Configuring basic MPLS ·············································································································································· 1

Overview ············································································································································································ 1

Basic concepts ·························································································································································· 1

MPLS network architecture ······································································································································ 3

LSP establishment ······················································································································································ 3

MPLS forwarding ······················································································································································ 4

PHP ············································································································································································· 5

Protocols and standards ·········································································································································· 5

MPLS configuration task list ·············································································································································· 5

Enabling MPLS ··································································································································································· 6

Configuring MPLS MTU ···················································································································································· 6

Specifying the label type advertised by the egress ······································································································· 7

Configuring TTL propagation ··········································································································································· 8

Enabling sending of MPLS TTL-expired messages ········································································································· 9

Enabling MPLS forwarding statistics ···························································································································· 10

Enabling SNMP notifications for MPLS ························································································································ 10

Displaying and maintaining MPLS ······························································································································· 10

Configuring a static LSP ············································································································································· 12

Configuration prerequisites ··········································································································································· 12

Configuration procedure ··············································································································································· 12

Displaying static LSPs ····················································································································································· 13

Static LSP configuration example ································································································································· 13

Network requirements ··········································································································································· 13

Configuration restrictions and guidelines ··········································································································· 14

Verifying the configuration ··································································································································· 15

Configuring LDP ························································································································································· 16

Terminology ··························································································································································· 16

LDP messages ························································································································································· 16

LDP operation ························································································································································· 17

Label distribution and control ······························································································································· 18

LDP GR ···································································································································································· 20

LDP NSR ································································································································································· 21

LDP-IGP synchronization ······································································································································· 22

LDP FRR ··································································································································································· 23

Protocols ································································································································································· 23

LDP configuration task list ·············································································································································· 23

Enabling LDP ··································································································································································· 24

Enabling LDP globally ··········································································································································· 24

Enabling LDP on an interface ······························································································································· 24

Configuring Hello parameters ······································································································································ 25

Configuring LDP session parameters ···························································································································· 26

Configuring LDP backoff ··············································································································································· 27

Configuring LDP MD5 authentication ·························································································································· 27

Configuring an LSP generation policy ························································································································· 28

Configuring the LDP label distribution control mode ·································································································· 28