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Cisco ME 3400 Ethernet Access Switch Software Configuration Guide
OL-9639-06
Chapter 35 Configuring IP Unicast Routing
Configuring Protocol-Independent Features
Displaying Multi-VRF CE Status
You can use the privileged EXEC commands in Table 35-15 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, Release 12.2.
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, see the “IP Routing
Protocol-Independent Commands” chapter of the Cisco IOS IP Command Reference, Volume 2 of 3:
Routing Protocols, Release 12.2.
These sections contain this configuration information:
• Configuring Cisco Express Forwarding, page 35-88
• Configuring the Number of Equal-Cost Routing Paths, page 35-90
• Configuring Static Unicast Routes, page 35-90
• Specifying Default Routes and Networks, page 35-91
• Using Route Maps to Redistribute Routing Information, page 35-92
• Configuring Policy-Based Routing, page 35-96
• Filtering Routing Information, page 35-99
• Managing Authentication Keys, page 35-101
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 use the Forwarding
Information Base (FIB) lookup table to perform destination-based switching of IP packets.
Ta ble 35-15 Commands for Displaying Multi-VRF CE Information
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.