Reference Guide

• After installing a secondary RPM into a chassis, copy the running-configuration to the startup-
configuration.
• Change to the default profile if downgrading to a Dell Networking OS version earlier than 6.3.1.1.
• Use the CONFIGURATION mode commands so that the profile is change throughout the system.
• Use the EXEC Privilege mode commands to match the profile of a component to the profile of the
target system.
QoS CAM Region Limitation
To store QoS service policies, the default CAM profile allocates a partition within the IPv4Flow region.
If the QoS CAM space is exceeded, a message similar to the following displays.
If you exceed the QoS CAM space, follow these steps.
1. Verify that you have configured a CAM profile that allocates 24 K entries to the IPv4 system flow
region.
2. Allocate more entries in the IPv4Flow region to QoS.
Dell Networking OS supports the ability to view the actual CAM usage before applying a service-policy.
The test cam-usage service-policy command provides this test framework. For more information,
refer to Pre-Calculating Available QoS CAM Space.
Syslog Error When the Table is Full
In the Dell Networking OS, the table full condition is displayed as CAM full only for LPM. But now the LPM
is split into two tables. There are two syslog errors that are displayed:
1. /65 to /128 Table full.
2. 0/0 – 0/64 Table full.
A table-full error message is displayed once the number of entries is crossed the table size. Table-full
message is generated only once when it crosses the threshold. For subsequent addition of entries, the
table-full message is not recorded you clear the table-full message. The table-full message is cleared
internally when the number of entries is less than the table size.
Syslog Warning Upon 90 Percent Utilization of CAM
CAM utilization includes both the L3_DEFIP and L3_DEFIP_PAIR_128 table entries to calculate the
utilization.
Syslog Warning for Discrepancies Between Configured Extended Prefixes
An error message is displayed if the number of extended prefix entries is different from the configured
value during bootup.
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 Networking
OS supports several UFT modes to extract the forwarding tables, as required. By default, Dell 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).
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Content Addressable Memory (CAM)