Cisco Catalyst 3750 - Displaying Multi-VRF CE Status; Configuring Protocol-Independent Features; Configuring Cisco Express Forwarding

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Catalyst 3750 Metro Switch Software Configuration Guide
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Chapter 28 Configuring IP Unicast Routing
Configuring Protocol-Independent Features
Displaying Multi-VRF CE Status
You can use the privileged EXEC commands in Table 28-7 to display information about multi-VRF CE
configuration and status.
For more information about the information in the displays, refer to the Cisco IOS Switching Services
Command Reference for Release 12.1.
Configuring Protocol-Independent Features
This section describes how to configure IP routing protocol-independent features.For a complete
description of the IP routing protocol-independent commands in this chapter, refer to the “IP Routing
Protocol-Independent Commands” chapter of the Cisco IOS IP and IP Routing Command Reference for
Release 12.1.
This section includes these procedures:
• Configuring Cisco Express Forwarding, page 28-86
• Configuring the Number of Equal-Cost Routing Paths, page 28-87
• Configuring Static Unicast Routes, page 28-88
• Specifying Default Routes and Networks, page 28-89
• Using Route Maps to Redistribute Routing Information, page 28-90
• Configuring Policy-Based Routing, page 28-94
• Filtering Routing Information, page 28-96
• Managing Authentication Keys, page 28-99
Configuring Cisco Express Forwarding
Cisco Express Forwarding (CEF) is a Layer 3 IP switching technology used to optimize network
performance. CEF implements an advanced IP look-up and forwarding algorithm to deliver maximum
Layer 3 switching performance. CEF is less CPU-intensive than fast switching route caching, allowing
more CPU processing power to be dedicated to packet forwarding.In dynamic networks, fast switching
cache entries are frequently invalidated because of routing changes, which can cause traffic to be process
switched using the routing table, instead of fast switched using the route cache. CEF uses the Forwarding
Information Base (FIB) lookup table to perform destination-based switching of IP packets.
Table 28-17 Show IP OSPF Statistics Commands
Command Purpose
show ip protocols vrf vrf-name Display routing protocol information associated
with a VRF.
show ip route vrf vrf-name [connected] [protocol [as-number]] [list]
[mobile] [odr] [profile] [static] [summary] [supernets-only]
Display IP routing table information associated
with a VRF.
show ip vrf [brief | detail | interfaces] [vrf-name] Display information about the defined VRF
instances.