Configuring Mpls Vpns; Default Mpls Configuration; Mpls Vpn Configuration Guidelines - Cisco 3845 - Security Bundle Router Software Manual

Chapter 34 Configuring MPLS, MPLS VPN, MPLS OAM, and EoMPLS

Configuring MPLS VPNs

This section includes this information about configuring MPLS VPNs on a switch used as a PE router:
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These sections describe the required tasks:
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You must also configure a provider-edge-to-customer-edge routing session. These sections provide
example configurations:
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For an example of packet flow in an MPLS VPN, see the
page

Default MPLS Configuration

By default, label switching of IPv4 packets along normally routed paths is globally enabled. MPLS
forwarding of IPv4 packets is disabled by default on interfaces.
If no label protocol is explicitly configured for an interface, the default label distribution protocol for the
switch is used by the Label Distribution Protocol (LDP). By default, the labels of all destinations are
advertised to all LDP neighbors.
No VRFs are defined. The default routing table for an interface is the global routing table.

MPLS VPN Configuration Guidelines

Follow these guidelines when configuring MPLS VPN:
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OL-23400-01
Default MPLS Configuration, page 34-7
MPLS VPN Configuration Guidelines, page 34-7
Enabling MPLS, page 34-8
Defining VPNs, page 34-9
Configuring BGP Routing Sessions, page 34-10
Configuring Provider-Edge-to-Provider-Edge Routing Sessions, page 34-10
Configuring Provider-Edge-to-Customer-Edge Routing Sessions, page 34-11
BGP Provider-Edge-to-Customer-Edge Configuration, page 34-11
OSPF Provider-Edge-to-Customer-Edge Configuration, page 34-12
RIPv2 Provider-Edge-to-Customer-Edge Routing Sessions, page 34-13
Configuring Static Route Provider-Edge-to-Customer-Edge Routing Sessions, page 34-14
EIGRP Provider-Edge-to-Customer-Edge Configuration, page 34-14
34-15.
MPLS requires that CEF is enabled on the switch. CEF is enabled by default. For more information
about CEF, see the "Configuring Cisco Express Forwarding" section on page
The switch supports MPLS forwarding on the following interfaces:
– Routed ports
– SVIs
– Routed EtherChannels
"Packet Flow in an MPLS VPN" section on
Cisco ME 3800X and 3600X Switch Software Configuration Guide
Configuring MPLS VPNs
29-93.
34-7