Cisco Catalyst 3550 Series User Manual

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Catalyst 3550 Multilayer Switch Software Configuration Guide
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Chapter 31 Configuring IP Unicast Routing
Configuring Protocol-Independent Features
Displaying Multi-VRF CE Status
You can use the privileged EXEC commands in Table 31-8 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. These features are
available on switches running the SMI or the EMI, but protocol-related features with the SMI are
available only for RIP. 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 31-75
• Configuring the Number of Equal-Cost Routing Paths, page 31-76
• Configuring Static Unicast Routes, page 31-77
• Specifying Default Routes and Networks, page 31-78
• Using Route Maps to Redistribute Routing Information, page 31-79
• Configuring Policy-Based Routing, page 31-82
• Filtering Routing Information, page 31-85
• Managing Authentication Keys, page 31-88
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 the Catalyst 3550 switch, the
hardware uses CEF to achieve Gigabit-speed line-rate IP traffic. In dynamic networks, fast switching
cache entries are frequently invalidated because of routing changes, which can cause traffic to be
Table 31-15 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.

Cisco Catalyst 3550 Series Specifications

General

Brand	Cisco
Model	Catalyst 3550 Series
Category	Network Router
Language	English