Cisco Systems 12.4 Configuration Examples for MPLS LDP Autoconfiguration

• IS-IS is up.

• LDP is enabled.

If the MPLS LDP Autoconfiguration feature is not enabled on an interface, the output looks like the following:

Example:

Interface: Ethernet0; ISIS tag null enabled

ISIS is UP on interface

AUTOCONFIG Information :

LDP enabled: NO

SYNC Information :

Required: NO

• Troubleshooting Tips, page 61

You can use the debug mpls ldp autoconfigcommand to display events that are related to the MPLS LDP

Autoconfiguration feature.

Configuration Examples for MPLS LDP Autoconfiguration

The following sections show examples for the MPLS LDP Autoconfiguration feature with OSPF and IS-IS

processes.

• MPLS LDP Autoconfiguration with OSPF Example, page 61

• MPLS LDP Autoconfiguration with IS-IS Examples, page 62

The following configuration commands enable LDP for OSPF process 1 area 3. The mpls ldp autoconfig

area 3 command and the OSPF network commands enable LDP on POS interfaces 0/0, 0/1, and 1/1. The

no mpls ldp igp autoconfig command on POS interface 1/0 prevents LDP from being enabled on POS

interface 1/0, even though OSPF is enabled for that interface.

configure terminal

interface POS 0/0

ip address 10.0.0.1 255.0.0.0

interface POS 0/1

ip address 10.0.1.1 255.0.0.1

interface POS 1/1

ip address 10.1.1.1 255.255.0.0

interface POS 1/0

ip address 10.1.0.1 0.1.0.255

exit

router ospf 1

network 10.0.0.0 0.0.255.255 area 3

network 10.1.0.0 0.0.255.255 area 3

MPLS LDP Autoconfiguration with OSPF Example

Troubleshooting Tips

MPLS LDP Configuration Guide, Cisco IOS Release 12.4