User Guide

CHAPTER

17-1

Catalyst 6500 Series Switch Cisco IOS Software Configuration Guide—Release 12.1 E

78-14099-04

Configuring IP Unicast Layer 3 Switching on

Supervisor Engine 2

This chapter describes how to configure IP unicast Layer 3 switching for Policy Feature Card 2 (PFC2),

Distributed Forwarding Cards (DFCs), and Multilayer Switch Feature Card 2 (MSFC2).

Note For complete syntax and usage information for the commands used in this chapter, refer to the

Catalyst 6500 Series Switch Cisco IOS Command Reference publication and the publications at

this URL:

http://www.cisco.com/univercd/cc/td/doc/product/software/ios121/121cgcr/index.htm

This chapter consists of these sections:

• Understanding How Layer 3 Switching Works, page 17-1

• Default Hardware Layer 3 Switching Configuration, page 17-4

• Layer 3 Switching Configuration Guidelines and Restrictions, page 17-4

• Configuring Hardware Layer 3 Switching, page 17-5

• Displaying Hardware Layer 3 Switching Statistics, page 17-6

Note • Supervisor Engine 2, PFC2, and MSFC2 support IPX with fast switching on the MSFC2. For more

information, refer to this URL:

http://www.cisco.com/univercd/cc/td/doc/product/software/ios121/121cgcr/switch_c/xcprt1/xcdips

p.htm

• For information about IP multicast Layer 3 switching, see Chapter 18, “Configuring IP Multicast

Layer 3 Switching.”

Understanding How Layer 3 Switching Works

These sections describe Layer 3 switching with PFC2 and DFCs:

• Understanding Hardware Layer 3 Switching on PFC2 and DFCs, page 17-2

• Understanding Layer 3-Switched Packet Rewrite, page 17-2