Cisco Catalyst 4500 Series Software Configuration Guide

CHAPTER
43-1
Catalyst 4500 Series Switch, Cisco IOS Software Configuration Guide - Cisco IOS XE 3.9.xE and IOS 15.2(5)Ex
43
Configuring VRF-lite
Virtual Private Networks (VPNs) provide a secure way for customers to share bandwidth over an ISP
backbone network. A VPN is a collection of sites sharing a common routing table. A customer site is
connected to the service provider network by one or more interfaces, and the service provider associates
each interface with a VPN routing table. A VPN routing table is called a VPN routing/forwarding (VRF)
table.
With the VRF-lite feature, the Catalyst 4500 series switch supports multiple VPN routing/forwarding
instances in customer edge devices. (VRF-lite is also termed multi-VRF CE, or multi-VRF Customer
Edge Device). VRF-lite allows a service provider to support two or more VPNs with overlapping IP
addresses using one interface.
This document addresses both IPv4 and IPv6 VRF-lite.
Note Starting with Cisco IOS Release 12.2(52)SG, the Catalyst 4500 switch supports VRF-lite NSF support
with routing protocols OSPF/EIGRP/BGP.
This chapter includes these topics:
• About VRF-lite, page 43-2
• VRF-lite Configuration Guidelines, page 43-3
• Configuring VRF-lite for IPv4, page 43-4
• Configuring VRF-lite for IPv6, page 43-14
• VPN Co-existence Between IPv4 and IPv6, page 43-27
• Migrating from the Old to New CLI Scheme, page 43-27
Note The switch does not use Multiprotocol Label Switching (MPLS) to support VPNs. For information about
MPLS VRF, refer to the Cisco IOS Switching Services Configuration Guide at:
http://www.cisco.com/en/US/docs/ios/mpls/configuration/guide/mp_vpn_ipv4_ipv6_ps6922_TSD_Pro
ducts_Configuration_Guide_Chapter.html
For complete syntax and usage information for the switch commands used in this chapter, see the
Cisco IOS Command Reference Guides for the Catalyst 4500 Series Switch.
If a command is not in the Cisco Catalyst 4500 Series Switch Command Reference , you can locate it in
the Cisco IOS Master Command List, All Releases.

Cisco Catalyst 4500 Series Specifications

General

Series	Catalyst 4500 Series
Category	Switch
Layer Support	Layer 2, Layer 3
Form Factor	Modular chassis
Stackable	No
Chassis Slots	3, 6, 7, 10
Power Supply Options	AC, DC
Redundancy	Power supply, Supervisor engine
Network Management	Cisco IOS Software CLI, SNMP, Cisco Prime Infrastructure
Features	Security, QoS
Port Density	Up to 384 ports per chassis
Security Features	802.1X, ACLs, DHCP Snooping, Dynamic ARP Inspection, IP Source Guard
Supervisor Engine	8-E