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59-26
User Guide for Cisco Security Manager 4.4
OL-28826-01
Chapter 59 Configuring Router Interfaces
CEF Interface Settings Page
Field Reference
CEF Interface Settings Dialog Box
Use the CEF Interface Settings dialog box to add or edit the CEF properties of interfaces when you want
to configure something different than the global default.
Navigation Path
Go to the CEF Interface Settings Page, page 59-25, then click the Add or Edit button beneath the CEF
Interface Settings table.
Table 59-9 CEF Interface Settings Page
Element Description
Enable Cisco Express
Forwarding
Whether to enable CEF globally on the device. The option is greyed out
if you cannot disable CEF on the device. You can configure other
settings on the page only if you enable CEF globally.
CEF Network Accounting These options are for configuring CEF accounting globally. If you
collect accounting statistics, you can view them using the show ip cef
command on the router. You can select the following options to enable
different types of accounting:
• Enable Accounting for Traffic Through Non-Recursive
Prefixes—For network prefixes with directly connected next hops,
non-recursive accounting enables express forwarding of the
collection of packets through a prefix.
• Enable Per-Prefix Accounting—Accounting statistics based on the
packet’s network prefix.
• Enable Prefix Length Accounting—Accounting statistics based on
the network prefix length.
• Enable Load Balance Hash Accounting—When you use
per-destination load balancing (the default), CEF uses a series of
16 hash buckets to distribute the available paths based on the
source and destination addresses. Enabling load balance hash
accounting provides per-hash-bucket counters.
CEF Interface Settings table The interfaces on the router for which you are defining special CEF
configurations. When you enable CEF globally, by default, all
interfaces on the router enable CEF and use per-destination load
balancing. Add interfaces to this table only if you want to configure
different behavior for the interfaces.
The table shows the name of the interface or interface role, whether
CEF is enabled or disabled, and whether the interface is load balancing
based on destination or on a per-packet basis. For a detailed explanation
of the fields, see CEF Interface Settings Dialog Box, page 59-26.
• To add an interface to the table, click the Add button.
• To edit the settings for an interface, select it and click the Edit
button.
• To delete an interface, select it and click the Delete button.