocks for VLAN open flow operations, use the cam-acl-vlan vlanopenflow <0-2> command.

• To allocate the number of FP blocks for VLAN iSCSI counters, use the cam-acl-vlan vlaniscsi <0-2> command.

• To allocate the number of FP blocks for ACL VLAN optimization, use the cam-acl-vlan vlanaclopt <0-2> command.

To reset the number of FP blocks to the default, use the no version of these commands. By default, zero groups are allocated for the ACL

in VCAP. ACL VLAN groups or CAM optimization is not enabled by default. You must also allocate the slices for CAM optimization.

To display the number of FP blocks that is allocated for the different VLAN services, use the show cam-acl-vlan command. After you

configure the ACL VLAN groups, reboot the system to store the settings in nonvolatile storage. During CAM initialization, the chassis

manager reads the NVRAM and allocates the dynamic VCAP regions.

Unified Forwarding Table (UFT) Modes

Unified Forwarding Table (UFT) consolidates the resources of several search tables (Layer 2, Layer 3 Hosts, and Layer 3 Route [Longest

Prefix Match — LPM]) into a single flexible resource. Dell EMC Networking OS supports several UFT modes to extract the forwarding

tables, as required. By default, Dell EMC Networking OS initializes the table sizes to UFT mode 2 profile, since it provides a reasonable

shared memory for all the tables. The other supported UFT modes are scaled-l3–hosts (UFT mode 3) and scaled-l3–routes (UFT mode

4).

Configuring UFT Modes

To configure the Unified Forwarding Table (UFT) modes, follow these steps.

1. Select a mode to initialize the maximum scalability size for L2 MAC table or L3 Host table or L3 Route table.

CONFIGURATION

hardware forwarding-table mode

DellEMC(conf)#hardware forwarding-table mode ?

scaled-l3-hosts Forwarding table mode for scaling L3 host entries

scaled-l3-routes Forwarding table mode for scaling L3 route entries

DellEMC(conf)#

DellEMC(conf)#hardware forwarding-table mode scaled-l3-hosts

Hardware forwarding-table mode is changed. Save the configuration and reload to take

effect.

DellEMC(conf)#end

DellEMC#write mem

01:13:36: %STKUNIT0-M:CP %FILEMGR-5-FILESAVED: Copied running-config to startup-config in

flash by default

DellEMC(conf)#

DellEMC(conf)#end

DellEMC#01:13:44: %STKUNIT0-M:CP %SYS-5-CONFIG_I: Configured from console

DellEMC#

2. Display the hardware forwarding table mode in the current boot and in the next boot.

EXEC Privilege

show hardware forwarding-table mode

Access Control List (ACL) VLAN Groups and Content Addressable Memory (CAM)